Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 LT |
2 | VERSION = 5 |
3 | PATCHLEVEL = 0 | |
55922c9d | 4 | SUBLEVEL = 0 |
1c163f4c | 5 | EXTRAVERSION = |
2e6e902d | 6 | NAME = Shy Crocodile |
1da177e4 LT |
7 | |
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
ba634ece MY |
14 | # That's our default target when none is given on the command line |
15 | PHONY := _all | |
16 | _all: | |
17 | ||
1da177e4 LT |
18 | # We are using a recursive build, so we need to do a little thinking |
19 | # to get the ordering right. | |
20 | # | |
21 | # Most importantly: sub-Makefiles should only ever modify files in | |
22 | # their own directory. If in some directory we have a dependency on | |
23 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 24 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
25 | # turn into vmlinux), we will call a sub make in that other dir, and |
26 | # after that we are sure that everything which is in that other dir | |
27 | # is now up to date. | |
28 | # | |
29 | # The only cases where we need to modify files which have global | |
30 | # effects are thus separated out and done before the recursive | |
31 | # descending is started. They are now explicitly listed as the | |
32 | # prepare rule. | |
33 | ||
3812b8c5 MY |
34 | ifneq ($(sub-make-done),1) |
35 | ||
36 | # Do not use make's built-in rules and variables | |
37 | # (this increases performance and avoids hard-to-debug behaviour) | |
38 | MAKEFLAGS += -rR | |
39 | ||
b999923c MY |
40 | # 'MAKEFLAGS += -rR' does not become immediately effective for old |
41 | # GNU Make versions. Cancel implicit rules for this Makefile. | |
42 | $(lastword $(MAKEFILE_LIST)): ; | |
43 | ||
3812b8c5 MY |
44 | # Avoid funny character set dependencies |
45 | unexport LC_ALL | |
46 | LC_COLLATE=C | |
47 | LC_NUMERIC=C | |
48 | export LC_COLLATE LC_NUMERIC | |
49 | ||
50 | # Avoid interference with shell env settings | |
51 | unexport GREP_OPTIONS | |
52 | ||
066b7ed9 MM |
53 | # Beautify output |
54 | # --------------------------------------------------------------------------- | |
55 | # | |
56 | # Normally, we echo the whole command before executing it. By making | |
57 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
58 | # $(quiet) to choose other forms of output instead, e.g. | |
59 | # | |
60 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
61 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
62 | # | |
63 | # If $(quiet) is empty, the whole command will be printed. | |
64 | # If it is set to "quiet_", only the short version will be printed. | |
65 | # If it is set to "silent_", nothing will be printed at all, since | |
66 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
67 | # | |
68 | # A simple variant is to prefix commands with $(Q) - that's useful | |
69 | # for commands that shall be hidden in non-verbose mode. | |
70 | # | |
71 | # $(Q)ln $@ :< | |
72 | # | |
73 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
74 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
75 | # | |
1da177e4 LT |
76 | # To put more focus on warnings, be less verbose as default |
77 | # Use 'make V=1' to see the full commands | |
78 | ||
b8b0618c CR |
79 | ifeq ("$(origin V)", "command line") |
80 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
81 | endif |
82 | ifndef KBUILD_VERBOSE | |
83 | KBUILD_VERBOSE = 0 | |
84 | endif | |
85 | ||
066b7ed9 MM |
86 | ifeq ($(KBUILD_VERBOSE),1) |
87 | quiet = | |
88 | Q = | |
89 | else | |
90 | quiet=quiet_ | |
91 | Q = @ | |
92 | endif | |
93 | ||
94 | # If the user is running make -s (silent mode), suppress echoing of | |
95 | # commands | |
96 | ||
6f0fa58e | 97 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 MM |
98 | quiet=silent_ |
99 | endif | |
066b7ed9 MM |
100 | |
101 | export quiet Q KBUILD_VERBOSE | |
102 | ||
1da177e4 LT |
103 | # kbuild supports saving output files in a separate directory. |
104 | # To locate output files in a separate directory two syntaxes are supported. | |
105 | # In both cases the working directory must be the root of the kernel src. | |
106 | # 1) O= | |
107 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 108 | # |
1da177e4 LT |
109 | # 2) Set KBUILD_OUTPUT |
110 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
111 | # where the output files shall be placed. | |
112 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
113 | # make | |
114 | # | |
115 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
116 | # variable. | |
117 | ||
c4e6fff1 C |
118 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
119 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
1da177e4 LT |
120 | |
121 | # OK, Make called in directory where kernel src resides | |
122 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
123 | ifeq ("$(origin O)", "command line") |
124 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
125 | endif |
126 | ||
51193b76 RJ |
127 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
128 | $(error main directory cannot contain spaces nor colons) | |
129 | endif | |
130 | ||
1da177e4 | 131 | ifneq ($(KBUILD_OUTPUT),) |
1da177e4 LT |
132 | # check that the output directory actually exists |
133 | saved-output := $(KBUILD_OUTPUT) | |
028568d8 | 134 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
16f8259c | 135 | && pwd) |
1da177e4 | 136 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 137 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 138 | |
80463f1b MY |
139 | # Look for make include files relative to root of kernel src |
140 | # | |
141 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
142 | # once after the Makefile is read. It is OK since we are going to invoke | |
143 | # 'sub-make' below. | |
144 | MAKEFLAGS += --include-dir=$(CURDIR) | |
145 | ||
3812b8c5 MY |
146 | else |
147 | ||
148 | # Do not print "Entering directory ..." at all for in-tree build. | |
149 | MAKEFLAGS += --no-print-directory | |
150 | ||
151 | endif # ifneq ($(KBUILD_OUTPUT),) | |
152 | ||
0b35786d MM |
153 | PHONY += $(MAKECMDGOALS) sub-make |
154 | ||
1cacc9ab | 155 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 156 | @: |
0b35786d | 157 | |
c4e6fff1 | 158 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 159 | sub-make: |
3812b8c5 MY |
160 | $(Q)$(MAKE) sub-make-done=1 \ |
161 | $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ | |
aa55c8e2 | 162 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 | 163 | |
3812b8c5 | 164 | else # sub-make-done |
1da177e4 | 165 | # We process the rest of the Makefile if this is the final invocation of make |
1da177e4 | 166 | |
7ff52571 MY |
167 | # Do not print "Entering directory ...", |
168 | # but we want to display it when entering to the output directory | |
169 | # so that IDEs/editors are able to understand relative filenames. | |
170 | MAKEFLAGS += --no-print-directory | |
171 | ||
aa55c8e2 MY |
172 | # Call a source code checker (by default, "sparse") as part of the |
173 | # C compilation. | |
174 | # | |
175 | # Use 'make C=1' to enable checking of only re-compiled files. | |
176 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
177 | # of whether they are re-compiled or not. | |
178 | # | |
036db11c C |
179 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
180 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
181 | |
182 | ifeq ("$(origin C)", "command line") | |
183 | KBUILD_CHECKSRC = $(C) | |
184 | endif | |
185 | ifndef KBUILD_CHECKSRC | |
186 | KBUILD_CHECKSRC = 0 | |
187 | endif | |
188 | ||
189 | # Use make M=dir to specify directory of external module to build | |
190 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
191 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
192 | ifdef SUBDIRS | |
0126be38 MY |
193 | $(warning ================= WARNING ================) |
194 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
195 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
196 | $(warning ==========================================) | |
aa55c8e2 MY |
197 | KBUILD_EXTMOD ?= $(SUBDIRS) |
198 | endif | |
199 | ||
200 | ifeq ("$(origin M)", "command line") | |
201 | KBUILD_EXTMOD := $(M) | |
202 | endif | |
203 | ||
9da0763b MM |
204 | ifeq ($(KBUILD_SRC),) |
205 | # building in the source tree | |
206 | srctree := . | |
207 | else | |
208 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
209 | # building in a subdirectory of the source tree | |
210 | srctree := .. | |
211 | else | |
212 | srctree := $(KBUILD_SRC) | |
213 | endif | |
214 | endif | |
2c1f4f12 MY |
215 | |
216 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
217 | ||
7e1c0477 | 218 | objtree := . |
1da177e4 LT |
219 | src := $(srctree) |
220 | obj := $(objtree) | |
221 | ||
6b12de69 | 222 | VPATH := $(srctree) |
1da177e4 | 223 | |
11294235 | 224 | export srctree objtree VPATH |
1da177e4 | 225 | |
2c1f4f12 MY |
226 | # To make sure we do not include .config for any of the *config targets |
227 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
228 | # It is allowed to specify more targets when calling make, including | |
229 | # mixing *config targets and build targets. | |
230 | # For example 'make oldconfig all'. | |
231 | # Detect when mixed targets is specified, and make a second invocation | |
232 | # of make so .config is not included in this case either (for *config). | |
233 | ||
234 | version_h := include/generated/uapi/linux/version.h | |
235 | old_version_h := include/linux/version.h | |
236 | ||
22340a06 MY |
237 | clean-targets := %clean mrproper cleandocs |
238 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 MY |
239 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
240 | $(version_h) headers_% archheaders archscripts \ | |
63e31a67 | 241 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
242 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
243 | kernelrelease | |
2c1f4f12 | 244 | |
d7942413 MY |
245 | config-targets := 0 |
246 | mixed-targets := 0 | |
247 | dot-config := 1 | |
248 | may-sync-config := 1 | |
2c1f4f12 MY |
249 | |
250 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
251 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
252 | dot-config := 0 | |
253 | endif | |
254 | endif | |
255 | ||
d7942413 MY |
256 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
257 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
258 | may-sync-config := 0 | |
259 | endif | |
260 | endif | |
261 | ||
262 | ifneq ($(KBUILD_EXTMOD),) | |
263 | may-sync-config := 0 | |
264 | endif | |
265 | ||
2c1f4f12 MY |
266 | ifeq ($(KBUILD_EXTMOD),) |
267 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
268 | config-targets := 1 | |
269 | ifneq ($(words $(MAKECMDGOALS)),1) | |
270 | mixed-targets := 1 | |
271 | endif | |
272 | endif | |
273 | endif | |
22340a06 MY |
274 | |
275 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
276 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
277 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
278 | mixed-targets := 1 | |
279 | endif | |
280 | endif | |
281 | ||
2c1f4f12 MY |
282 | # install and modules_install need also be processed one by one |
283 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
284 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
285 | mixed-targets := 1 | |
286 | endif | |
287 | endif | |
288 | ||
289 | ifeq ($(mixed-targets),1) | |
290 | # =========================================================================== | |
291 | # We're called with mixed targets (*config and build targets). | |
292 | # Handle them one by one. | |
293 | ||
294 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
295 | ||
296 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
297 | @: | |
298 | ||
299 | __build_one_by_one: | |
300 | $(Q)set -e; \ | |
301 | for i in $(MAKECMDGOALS); do \ | |
302 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
303 | done | |
304 | ||
305 | else | |
306 | ||
2c1f4f12 MY |
307 | include scripts/Kbuild.include |
308 | ||
309 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
310 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
311 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
312 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
313 | ||
b2d35fa5 | 314 | include scripts/subarch.include |
1da177e4 LT |
315 | |
316 | # Cross compiling and selecting different set of gcc/bin-utils | |
317 | # --------------------------------------------------------------------------- | |
318 | # | |
319 | # When performing cross compilation for other architectures ARCH shall be set | |
320 | # to the target architecture. (See arch/* for the possibilities). | |
321 | # ARCH can be set during invocation of make: | |
322 | # make ARCH=ia64 | |
323 | # Another way is to have ARCH set in the environment. | |
324 | # The default ARCH is the host where make is executed. | |
325 | ||
326 | # CROSS_COMPILE specify the prefix used for all executables used | |
327 | # during compilation. Only gcc and related bin-utils executables | |
328 | # are prefixed with $(CROSS_COMPILE). | |
329 | # CROSS_COMPILE can be set on the command line | |
330 | # make CROSS_COMPILE=ia64-linux- | |
331 | # Alternatively CROSS_COMPILE can be set in the environment. | |
332 | # Default value for CROSS_COMPILE is not to prefix executables | |
333 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 334 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
335 | |
336 | # Architecture as present in compile.h | |
6752ed90 TG |
337 | UTS_MACHINE := $(ARCH) |
338 | SRCARCH := $(ARCH) | |
1da177e4 | 339 | |
d746d647 SR |
340 | # Additional ARCH settings for x86 |
341 | ifeq ($(ARCH),i386) | |
342 | SRCARCH := x86 | |
343 | endif | |
344 | ifeq ($(ARCH),x86_64) | |
345 | SRCARCH := x86 | |
346 | endif | |
74b469f2 | 347 | |
5e538790 | 348 | # Additional ARCH settings for sparc |
e69f58c0 NK |
349 | ifeq ($(ARCH),sparc32) |
350 | SRCARCH := sparc | |
351 | endif | |
a439fe51 | 352 | ifeq ($(ARCH),sparc64) |
5e538790 | 353 | SRCARCH := sparc |
a439fe51 | 354 | endif |
2fb9b1bd | 355 | |
3cc000b5 PM |
356 | # Additional ARCH settings for sh |
357 | ifeq ($(ARCH),sh64) | |
358 | SRCARCH := sh | |
359 | endif | |
360 | ||
14cdd3c4 | 361 | KCONFIG_CONFIG ?= .config |
41263fc6 | 362 | export KCONFIG_CONFIG |
14cdd3c4 | 363 | |
1da177e4 LT |
364 | # SHELL used by kbuild |
365 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
366 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
367 | else echo sh; fi ; fi) | |
368 | ||
6d79a7b4 MY |
369 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
370 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
371 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 372 | |
070b98bf SR |
373 | HOSTCC = gcc |
374 | HOSTCXX = g++ | |
96f14fe7 | 375 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
376 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
377 | $(HOSTCFLAGS) | |
378 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
379 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
380 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 381 | |
1da177e4 | 382 | # Make variables (CC, etc...) |
1da177e4 LT |
383 | AS = $(CROSS_COMPILE)as |
384 | LD = $(CROSS_COMPILE)ld | |
385 | CC = $(CROSS_COMPILE)gcc | |
386 | CPP = $(CC) -E | |
387 | AR = $(CROSS_COMPILE)ar | |
388 | NM = $(CROSS_COMPILE)nm | |
389 | STRIP = $(CROSS_COMPILE)strip | |
390 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
391 | OBJDUMP = $(CROSS_COMPILE)objdump | |
73a4f6db MY |
392 | LEX = flex |
393 | YACC = bison | |
1da177e4 | 394 | AWK = awk |
caa27b66 | 395 | INSTALLKERNEL := installkernel |
1da177e4 | 396 | DEPMOD = /sbin/depmod |
1da177e4 | 397 | PERL = perl |
011bf125 | 398 | PYTHON = python |
e9781b52 MY |
399 | PYTHON2 = python2 |
400 | PYTHON3 = python3 | |
1da177e4 LT |
401 | CHECK = sparse |
402 | ||
80a7d1d9 | 403 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 404 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
b36fad65 | 405 | NOSTDINC_FLAGS = |
6588169d SR |
406 | CFLAGS_MODULE = |
407 | AFLAGS_MODULE = | |
408 | LDFLAGS_MODULE = | |
1da177e4 LT |
409 | CFLAGS_KERNEL = |
410 | AFLAGS_KERNEL = | |
b36fad65 | 411 | LDFLAGS_vmlinux = |
1da177e4 | 412 | |
abbf1590 DH |
413 | # Use USERINCLUDE when you must reference the UAPI directories only. |
414 | USERINCLUDE := \ | |
9d022c54 MY |
415 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
416 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 417 | -I$(srctree)/include/uapi \ |
3308b285 | 418 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
419 | -include $(srctree)/include/linux/kconfig.h |
420 | ||
1da177e4 LT |
421 | # Use LINUXINCLUDE when you must reference the include/ directory. |
422 | # Needed to be compatible with the O= option | |
abbf1590 | 423 | LINUXINCLUDE := \ |
9d022c54 MY |
424 | -I$(srctree)/arch/$(SRCARCH)/include \ |
425 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
abbf1590 | 426 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
f8224f7f MY |
427 | -I$(objtree)/include \ |
428 | $(USERINCLUDE) | |
1da177e4 | 429 | |
42a92bcc | 430 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 431 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 432 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 433 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 434 | -Wno-format-security \ |
433dc2eb MY |
435 | -std=gnu89 |
436 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
437 | KBUILD_AFLAGS_KERNEL := |
438 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
439 | KBUILD_AFLAGS_MODULE := -DMODULE |
440 | KBUILD_CFLAGS_MODULE := -DMODULE | |
441 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
d503ac53 | 442 | KBUILD_LDFLAGS := |
433dc2eb | 443 | GCC_PLUGINS_CFLAGS := |
1da177e4 | 444 | |
96f14fe7 | 445 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
8377bd2b | 446 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
88110713 | 447 | export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
10844aeb | 448 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 449 | |
d503ac53 | 450 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
451 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
452 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 453 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 454 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 455 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 456 | export KBUILD_ARFLAGS |
1da177e4 LT |
457 | |
458 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
459 | # tree rather than in the kernel tree. The kernel tree might | |
460 | # even be read-only. | |
461 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
462 | ||
1da177e4 LT |
463 | # Files to ignore in find ... statements |
464 | ||
ae63b2d7 PB |
465 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
466 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
467 | -prune -o | |
450c6076 JJ |
468 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
469 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
470 | |
471 | # =========================================================================== | |
472 | # Rules shared between *config targets and build targets | |
473 | ||
312a3d09 | 474 | # Basic helpers built in scripts/basic/ |
4f193362 | 475 | PHONY += scripts_basic |
1da177e4 LT |
476 | scripts_basic: |
477 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 478 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 479 | |
4f193362 | 480 | PHONY += outputmakefile |
fd5f0cd6 JB |
481 | # outputmakefile generates a Makefile in the output directory, if using a |
482 | # separate output directory. This allows convenient use of make in the | |
483 | # output directory. | |
3a51ff34 VK |
484 | # At the same time when output Makefile generated, generate .gitignore to |
485 | # ignore whole output directory | |
1da177e4 | 486 | outputmakefile: |
fd5f0cd6 | 487 | ifneq ($(KBUILD_SRC),) |
92979997 | 488 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 489 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
3a51ff34 | 490 | $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
fd5f0cd6 | 491 | endif |
1da177e4 | 492 | |
99516742 | 493 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 494 | ifneq ($(CROSS_COMPILE),) |
238bcbc4 | 495 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 496 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
238bcbc4 | 497 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
ef8c4ed9 | 498 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
499 | endif |
500 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 501 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 502 | endif |
238bcbc4 MY |
503 | CLANG_FLAGS += -no-integrated-as |
504 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
505 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 506 | export CLANG_FLAGS |
ae6b289a CF |
507 | endif |
508 | ||
d5028ba8 | 509 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
2e549b2e | 510 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
d5028ba8 | 511 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
2e549b2e | 512 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
d5028ba8 | 513 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
2e549b2e | 514 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
d5028ba8 | 515 | export RETPOLINE_CFLAGS |
2e549b2e | 516 | export RETPOLINE_VDSO_CFLAGS |
d5028ba8 | 517 | |
315bab4e MY |
518 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
519 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
520 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
521 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
522 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) | |
523 | ||
1da177e4 LT |
524 | ifeq ($(config-targets),1) |
525 | # =========================================================================== | |
526 | # *config targets only - make sure prerequisites are updated, and descend | |
527 | # in scripts/kconfig to make the *config target | |
528 | ||
529 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
530 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
531 | # used for 'make defconfig' | |
a436bb7b | 532 | include arch/$(SRCARCH)/Makefile |
315bab4e | 533 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 534 | |
31110ebb | 535 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
536 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
537 | ||
538 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
539 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
540 | ||
541 | else | |
542 | # =========================================================================== | |
543 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
544 | # targets and others. In general all targets except *config targets. | |
545 | ||
2c1f4f12 MY |
546 | # If building an external module we do not care about the all: rule |
547 | # but instead _all depend on modules | |
548 | PHONY += all | |
549 | ifeq ($(KBUILD_EXTMOD),) | |
550 | _all: all | |
551 | else | |
552 | _all: modules | |
553 | endif | |
554 | ||
555 | # Decide whether to build built-in, modular, or both. | |
556 | # Normally, just do built-in. | |
557 | ||
558 | KBUILD_MODULES := | |
559 | KBUILD_BUILTIN := 1 | |
560 | ||
561 | # If we have only "make modules", don't compile built-in objects. | |
562 | # When we're building modules with modversions, we need to consider | |
563 | # the built-in objects during the descend as well, in order to | |
564 | # make sure the checksums are up to date before we record them. | |
565 | ||
566 | ifeq ($(MAKECMDGOALS),modules) | |
567 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
568 | endif | |
569 | ||
570 | # If we have "make <whatever> modules", compile modules | |
571 | # in addition to whatever we do anyway. | |
572 | # Just "make" or "make all" shall build modules as well | |
573 | ||
574 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
575 | KBUILD_MODULES := 1 | |
576 | endif | |
577 | ||
578 | ifeq ($(MAKECMDGOALS),) | |
579 | KBUILD_MODULES := 1 | |
580 | endif | |
581 | ||
582 | export KBUILD_MODULES KBUILD_BUILTIN | |
583 | ||
1da177e4 | 584 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
585 | # Objects we will link into vmlinux / subdirs we need to visit |
586 | init-y := init/ | |
f96182e9 | 587 | drivers-y := drivers/ sound/ |
1da177e4 LT |
588 | net-y := net/ |
589 | libs-y := lib/ | |
590 | core-y := usr/ | |
37d9fe47 | 591 | virt-y := virt/ |
1da177e4 LT |
592 | endif # KBUILD_EXTMOD |
593 | ||
594 | ifeq ($(dot-config),1) | |
0a16d2e8 | 595 | include include/config/auto.conf |
315bab4e MY |
596 | endif |
597 | ||
598 | # The all: target is the default when no target is given on the | |
599 | # command line. | |
600 | # This allow a user to issue only 'make' to build a kernel including modules | |
601 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
602 | all: vmlinux | |
603 | ||
604 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
605 | $(call cc-option,-fno-tree-loop-im) \ | |
606 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 607 | export CFLAGS_GCOV |
315bab4e | 608 | |
b1f4ff74 PZ |
609 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
610 | ifdef CONFIG_FUNCTION_TRACER | |
611 | CC_FLAGS_FTRACE := -pg | |
612 | endif | |
613 | ||
315bab4e MY |
614 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
615 | # values of the respective KBUILD_* variables | |
616 | ARCH_CPPFLAGS := | |
617 | ARCH_AFLAGS := | |
618 | ARCH_CFLAGS := | |
619 | include arch/$(SRCARCH)/Makefile | |
1da177e4 | 620 | |
315bab4e | 621 | ifeq ($(dot-config),1) |
d7942413 | 622 | ifeq ($(may-sync-config),1) |
315bab4e MY |
623 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
624 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
625 | # because some architectures define CROSS_COMPILE there. | |
c955ccaf | 626 | -include include/config/auto.conf.cmd |
1da177e4 | 627 | |
05850719 MY |
628 | $(KCONFIG_CONFIG): |
629 | @echo >&2 '***' | |
630 | @echo >&2 '*** Configuration file "$@" not found!' | |
631 | @echo >&2 '***' | |
632 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
633 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
634 | @echo >&2 '***' | |
635 | @/bin/false | |
1da177e4 | 636 | |
61277981 UM |
637 | # The actual configuration files used during the build are stored in |
638 | # include/generated/ and include/config/. Update them if .config is newer than | |
639 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
640 | # |
641 | # This exploits the 'multi-target pattern rule' trick. | |
642 | # The syncconfig should be executed only once to make all the targets. | |
643 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
911a91c3 | 644 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
3041e47e | 645 | else |
d7942413 MY |
646 | # External modules and some install targets need include/generated/autoconf.h |
647 | # and include/config/auto.conf but do not care if they are up-to-date. | |
648 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
649 | PHONY += include/config/auto.conf |
650 | ||
651 | include/config/auto.conf: | |
264a2683 | 652 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
653 | echo >&2; \ |
654 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
655 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
656 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
657 | echo >&2 ; \ | |
9ee4e336 SR |
658 | /bin/false) |
659 | ||
d7942413 | 660 | endif # may-sync-config |
9ee4e336 | 661 | endif # $(dot-config) |
1da177e4 | 662 | |
a1c48bb1 | 663 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 664 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
665 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
666 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
667 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
a1c48bb1 | 668 | |
1da177e4 | 669 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
6748cb3c | 670 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
815eb71e AB |
671 | else |
672 | KBUILD_CFLAGS += -O2 | |
673 | endif | |
1da177e4 | 674 | |
b303c6df MY |
675 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED |
676 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
677 | endif | |
a76bcf55 | 678 | |
69102311 JK |
679 | # Tell gcc to never replace conditional load with a non-conditional one |
680 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
681 | ||
d677a4d6 | 682 | include scripts/Makefile.kcov |
6b90bd4b ER |
683 | include scripts/Makefile.gcc-plugins |
684 | ||
1873e870 AK |
685 | ifdef CONFIG_READABLE_ASM |
686 | # Disable optimizations that make assembler listings hard to read. | |
687 | # reorder blocks reorders the control in the function | |
688 | # ipa clone creates specialized cloned functions | |
689 | # partial inlining inlines only parts of functions | |
690 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
691 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
692 | $(call cc-option,-fno-partial-inlining) | |
693 | endif | |
694 | ||
08f67461 | 695 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
696 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
697 | endif | |
698 | ||
2a61f474 | 699 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
700 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
701 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
702 | |
703 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 704 | |
076f421d | 705 | ifdef CONFIG_CC_IS_CLANG |
cfe17c9b | 706 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
cfe17c9b MY |
707 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
708 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
709 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
710 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
711 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
712 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
713 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
714 | # See modpost pattern 2 | |
715 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
716 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
cfe17c9b MY |
717 | else |
718 | ||
719 | # These warnings generated too much noise in a regular build. | |
720 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 721 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
cfe17c9b MY |
722 | endif |
723 | ||
0a5f4176 | 724 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 725 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 726 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 727 | else |
7e9501fd RV |
728 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
729 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
730 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
731 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
732 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
733 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 734 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 735 | endif |
7e9501fd | 736 | endif |
1da177e4 | 737 | |
1e88e415 | 738 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 739 | |
1da177e4 | 740 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 741 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 742 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 743 | else |
1e88e415 | 744 | DEBUG_CFLAGS += -g |
866ced95 | 745 | endif |
2288328c | 746 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 747 | endif |
bfaf2dd3 | 748 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 749 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 750 | endif |
1da177e4 | 751 | |
d6f4ceb7 | 752 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 753 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 754 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
755 | endif |
756 | ||
1e88e415 MY |
757 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
758 | export DEBUG_CFLAGS | |
759 | ||
606576ce | 760 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
761 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
762 | # gcc 5 supports generating the mcount tables directly | |
763 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
764 | CC_FLAGS_FTRACE += -mrecord-mcount | |
765 | export CC_USING_RECORD_MCOUNT := 1 | |
766 | endif | |
2f4df001 VG |
767 | ifdef CONFIG_HAVE_NOP_MCOUNT |
768 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
769 | CC_FLAGS_FTRACE += -mnop-mcount | |
770 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
771 | endif | |
772 | endif | |
07d04081 | 773 | endif |
a2546fae | 774 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
775 | ifeq ($(call cc-option-yn, -mfentry),y) |
776 | CC_FLAGS_FTRACE += -mfentry | |
777 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
778 | endif | |
a2546fae | 779 | endif |
f28bc3c3 VG |
780 | export CC_FLAGS_FTRACE |
781 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
782 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 783 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 784 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
785 | BUILD_C_RECORDMCOUNT := y |
786 | export BUILD_C_RECORDMCOUNT | |
787 | endif | |
788 | endif | |
16444a8a ACM |
789 | endif |
790 | ||
91341d4b SR |
791 | # We trigger additional mismatches with less inlining |
792 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
793 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
794 | endif | |
795 | ||
90ad4052 | 796 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
797 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
798 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
799 | endif |
800 | ||
e8e69931 | 801 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 802 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 803 | |
1da177e4 | 804 | # warn about C99 declaration after statement |
a33e7ae2 | 805 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 806 | |
0bb95f80 KC |
807 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
808 | KBUILD_CFLAGS += $(call cc-option,-Wvla) | |
809 | ||
070b98bf | 810 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 811 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 812 | |
217c3e01 SR |
813 | # disable stringop warnings in gcc 8+ |
814 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
815 | ||
fe8d0a41 | 816 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 817 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 818 | |
87e0d4f0 DB |
819 | # clang sets -fmerge-all-constants by default as optimization, but this |
820 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
821 | # need to disable it here generally. | |
822 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
823 | ||
824 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
825 | # to have actual conforming behavior enabled. | |
826 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
827 | ||
3ce120b1 LT |
828 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
829 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
830 | ||
8f7f5c9f AK |
831 | # conserve stack if available |
832 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
833 | ||
fe7c36c7 JT |
834 | # Prohibit date/time macros, which would make the build non-deterministic |
835 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
836 | ||
ea8daa7b DW |
837 | # enforce correct pointer usage |
838 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
839 | ||
c834f0e8 KC |
840 | # Require designated initializers for all marked structures |
841 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
842 | ||
a73619a8 MY |
843 | # change __FILE__ to the relative path from the srctree |
844 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
845 | ||
40df759e MM |
846 | # use the deterministic mode of AR if available |
847 | KBUILD_ARFLAGS := $(call ar-option,D) | |
848 | ||
a436bb7b MY |
849 | include scripts/Makefile.kasan |
850 | include scripts/Makefile.extrawarn | |
c6d30853 | 851 | include scripts/Makefile.ubsan |
a86fe353 | 852 | |
61754c18 MM |
853 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
854 | # last assignments | |
855 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
856 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
857 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 858 | |
18991197 | 859 | # Use --build-id when available. |
0da4fabd | 860 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
6588169d | 861 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
862 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
863 | ||
5d7d18f5 | 864 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 865 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
866 | endif |
867 | ||
14516765 LVO |
868 | # insure the checker run with the right endianness |
869 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
870 | ||
1f2f01b1 LVO |
871 | # the checker needs the correct machine size |
872 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
873 | ||
1da177e4 | 874 | # Default kernel image to build when no specific target is given. |
070b98bf | 875 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
876 | # set in the environment |
877 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
878 | # this default value | |
879 | export KBUILD_IMAGE ?= vmlinux | |
880 | ||
881 | # | |
882 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
883 | # images. Default is /boot, but you can set it to other values | |
884 | export INSTALL_PATH ?= /boot | |
885 | ||
f4d4ffc0 JC |
886 | # |
887 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
888 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
889 | # an argument if needed. Otherwise it defaults to the kernel install path | |
890 | # | |
891 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
892 | ||
1da177e4 LT |
893 | # |
894 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
895 | # relocations required by build roots. This is not defined in the | |
070b98bf | 896 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
897 | # |
898 | ||
df9df036 | 899 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
900 | export MODLIB |
901 | ||
ac031f26 | 902 | # |
3fbb43df MY |
903 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
904 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
905 | # the default option --strip-debug will be used. Otherwise, | |
906 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 907 | |
ac031f26 TT |
908 | ifdef INSTALL_MOD_STRIP |
909 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 910 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 911 | else |
2ea03891 | 912 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
913 | endif # INSTALL_MOD_STRIP=1 |
914 | else | |
2ea03891 | 915 | mod_strip_cmd = true |
ac031f26 TT |
916 | endif # INSTALL_MOD_STRIP |
917 | export mod_strip_cmd | |
918 | ||
beb50df3 BJ |
919 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
920 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
921 | # or CONFIG_MODULE_COMPRESS_XZ. | |
922 | ||
923 | mod_compress_cmd = true | |
924 | ifdef CONFIG_MODULE_COMPRESS | |
925 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 926 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
927 | endif # CONFIG_MODULE_COMPRESS_GZIP |
928 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 929 | mod_compress_cmd = xz -f |
beb50df3 BJ |
930 | endif # CONFIG_MODULE_COMPRESS_XZ |
931 | endif # CONFIG_MODULE_COMPRESS | |
932 | export mod_compress_cmd | |
933 | ||
d9d8d7ed | 934 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
935 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
936 | ||
937 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
938 | else |
939 | mod_sign_cmd = true | |
940 | endif | |
941 | export mod_sign_cmd | |
942 | ||
9f0c18ae JP |
943 | ifdef CONFIG_STACK_VALIDATION |
944 | has_libelf := $(call try-run,\ | |
945 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) | |
946 | ifeq ($(has_libelf),1) | |
947 | objtool_target := tools/objtool FORCE | |
948 | else | |
9f0c18ae JP |
949 | SKIP_STACK_VALIDATION := 1 |
950 | export SKIP_STACK_VALIDATION | |
951 | endif | |
952 | endif | |
953 | ||
e00d8880 | 954 | PHONY += prepare0 |
e2a666d5 | 955 | |
1da177e4 | 956 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 957 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
958 | |
959 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
960 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 961 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 LT |
962 | |
963 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
37d9fe47 | 964 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
1da177e4 | 965 | |
f49821ee NP |
966 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
967 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
968 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
969 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 970 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
971 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
972 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 973 | |
1f2bfbd0 | 974 | # Externally visible symbols (used by link-vmlinux.sh) |
d151e971 MY |
975 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
976 | $(drivers-y) $(net-y) $(virt-y) | |
3a166fc2 | 977 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
95698570 | 978 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 979 | export LDFLAGS_vmlinux |
312a3d09 | 980 | # used by scripts/package/Makefile |
37d9fe47 | 981 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
9bb48247 | 982 | |
d151e971 | 983 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 984 | |
3fdc7d3f MY |
985 | # Recurse until adjust_autoksyms.sh is satisfied |
986 | PHONY += autoksyms_recursive | |
987 | autoksyms_recursive: $(vmlinux-deps) | |
2441e78b | 988 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
ba79d401 | 989 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 990 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 991 | endif |
23121ca2 | 992 | |
1f50b80a MY |
993 | # For the kernel to actually contain only the needed exported symbols, |
994 | # we have to build modules as well to determine what those symbols are. | |
995 | # (this can be evaluated only once include/config/auto.conf has been included) | |
996 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
997 | KBUILD_MODULES := 1 | |
998 | endif | |
999 | ||
07a422bb MY |
1000 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1001 | ||
1002 | $(autoksyms_h): | |
1003 | $(Q)mkdir -p $(dir $@) | |
1004 | $(Q)touch $@ | |
23121ca2 | 1005 | |
fbe6e37d NP |
1006 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1007 | ||
1008 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1009 | cmd_link-vmlinux = \ |
d503ac53 | 1010 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1011 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1012 | |
3fdc7d3f | 1013 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1014 | +$(call if_changed,link-vmlinux) |
741f98fe | 1015 | |
392885ee MY |
1016 | targets := vmlinux |
1017 | ||
3fca1700 | 1018 | # Build samples along the rest of the kernel. This needs headers_install. |
dd92478a NP |
1019 | ifdef CONFIG_SAMPLES |
1020 | vmlinux-dirs += samples | |
3fca1700 | 1021 | samples: headers_install |
dd92478a NP |
1022 | endif |
1023 | ||
38385f8f | 1024 | # The actual objects are generated when descending, |
1da177e4 | 1025 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1026 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1027 | |
1028 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1029 | # Preset locale variables to speed up the build process. Limit locale | |
1030 | # tweaks to this spot to avoid wrong language settings when running | |
1031 | # make menuconfig etc. | |
1032 | # Error messages still appears in the original language | |
1033 | ||
4f193362 | 1034 | PHONY += $(vmlinux-dirs) |
059bc9fc | 1035 | $(vmlinux-dirs): prepare |
f7adc312 | 1036 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
1da177e4 | 1037 | |
ba97df45 | 1038 | filechk_kernel.release = \ |
0d0e7718 | 1039 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1040 | |
83a35e36 | 1041 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
2063945f | 1042 | include/config/kernel.release: $(srctree)/Makefile FORCE |
0d0e7718 | 1043 | $(call filechk,kernel.release) |
cb58455c | 1044 | |
d8821622 MY |
1045 | # Additional helpers built in scripts/ |
1046 | # Carefully list dependencies so we do not try to build scripts twice | |
1047 | # in parallel | |
1048 | PHONY += scripts | |
60df1aee | 1049 | scripts: scripts_basic scripts_dtc |
d8821622 | 1050 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1051 | |
1da177e4 | 1052 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1053 | # or the modules are listed in "prepare". |
1054 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1055 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1056 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1057 | |
4f1c1008 | 1058 | PHONY += prepare archprepare prepare1 prepare3 |
5bb78269 | 1059 | |
86feeaa8 | 1060 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1061 | # and if so do: |
1062 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1063 | prepare3: include/config/kernel.release |
1da177e4 | 1064 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 1065 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 1066 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
1067 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
1068 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
1069 | /bin/false; \ |
1070 | fi; | |
1da177e4 LT |
1071 | endif |
1072 | ||
4f1c1008 MY |
1073 | prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ |
1074 | include/generated/utsrelease.h | |
7bb9d092 | 1075 | $(cmd_crmodverdir) |
1da177e4 | 1076 | |
668c35f6 | 1077 | archprepare: archheaders archscripts prepare1 scripts |
5bb78269 | 1078 | |
65bba042 | 1079 | prepare0: archprepare |
60df1aee | 1080 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1081 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1082 | |
1da177e4 | 1083 | # All the preparing.. |
b9ab5ebb JP |
1084 | prepare: prepare0 prepare-objtool |
1085 | ||
2c1f4f12 | 1086 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1087 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1088 | ||
2c1f4f12 MY |
1089 | PHONY += asm-generic uapi-asm-generic |
1090 | asm-generic: uapi-asm-generic | |
7d0e5c20 | 1091 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm |
2c1f4f12 | 1092 | uapi-asm-generic: |
7d0e5c20 | 1093 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm |
2c1f4f12 | 1094 | |
b9ab5ebb | 1095 | PHONY += prepare-objtool |
3b27a0c8 | 1096 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1097 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1098 | ifdef CONFIG_UNWINDER_ORC | |
1099 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1100 | @false | |
1101 | else | |
1102 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1103 | endif | |
1104 | endif | |
1da177e4 | 1105 | |
1da177e4 LT |
1106 | # Generate some files |
1107 | # --------------------------------------------------------------------------- | |
1108 | ||
1109 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1110 | # needs to be updated, so this check is forced on all builds | |
1111 | ||
1112 | uts_len := 64 | |
63104eec SR |
1113 | define filechk_utsrelease.h |
1114 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1115 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1116 | exit 1; \ | |
1117 | fi; \ | |
ad774086 | 1118 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1119 | endef |
1da177e4 LT |
1120 | |
1121 | define filechk_version.h | |
ad774086 | 1122 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1123 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1124 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1125 | endef |
1126 | ||
43fee2b2 | 1127 | $(version_h): FORCE |
1da177e4 | 1128 | $(call filechk,version.h) |
223c24a7 | 1129 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1130 | |
273b281f | 1131 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1132 | $(call filechk,utsrelease.h) |
1133 | ||
179efcb4 VN |
1134 | PHONY += headerdep |
1135 | headerdep: | |
9663d989 PF |
1136 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1137 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1138 | |
8d730cfb DW |
1139 | # --------------------------------------------------------------------------- |
1140 | # Kernel headers | |
8d730cfb | 1141 | |
e6883b18 SR |
1142 | #Default location for installed headers |
1143 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1144 | |
9d022c54 MY |
1145 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
1146 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
e6883b18 | 1147 | |
f7de64b7 | 1148 | PHONY += archheaders archscripts |
6520fe55 | 1149 | |
e6883b18 | 1150 | PHONY += __headers |
a9d9a400 | 1151 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
e1b702cf | 1152 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1153 | |
1154 | PHONY += headers_install_all | |
2fb9b1bd SR |
1155 | headers_install_all: |
1156 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1157 | |
8d730cfb | 1158 | PHONY += headers_install |
e6883b18 | 1159 | headers_install: __headers |
9d022c54 | 1160 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1161 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
a8ff49a1 | 1162 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
9d022c54 | 1163 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
8d730cfb | 1164 | |
1f85712e MF |
1165 | PHONY += headers_check_all |
1166 | headers_check_all: headers_install_all | |
2fb9b1bd | 1167 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1168 | |
68475359 DW |
1169 | PHONY += headers_check |
1170 | headers_check: headers_install | |
a8ff49a1 | 1171 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
9d022c54 | 1172 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
68475359 | 1173 | |
257edce6 MY |
1174 | ifdef CONFIG_HEADERS_CHECK |
1175 | all: headers_check | |
1176 | endif | |
1177 | ||
5a5da78b SK |
1178 | # --------------------------------------------------------------------------- |
1179 | # Kernel selftest | |
1180 | ||
1181 | PHONY += kselftest | |
1182 | kselftest: | |
2bc84526 | 1183 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1184 | |
801d2e9f | 1185 | PHONY += kselftest-clean |
dcb825a9 | 1186 | kselftest-clean: |
2bc84526 | 1187 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1188 | |
3d6dee7a BJZ |
1189 | PHONY += kselftest-merge |
1190 | kselftest-merge: | |
1191 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1192 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1193 | -m $(objtree)/.config \ | |
1194 | $(srctree)/tools/testing/selftests/*/config | |
1195 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1196 | ||
37c8a5fa RH |
1197 | # --------------------------------------------------------------------------- |
1198 | # Devicetree files | |
1199 | ||
1200 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1201 | dtstree := arch/$(SRCARCH)/boot/dts | |
1202 | endif | |
1203 | ||
1204 | ifneq ($(dtstree),) | |
1205 | ||
1206 | %.dtb: prepare3 scripts_dtc | |
1207 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1208 | ||
4f0e3a57 RH |
1209 | PHONY += dtbs dtbs_install dt_binding_check |
1210 | dtbs dtbs_check: prepare3 scripts_dtc | |
37c8a5fa RH |
1211 | $(Q)$(MAKE) $(build)=$(dtstree) |
1212 | ||
4f0e3a57 RH |
1213 | dtbs_check: export CHECK_DTBS=1 |
1214 | dtbs_check: dt_binding_check | |
1215 | ||
37c8a5fa RH |
1216 | dtbs_install: |
1217 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1218 | ||
1219 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1220 | all: dtbs | |
1221 | endif | |
1222 | ||
1223 | endif | |
1224 | ||
1225 | PHONY += scripts_dtc | |
1226 | scripts_dtc: scripts_basic | |
1227 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1228 | ||
4f0e3a57 RH |
1229 | dt_binding_check: scripts_dtc |
1230 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1231 | ||
1da177e4 LT |
1232 | # --------------------------------------------------------------------------- |
1233 | # Modules | |
1234 | ||
1235 | ifdef CONFIG_MODULES | |
1236 | ||
070b98bf | 1237 | # By default, build modules as well |
1da177e4 | 1238 | |
73d1393e | 1239 | all: modules |
1da177e4 | 1240 | |
3fbb43df | 1241 | # Build modules |
551559e1 | 1242 | # |
3fbb43df MY |
1243 | # A module can be listed more than once in obj-m resulting in |
1244 | # duplicate lines in modules.order files. Those are removed | |
1245 | # using awk while concatenating to the final file. | |
1da177e4 | 1246 | |
4f193362 | 1247 | PHONY += modules |
2da30e70 | 1248 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1249 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1250 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1251 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1252 | |
a6c36632 MM |
1253 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1254 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1255 | ||
2063945f | 1256 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
a6c36632 MM |
1257 | $(Q)$(MAKE) $(modbuiltin)=$* |
1258 | ||
1da177e4 LT |
1259 | |
1260 | # Target to prepare building external modules | |
4f193362 | 1261 | PHONY += modules_prepare |
059bc9fc | 1262 | modules_prepare: prepare |
1da177e4 LT |
1263 | |
1264 | # Target to install modules | |
4f193362 | 1265 | PHONY += modules_install |
1da177e4 LT |
1266 | modules_install: _modinst_ _modinst_post |
1267 | ||
4f193362 | 1268 | PHONY += _modinst_ |
2da30e70 | 1269 | _modinst_: |
1da177e4 LT |
1270 | @rm -rf $(MODLIB)/kernel |
1271 | @rm -f $(MODLIB)/source | |
1272 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1273 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1274 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1275 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1276 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1277 | fi |
551559e1 | 1278 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1279 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1280 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1281 | |
50a8ec31 | 1282 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1283 | # boot a modules.dep even before / is mounted read-write. However the |
1284 | # boot script depmod is the master version. | |
4f193362 | 1285 | PHONY += _modinst_post |
6d128e1e | 1286 | _modinst_post: _modinst_ |
50a8ec31 | 1287 | $(call cmd,depmod) |
1da177e4 | 1288 | |
d890f510 JB |
1289 | ifeq ($(CONFIG_MODULE_SIG), y) |
1290 | PHONY += modules_sign | |
1291 | modules_sign: | |
1292 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1293 | endif | |
1294 | ||
1da177e4 LT |
1295 | else # CONFIG_MODULES |
1296 | ||
1297 | # Modules not configured | |
1298 | # --------------------------------------------------------------------------- | |
1299 | ||
612e47ce MY |
1300 | PHONY += modules modules_install |
1301 | modules modules_install: | |
5369f550 MM |
1302 | @echo >&2 |
1303 | @echo >&2 "The present kernel configuration has modules disabled." | |
1304 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1305 | @echo >&2 "Then build a kernel with module support enabled." | |
1306 | @echo >&2 | |
1da177e4 LT |
1307 | @exit 1 |
1308 | ||
1309 | endif # CONFIG_MODULES | |
1310 | ||
1da177e4 LT |
1311 | ### |
1312 | # Cleaning is done on three levels. | |
1313 | # make clean Delete most generated files | |
1314 | # Leave enough to build external modules | |
1315 | # make mrproper Delete the current configuration, and all generated files | |
1316 | # make distclean Remove editor backup files, patch leftover files and the like | |
1317 | ||
1318 | # Directories & files removed with 'make clean' | |
fbfa9be9 | 1319 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
1da177e4 LT |
1320 | |
1321 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1322 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1323 | arch/*/include/generated .tmp_objdiff |
278ae604 | 1324 | MRPROPER_FILES += .config .config.old .version \ |
d5b71936 | 1325 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
fb117949 DW |
1326 | signing_key.pem signing_key.priv signing_key.x509 \ |
1327 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1328 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1329 | |
1330 | # clean - Delete most, but leave enough to build external modules | |
1331 | # | |
1332 | clean: rm-dirs := $(CLEAN_DIRS) | |
1333 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1334 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1335 | |
bd1ee804 | 1336 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1337 | $(clean-dirs): |
1338 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1339 | ||
bd1ee804 PM |
1340 | vmlinuxclean: |
1341 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1342 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1343 | |
1344 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1345 | |
1346 | # mrproper - Delete all generated files, including .config | |
1347 | # | |
1348 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1349 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1350 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1351 | |
b421b8a6 | 1352 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1353 | $(mrproper-dirs): |
1354 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1355 | ||
b421b8a6 | 1356 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1357 | $(call cmd,rmdirs) |
1358 | $(call cmd,rmfiles) | |
1359 | ||
1360 | # distclean | |
1361 | # | |
4f193362 | 1362 | PHONY += distclean |
1da177e4 LT |
1363 | |
1364 | distclean: mrproper | |
1365 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1366 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1367 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1368 | -o -name 'core' \) \ | |
1da177e4 LT |
1369 | -type f -print | xargs rm -f |
1370 | ||
1371 | ||
1372 | # Packaging of the kernel to various formats | |
1373 | # --------------------------------------------------------------------------- | |
c79624c1 | 1374 | package-dir := scripts/package |
1da177e4 | 1375 | |
bafb6747 ACM |
1376 | %src-pkg: FORCE |
1377 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1378 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1379 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1380 | |
1381 | ||
1382 | # Brief documentation of the typical targets used | |
1383 | # --------------------------------------------------------------------------- | |
1384 | ||
5dffbe81 | 1385 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1386 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1387 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1388 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1389 | |
fe69b420 | 1390 | PHONY += help |
1da177e4 LT |
1391 | help: |
1392 | @echo 'Cleaning targets:' | |
5ea084ef | 1393 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1394 | @echo ' enough build support to build external modules' |
5ea084ef | 1395 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1396 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1397 | @echo '' |
1398 | @echo 'Configuration targets:' | |
1399 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1400 | @echo '' | |
1401 | @echo 'Other generic targets:' | |
1402 | @echo ' all - Build all targets marked with [*]' | |
1403 | @echo '* vmlinux - Build the bare kernel' | |
1404 | @echo '* modules - Build all modules' | |
9cc5d74c | 1405 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1406 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1407 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1408 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1409 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1410 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1411 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1412 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1413 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1414 | @echo ' tags/TAGS - Generate tags file for editors' |
1415 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1416 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1417 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1418 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1419 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1420 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1421 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1422 | echo '' |
31b8cc80 | 1423 | @echo 'Static analysers:' |
1da177e4 LT |
1424 | @echo ' checkstack - Generate a list of stack hogs' |
1425 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1426 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1427 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1428 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1429 | @echo ' headers_check - Sanity check on exported headers' |
74425eee | 1430 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1431 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1432 | @echo '' |
31b8cc80 | 1433 | @echo 'Kernel selftest:' |
5a5da78b SK |
1434 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1435 | @echo ' Build, install, and boot kernel before' | |
1436 | @echo ' running kselftest on it' | |
dcb825a9 | 1437 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1438 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1439 | @echo ' .config.' |
5a5da78b | 1440 | @echo '' |
37c8a5fa RH |
1441 | @$(if $(dtstree), \ |
1442 | echo 'Devicetree:'; \ | |
1443 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1444 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1445 | echo '') | |
1446 | ||
31b8cc80 RD |
1447 | @echo 'Userspace tools targets:' |
1448 | @echo ' use "make tools/help"' | |
1449 | @echo ' or "cd tools; make help"' | |
1450 | @echo '' | |
1da177e4 | 1451 | @echo 'Kernel packaging:' |
6c2133e1 | 1452 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1453 | @echo '' |
1454 | @echo 'Documentation targets:' | |
cb43fb57 | 1455 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1456 | @echo '' |
01dee188 | 1457 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1458 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1459 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1460 | @echo '' |
1461 | @$(if $(boards), \ | |
1462 | $(foreach b, $(boards), \ | |
1463 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1464 | echo '') | |
5dffbe81 SB |
1465 | @$(if $(board-dirs), \ |
1466 | $(foreach b, $(board-dirs), \ | |
1467 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1468 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1469 | echo '') | |
1da177e4 LT |
1470 | |
1471 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1472 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1473 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1474 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1475 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1476 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1477 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1478 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1479 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1480 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1481 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1482 | @echo '' |
1483 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1484 | @echo 'For further info see the ./README file' | |
1485 | ||
1486 | ||
5dffbe81 SB |
1487 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1488 | ||
1489 | help-boards: $(help-board-dirs) | |
1490 | ||
fbae4d58 | 1491 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1492 | |
1493 | $(help-board-dirs): help-%: | |
1494 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1495 | @$(if $(boards-per-dir), \ | |
1496 | $(foreach b, $(boards-per-dir), \ | |
1497 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1498 | echo '') | |
1499 | ||
1500 | ||
1da177e4 LT |
1501 | # Documentation targets |
1502 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1503 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1504 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1505 | PHONY += $(DOC_TARGETS) |
1506 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1507 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1508 | |
67274c08 MY |
1509 | # Misc |
1510 | # --------------------------------------------------------------------------- | |
1511 | ||
1512 | PHONY += scripts_gdb | |
1513 | scripts_gdb: prepare | |
1e5ff84f | 1514 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1515 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1516 | |
1517 | ifdef CONFIG_GDB_SCRIPTS | |
1518 | all: scripts_gdb | |
1519 | endif | |
1520 | ||
1da177e4 LT |
1521 | else # KBUILD_EXTMOD |
1522 | ||
1523 | ### | |
1524 | # External module support. | |
1525 | # When building external modules the kernel used as basis is considered | |
1526 | # read-only, and no consistency checks are made and the make | |
1527 | # system is not used on the basis kernel. If updates are required | |
1528 | # in the basis kernel ordinary make commands (without M=...) must | |
1529 | # be used. | |
1530 | # | |
1531 | # The following are the only valid targets when building external | |
1532 | # modules. | |
1533 | # make M=dir clean Delete all automatically generated files | |
1534 | # make M=dir modules Make all modules in specified dir | |
1535 | # make M=dir Same as 'make M=dir modules' | |
1536 | # make M=dir modules_install | |
070b98bf | 1537 | # Install the modules built in the module directory |
1da177e4 LT |
1538 | # Assumes install directory is already created |
1539 | ||
1540 | # We are always building modules | |
1541 | KBUILD_MODULES := 1 | |
1da177e4 | 1542 | |
4f193362 | 1543 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1544 | $(objtree)/Module.symvers: |
1545 | @test -e $(objtree)/Module.symvers || ( \ | |
1546 | echo; \ | |
1547 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1548 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1549 | echo ) | |
1550 | ||
1551 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1552 | PHONY += $(module-dirs) modules |
e07db28e | 1553 | $(module-dirs): prepare $(objtree)/Module.symvers |
1da177e4 LT |
1554 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
1555 | ||
1556 | modules: $(module-dirs) | |
fd54f502 | 1557 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1558 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1559 | |
4f193362 | 1560 | PHONY += modules_install |
a67dc21a | 1561 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1562 | |
4f193362 PS |
1563 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1564 | PHONY += _emodinst_ | |
a67dc21a | 1565 | _emodinst_: |
a67dc21a | 1566 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1567 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1568 | |
4f193362 | 1569 | PHONY += _emodinst_post |
a67dc21a SR |
1570 | _emodinst_post: _emodinst_ |
1571 | $(call cmd,depmod) | |
1572 | ||
1da177e4 LT |
1573 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1574 | ||
4f193362 | 1575 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1576 | $(clean-dirs): |
1577 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1578 | ||
1579 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1580 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1581 | |
fe69b420 | 1582 | PHONY += help |
1da177e4 LT |
1583 | help: |
1584 | @echo ' Building external modules.' | |
1585 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1586 | @echo '' | |
1587 | @echo ' modules - default target, build the module(s)' | |
1588 | @echo ' modules_install - install the module' | |
1589 | @echo ' clean - remove generated files in module directory only' | |
1590 | @echo '' | |
06300b21 | 1591 | |
059bc9fc | 1592 | PHONY += prepare |
e07db28e MY |
1593 | prepare: |
1594 | $(cmd_crmodverdir) | |
1da177e4 LT |
1595 | endif # KBUILD_EXTMOD |
1596 | ||
88d7be03 MM |
1597 | clean: $(clean-dirs) |
1598 | $(call cmd,rmdirs) | |
1599 | $(call cmd,rmfiles) | |
43f67c98 | 1600 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1601 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1602 | -o -name '*.ko.*' \ |
1603 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1604 | -o -name '*.dwo' -o -name '*.lst' \ |
d523b255 | 1605 | -o -name '*.su' \ |
88d7be03 | 1606 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1607 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1608 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1609 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1610 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1611 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1612 | -o -name '*.ll' \ |
88d7be03 MM |
1613 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1614 | ||
1da177e4 LT |
1615 | # Generate tags for editors |
1616 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1617 | quiet_cmd_tags = GEN $@ |
1618 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1619 | |
f4ed1009 | 1620 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1621 | $(call cmd,tags) |
1622 | ||
1da177e4 LT |
1623 | # Scripts to check various things for consistency |
1624 | # --------------------------------------------------------------------------- | |
1625 | ||
279f3dd3 PF |
1626 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1627 | ||
1da177e4 | 1628 | includecheck: |
436f876c | 1629 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1630 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1631 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1632 | |
1633 | versioncheck: | |
2ee2d292 | 1634 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1635 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1636 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1637 | |
74425eee NP |
1638 | coccicheck: |
1639 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1640 | ||
1da177e4 LT |
1641 | namespacecheck: |
1642 | $(PERL) $(srctree)/scripts/namespace.pl | |
1643 | ||
295ac051 AB |
1644 | export_report: |
1645 | $(PERL) $(srctree)/scripts/export_report.pl | |
1646 | ||
c398ff00 | 1647 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1648 | |
011e3a9a JD |
1649 | # UML needs a little special treatment here. It wants to use the host |
1650 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1651 | # else wants $(ARCH), including people doing cross-builds, which means | |
1652 | # that $(SUBARCH) doesn't work here. | |
1653 | ifeq ($(ARCH), um) | |
1654 | CHECKSTACK_ARCH := $(SUBARCH) | |
1655 | else | |
1656 | CHECKSTACK_ARCH := $(ARCH) | |
1657 | endif | |
1da177e4 LT |
1658 | checkstack: |
1659 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1660 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1661 | |
7b8ea53d AW |
1662 | kernelrelease: |
1663 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1664 | |
cb58455c | 1665 | kernelversion: |
2244cbd8 | 1666 | @echo $(KERNELVERSION) |
1da177e4 | 1667 | |
c398ff00 MM |
1668 | image_name: |
1669 | @echo $(KBUILD_IMAGE) | |
1670 | ||
ea01fa9f | 1671 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1672 | |
1673 | ifeq ($(quiet),silent_) | |
1674 | tools_silent=s | |
1675 | endif | |
1676 | ||
ea01fa9f | 1677 | tools/: FORCE |
bf35182f | 1678 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1679 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1680 | |
1681 | tools/%: FORCE | |
bf35182f | 1682 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1683 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1684 | |
06300b21 SR |
1685 | # Single targets |
1686 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1687 | # Single targets are compatible with: |
e1b8513d | 1688 | # - build with mixed source and output |
bc2546a6 SR |
1689 | # - build with separate output dir 'make O=...' |
1690 | # - external modules | |
1691 | # | |
1692 | # target-dir => where to store outputfile | |
1693 | # build-dir => directory in kernel source tree to use | |
1694 | ||
6b12de69 MY |
1695 | build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ |
1696 | build-dir = $(patsubst %/,%,$(dir $(build-target))) | |
1697 | ||
1698 | %.i: prepare FORCE | |
1699 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1700 | %.ll: prepare FORCE | |
1701 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1702 | %.lst: prepare FORCE | |
1703 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1704 | %.o: prepare FORCE | |
1705 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1706 | %.s: prepare FORCE | |
1707 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1708 | %.symtypes: prepare FORCE | |
1709 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1710 | %.ko: %.o | |
1711 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
06300b21 | 1712 | |
bc2546a6 | 1713 | # Modules |
6d3c94e4 MY |
1714 | PHONY += / |
1715 | /: ./ | |
1716 | ||
8e2faea8 | 1717 | # Make sure the latest headers are built for Documentation |
ddea05fa | 1718 | Documentation/ samples/: headers_install |
059bc9fc | 1719 | %/: prepare FORCE |
648ad9b1 | 1720 | $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) |
06300b21 | 1721 | |
38385f8f | 1722 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1723 | # =========================================================================== |
1724 | ||
1725 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1726 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1727 | ||
1728 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1729 | cmd_rmfiles = rm -f $(rm-files) | |
1730 | ||