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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 | 2 | VERSION = 5 |
54ecb8f7 | 3 | PATCHLEVEL = 4 |
8248692b | 4 | SUBLEVEL = 68 |
219d5433 | 5 | EXTRAVERSION = |
d6d5df1d | 6 | NAME = Kleptomaniac Octopus |
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 | ||
221cc2d2 | 34 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
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 | ||
40 | # Avoid funny character set dependencies | |
41 | unexport LC_ALL | |
42 | LC_COLLATE=C | |
43 | LC_NUMERIC=C | |
44 | export LC_COLLATE LC_NUMERIC | |
45 | ||
46 | # Avoid interference with shell env settings | |
47 | unexport GREP_OPTIONS | |
48 | ||
066b7ed9 MM |
49 | # Beautify output |
50 | # --------------------------------------------------------------------------- | |
51 | # | |
52 | # Normally, we echo the whole command before executing it. By making | |
53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
54 | # $(quiet) to choose other forms of output instead, e.g. | |
55 | # | |
56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
58 | # | |
59 | # If $(quiet) is empty, the whole command will be printed. | |
60 | # If it is set to "quiet_", only the short version will be printed. | |
61 | # If it is set to "silent_", nothing will be printed at all, since | |
62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
63 | # | |
64 | # A simple variant is to prefix commands with $(Q) - that's useful | |
65 | # for commands that shall be hidden in non-verbose mode. | |
66 | # | |
67 | # $(Q)ln $@ :< | |
68 | # | |
69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
71 | # | |
1da177e4 LT |
72 | # To put more focus on warnings, be less verbose as default |
73 | # Use 'make V=1' to see the full commands | |
74 | ||
b8b0618c CR |
75 | ifeq ("$(origin V)", "command line") |
76 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
77 | endif |
78 | ifndef KBUILD_VERBOSE | |
79 | KBUILD_VERBOSE = 0 | |
80 | endif | |
81 | ||
066b7ed9 MM |
82 | ifeq ($(KBUILD_VERBOSE),1) |
83 | quiet = | |
84 | Q = | |
85 | else | |
86 | quiet=quiet_ | |
87 | Q = @ | |
88 | endif | |
89 | ||
90 | # If the user is running make -s (silent mode), suppress echoing of | |
91 | # commands | |
92 | ||
6f0fa58e | 93 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 MM |
94 | quiet=silent_ |
95 | endif | |
066b7ed9 MM |
96 | |
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
25b146c5 MY |
99 | # Kbuild will save output files in the current working directory. |
100 | # This does not need to match to the root of the kernel source tree. | |
101 | # | |
102 | # For example, you can do this: | |
103 | # | |
104 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
105 | # | |
106 | # If you want to save output files in a different location, there are | |
107 | # two syntaxes to specify it. | |
108 | # | |
1da177e4 LT |
109 | # 1) O= |
110 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 111 | # |
1da177e4 | 112 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
113 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
114 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
115 | # |
116 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
117 | # variable. | |
118 | ||
25b146c5 | 119 | # Do we want to change the working directory? |
b8b0618c CR |
120 | ifeq ("$(origin O)", "command line") |
121 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
122 | endif |
123 | ||
25b146c5 MY |
124 | ifneq ($(KBUILD_OUTPUT),) |
125 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
126 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
127 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
128 | $(if $(abs_objtree),, \ | |
129 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
130 | ||
131 | # $(realpath ...) resolves symlinks | |
132 | abs_objtree := $(realpath $(abs_objtree)) | |
133 | else | |
134 | abs_objtree := $(CURDIR) | |
135 | endif # ifneq ($(KBUILD_OUTPUT),) | |
136 | ||
137 | ifeq ($(abs_objtree),$(CURDIR)) | |
138 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
139 | MAKEFLAGS += --no-print-directory | |
140 | else | |
141 | need-sub-make := 1 | |
51193b76 RJ |
142 | endif |
143 | ||
25b146c5 | 144 | abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) |
1da177e4 | 145 | |
25b146c5 MY |
146 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
147 | $(error source directory cannot contain spaces or colons) | |
148 | endif | |
1da177e4 | 149 | |
25b146c5 | 150 | ifneq ($(abs_srctree),$(abs_objtree)) |
80463f1b MY |
151 | # Look for make include files relative to root of kernel src |
152 | # | |
153 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
25b146c5 MY |
154 | # once after the Makefile is read. We need to invoke sub-make. |
155 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
688931a5 | 156 | need-sub-make := 1 |
25b146c5 | 157 | endif |
3812b8c5 | 158 | |
688931a5 MY |
159 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
160 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
161 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
162 | need-sub-make := 1 | |
163 | # Cancel implicit rules for this Makefile. | |
164 | $(lastword $(MAKEFILE_LIST)): ; | |
165 | endif | |
166 | ||
25b146c5 | 167 | export abs_srctree abs_objtree |
221cc2d2 MY |
168 | export sub_make_done := 1 |
169 | ||
688931a5 MY |
170 | ifeq ($(need-sub-make),1) |
171 | ||
0b35786d MM |
172 | PHONY += $(MAKECMDGOALS) sub-make |
173 | ||
0209987f | 174 | $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 175 | @: |
0b35786d | 176 | |
c4e6fff1 | 177 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 178 | sub-make: |
25b146c5 | 179 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 180 | |
688931a5 | 181 | endif # need-sub-make |
221cc2d2 | 182 | endif # sub_make_done |
688931a5 | 183 | |
1da177e4 | 184 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 185 | ifeq ($(need-sub-make),) |
1da177e4 | 186 | |
7ff52571 MY |
187 | # Do not print "Entering directory ...", |
188 | # but we want to display it when entering to the output directory | |
189 | # so that IDEs/editors are able to understand relative filenames. | |
190 | MAKEFLAGS += --no-print-directory | |
191 | ||
aa55c8e2 MY |
192 | # Call a source code checker (by default, "sparse") as part of the |
193 | # C compilation. | |
194 | # | |
195 | # Use 'make C=1' to enable checking of only re-compiled files. | |
196 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
197 | # of whether they are re-compiled or not. | |
198 | # | |
036db11c C |
199 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
200 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
201 | |
202 | ifeq ("$(origin C)", "command line") | |
203 | KBUILD_CHECKSRC = $(C) | |
204 | endif | |
205 | ifndef KBUILD_CHECKSRC | |
206 | KBUILD_CHECKSRC = 0 | |
207 | endif | |
208 | ||
a2dc5b76 MS |
209 | # Call message checker as part of the C compilation |
210 | # | |
211 | # Use 'make D=1' to enable checking | |
212 | # Use 'make D=2' to create the message catalog | |
213 | ||
214 | ifdef D | |
215 | ifeq ("$(origin D)", "command line") | |
216 | KBUILD_KMSG_CHECK = $(D) | |
217 | endif | |
218 | endif | |
219 | ifndef KBUILD_KMSG_CHECK | |
220 | KBUILD_KMSG_CHECK = 0 | |
221 | endif | |
222 | ||
7e35b425 MY |
223 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
224 | # directory of external module to build. Setting M= takes precedence. | |
aa55c8e2 MY |
225 | ifeq ("$(origin M)", "command line") |
226 | KBUILD_EXTMOD := $(M) | |
227 | endif | |
228 | ||
051f278e MY |
229 | export KBUILD_CHECKSRC KBUILD_EXTMOD |
230 | ||
394053f4 MY |
231 | extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
232 | ||
25b146c5 | 233 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
234 | # building in the source tree |
235 | srctree := . | |
051f278e | 236 | building_out_of_srctree := |
9da0763b | 237 | else |
25b146c5 | 238 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
239 | # building in a subdirectory of the source tree |
240 | srctree := .. | |
241 | else | |
25b146c5 | 242 | srctree := $(abs_srctree) |
9da0763b | 243 | endif |
051f278e | 244 | building_out_of_srctree := 1 |
9da0763b | 245 | endif |
2c1f4f12 | 246 | |
95fd3f87 MY |
247 | ifneq ($(KBUILD_ABS_SRCTREE),) |
248 | srctree := $(abs_srctree) | |
249 | endif | |
2c1f4f12 | 250 | |
7e1c0477 | 251 | objtree := . |
6b12de69 | 252 | VPATH := $(srctree) |
1da177e4 | 253 | |
051f278e | 254 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 255 | |
2c1f4f12 MY |
256 | # To make sure we do not include .config for any of the *config targets |
257 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
258 | # It is allowed to specify more targets when calling make, including | |
259 | # mixing *config targets and build targets. | |
260 | # For example 'make oldconfig all'. | |
261 | # Detect when mixed targets is specified, and make a second invocation | |
262 | # of make so .config is not included in this case either (for *config). | |
263 | ||
264 | version_h := include/generated/uapi/linux/version.h | |
265 | old_version_h := include/linux/version.h | |
266 | ||
22340a06 MY |
267 | clean-targets := %clean mrproper cleandocs |
268 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 269 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 270 | $(version_h) headers headers_% archheaders archscripts \ |
63e31a67 | 271 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
272 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
273 | kernelrelease | |
394053f4 | 274 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
2c1f4f12 | 275 | |
2042b548 MY |
276 | config-build := |
277 | mixed-build := | |
278 | need-config := 1 | |
279 | may-sync-config := 1 | |
394053f4 | 280 | single-build := |
2c1f4f12 MY |
281 | |
282 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
283 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 284 | need-config := |
2c1f4f12 MY |
285 | endif |
286 | endif | |
287 | ||
d7942413 MY |
288 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
289 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 290 | may-sync-config := |
d7942413 MY |
291 | endif |
292 | endif | |
293 | ||
294 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 295 | may-sync-config := |
d7942413 MY |
296 | endif |
297 | ||
2c1f4f12 MY |
298 | ifeq ($(KBUILD_EXTMOD),) |
299 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
2042b548 | 300 | config-build := 1 |
2c1f4f12 | 301 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 302 | mixed-build := 1 |
2c1f4f12 MY |
303 | endif |
304 | endif | |
305 | endif | |
22340a06 | 306 | |
394053f4 MY |
307 | # We cannot build single targets and the others at the same time |
308 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
309 | single-build := 1 | |
310 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
311 | mixed-build := 1 | |
312 | endif | |
313 | endif | |
314 | ||
22340a06 MY |
315 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
316 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
317 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 318 | mixed-build := 1 |
22340a06 MY |
319 | endif |
320 | endif | |
321 | ||
2c1f4f12 MY |
322 | # install and modules_install need also be processed one by one |
323 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
324 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 325 | mixed-build := 1 |
2c1f4f12 MY |
326 | endif |
327 | endif | |
328 | ||
2042b548 | 329 | ifdef mixed-build |
2c1f4f12 MY |
330 | # =========================================================================== |
331 | # We're called with mixed targets (*config and build targets). | |
332 | # Handle them one by one. | |
333 | ||
334 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
335 | ||
336 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
337 | @: | |
338 | ||
339 | __build_one_by_one: | |
340 | $(Q)set -e; \ | |
341 | for i in $(MAKECMDGOALS); do \ | |
342 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
343 | done | |
344 | ||
2042b548 | 345 | else # !mixed-build |
2c1f4f12 | 346 | |
2c1f4f12 MY |
347 | include scripts/Kbuild.include |
348 | ||
349 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
350 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
351 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
352 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
353 | ||
b2d35fa5 | 354 | include scripts/subarch.include |
1da177e4 LT |
355 | |
356 | # Cross compiling and selecting different set of gcc/bin-utils | |
357 | # --------------------------------------------------------------------------- | |
358 | # | |
359 | # When performing cross compilation for other architectures ARCH shall be set | |
360 | # to the target architecture. (See arch/* for the possibilities). | |
361 | # ARCH can be set during invocation of make: | |
362 | # make ARCH=ia64 | |
363 | # Another way is to have ARCH set in the environment. | |
364 | # The default ARCH is the host where make is executed. | |
365 | ||
366 | # CROSS_COMPILE specify the prefix used for all executables used | |
367 | # during compilation. Only gcc and related bin-utils executables | |
368 | # are prefixed with $(CROSS_COMPILE). | |
369 | # CROSS_COMPILE can be set on the command line | |
370 | # make CROSS_COMPILE=ia64-linux- | |
371 | # Alternatively CROSS_COMPILE can be set in the environment. | |
372 | # Default value for CROSS_COMPILE is not to prefix executables | |
373 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 374 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
375 | |
376 | # Architecture as present in compile.h | |
6752ed90 TG |
377 | UTS_MACHINE := $(ARCH) |
378 | SRCARCH := $(ARCH) | |
1da177e4 | 379 | |
d746d647 SR |
380 | # Additional ARCH settings for x86 |
381 | ifeq ($(ARCH),i386) | |
382 | SRCARCH := x86 | |
383 | endif | |
384 | ifeq ($(ARCH),x86_64) | |
385 | SRCARCH := x86 | |
386 | endif | |
74b469f2 | 387 | |
5e538790 | 388 | # Additional ARCH settings for sparc |
e69f58c0 NK |
389 | ifeq ($(ARCH),sparc32) |
390 | SRCARCH := sparc | |
391 | endif | |
a439fe51 | 392 | ifeq ($(ARCH),sparc64) |
5e538790 | 393 | SRCARCH := sparc |
a439fe51 | 394 | endif |
2fb9b1bd | 395 | |
3cc000b5 PM |
396 | # Additional ARCH settings for sh |
397 | ifeq ($(ARCH),sh64) | |
398 | SRCARCH := sh | |
399 | endif | |
400 | ||
14cdd3c4 | 401 | KCONFIG_CONFIG ?= .config |
41263fc6 | 402 | export KCONFIG_CONFIG |
14cdd3c4 | 403 | |
1da177e4 | 404 | # SHELL used by kbuild |
858805b3 | 405 | CONFIG_SHELL := sh |
1da177e4 | 406 | |
6d79a7b4 MY |
407 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
408 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
409 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 410 | |
639b1baa MY |
411 | ifneq ($(LLVM),) |
412 | HOSTCC = clang | |
413 | HOSTCXX = clang++ | |
414 | else | |
415 | HOSTCC = gcc | |
416 | HOSTCXX = g++ | |
417 | endif | |
96f14fe7 | 418 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
419 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
420 | $(HOSTCFLAGS) | |
421 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
422 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
423 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 424 | |
1da177e4 | 425 | # Make variables (CC, etc...) |
1da177e4 | 426 | CPP = $(CC) -E |
639b1baa MY |
427 | ifneq ($(LLVM),) |
428 | CC = clang | |
429 | LD = ld.lld | |
430 | AR = llvm-ar | |
431 | NM = llvm-nm | |
432 | OBJCOPY = llvm-objcopy | |
433 | OBJDUMP = llvm-objdump | |
434 | READELF = llvm-readelf | |
435 | OBJSIZE = llvm-size | |
436 | STRIP = llvm-strip | |
437 | else | |
438 | CC = $(CROSS_COMPILE)gcc | |
439 | LD = $(CROSS_COMPILE)ld | |
1da177e4 LT |
440 | AR = $(CROSS_COMPILE)ar |
441 | NM = $(CROSS_COMPILE)nm | |
1da177e4 LT |
442 | OBJCOPY = $(CROSS_COMPILE)objcopy |
443 | OBJDUMP = $(CROSS_COMPILE)objdump | |
f4c1940e | 444 | READELF = $(CROSS_COMPILE)readelf |
639b1baa MY |
445 | OBJSIZE = $(CROSS_COMPILE)size |
446 | STRIP = $(CROSS_COMPILE)strip | |
447 | endif | |
e83b9f55 | 448 | PAHOLE = pahole |
73a4f6db MY |
449 | LEX = flex |
450 | YACC = bison | |
1da177e4 | 451 | AWK = awk |
caa27b66 | 452 | INSTALLKERNEL := installkernel |
1da177e4 | 453 | DEPMOD = /sbin/depmod |
1da177e4 | 454 | PERL = perl |
011bf125 | 455 | PYTHON = python |
e9781b52 | 456 | PYTHON3 = python3 |
1da177e4 | 457 | CHECK = sparse |
858805b3 | 458 | BASH = bash |
a52f41fc DE |
459 | KGZIP = gzip |
460 | KBZIP2 = bzip2 | |
461 | KLZOP = lzop | |
2f528d84 DE |
462 | LZMA = lzma |
463 | LZ4 = lz4c | |
464 | XZ = xz | |
465 | ||
80a7d1d9 | 466 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 467 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
a2dc5b76 | 468 | KMSG_CHECK = $(srctree)/scripts/kmsg-doc |
0c22be07 | 469 | NOSTDINC_FLAGS := |
6588169d SR |
470 | CFLAGS_MODULE = |
471 | AFLAGS_MODULE = | |
472 | LDFLAGS_MODULE = | |
1da177e4 LT |
473 | CFLAGS_KERNEL = |
474 | AFLAGS_KERNEL = | |
b36fad65 | 475 | LDFLAGS_vmlinux = |
1da177e4 | 476 | |
c74bfc18 LO |
477 | # Prefer linux-backports-modules |
478 | ifneq ($(KBUILD_SRC),) | |
479 | ifneq ($(shell if test -e $(KBUILD_OUTPUT)/ubuntu-build; then echo yes; fi),yes) | |
480 | UBUNTUINCLUDE := -I/usr/src/linux-headers-lbm-$(KERNELRELEASE) | |
481 | endif | |
482 | endif | |
483 | ||
abbf1590 DH |
484 | # Use USERINCLUDE when you must reference the UAPI directories only. |
485 | USERINCLUDE := \ | |
9d022c54 MY |
486 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
487 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 488 | -I$(srctree)/include/uapi \ |
3308b285 | 489 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
490 | -include $(srctree)/include/linux/kconfig.h |
491 | ||
1da177e4 LT |
492 | # Use LINUXINCLUDE when you must reference the include/ directory. |
493 | # Needed to be compatible with the O= option | |
abbf1590 | 494 | LINUXINCLUDE := \ |
c74bfc18 | 495 | $(UBUNTUINCLUDE) \ |
9d022c54 MY |
496 | -I$(srctree)/arch/$(SRCARCH)/include \ |
497 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
051f278e | 498 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
f8224f7f MY |
499 | -I$(objtree)/include \ |
500 | $(USERINCLUDE) | |
1da177e4 | 501 | |
c74bfc18 LO |
502 | # UBUNTU: Include our third party driver stuff too |
503 | LINUXINCLUDE += -Iubuntu/include $(if $(KBUILD_SRC),-I$(srctree)/ubuntu/include) | |
504 | ||
42a92bcc | 505 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 506 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 507 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 508 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 509 | -Wno-format-security \ |
433dc2eb MY |
510 | -std=gnu89 |
511 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
512 | KBUILD_AFLAGS_KERNEL := |
513 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
514 | KBUILD_AFLAGS_MODULE := -DMODULE |
515 | KBUILD_CFLAGS_MODULE := -DMODULE | |
10df0638 MY |
516 | KBUILD_LDFLAGS_MODULE := |
517 | export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds | |
d503ac53 | 518 | KBUILD_LDFLAGS := |
433dc2eb | 519 | GCC_PLUGINS_CFLAGS := |
5241ab4c | 520 | CLANG_FLAGS := |
1da177e4 | 521 | |
9e39170f | 522 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
f4c1940e | 523 | export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL |
58f8eb3c | 524 | export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
a52f41fc | 525 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ |
7bac9870 | 526 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
1da177e4 | 527 | |
d503ac53 | 528 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
529 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
530 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 531 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
a2dc5b76 | 532 | export KBUILD_KMSG_CHECK KMSG_CHECK |
6588169d | 533 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 534 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
1da177e4 | 535 | |
1da177e4 LT |
536 | # Files to ignore in find ... statements |
537 | ||
ae63b2d7 PB |
538 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
539 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
540 | -prune -o | |
450c6076 JJ |
541 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
542 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
543 | |
544 | # =========================================================================== | |
545 | # Rules shared between *config targets and build targets | |
546 | ||
312a3d09 | 547 | # Basic helpers built in scripts/basic/ |
4f193362 | 548 | PHONY += scripts_basic |
1da177e4 LT |
549 | scripts_basic: |
550 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 551 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 552 | |
4f193362 | 553 | PHONY += outputmakefile |
e8e83a23 | 554 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
555 | # outputmakefile generates a Makefile in the output directory, if using a |
556 | # separate output directory. This allows convenient use of make in the | |
557 | # output directory. | |
3a51ff34 VK |
558 | # At the same time when output Makefile generated, generate .gitignore to |
559 | # ignore whole output directory | |
1da177e4 | 560 | outputmakefile: |
051f278e | 561 | ifdef building_out_of_srctree |
e8e83a23 MY |
562 | $(Q)if [ -f $(srctree)/.config -o \ |
563 | -d $(srctree)/include/config -o \ | |
564 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
565 | echo >&2 "***"; \ | |
566 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
567 | echo >&2 "*** in $(abs_srctree)";\ | |
568 | echo >&2 "***"; \ | |
569 | false; \ | |
570 | fi | |
92979997 | 571 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 572 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
156e7cbb MY |
573 | $(Q)test -e .gitignore || \ |
574 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 575 | endif |
1da177e4 | 576 | |
99516742 | 577 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 578 | ifneq ($(CROSS_COMPILE),) |
5241ab4c | 579 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 580 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
dad5ee72 | 581 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
ef8c4ed9 | 582 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
583 | endif |
584 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 585 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 586 | endif |
eb66f824 | 587 | ifneq ($(LLVM_IAS),1) |
238bcbc4 | 588 | CLANG_FLAGS += -no-integrated-as |
876a0600 | 589 | endif |
589834b3 | 590 | CLANG_FLAGS += -Werror=unknown-warning-option |
238bcbc4 MY |
591 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
592 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 593 | export CLANG_FLAGS |
ae6b289a CF |
594 | endif |
595 | ||
315bab4e MY |
596 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
597 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
598 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
599 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
902a6898 | 600 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) |
315bab4e | 601 | |
2042b548 | 602 | ifdef config-build |
1da177e4 LT |
603 | # =========================================================================== |
604 | # *config targets only - make sure prerequisites are updated, and descend | |
605 | # in scripts/kconfig to make the *config target | |
606 | ||
607 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
608 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
609 | # used for 'make defconfig' | |
a436bb7b | 610 | include arch/$(SRCARCH)/Makefile |
315bab4e | 611 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 612 | |
36de077b | 613 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
614 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
615 | ||
36de077b | 616 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
617 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
618 | ||
2042b548 | 619 | else #!config-build |
1da177e4 LT |
620 | # =========================================================================== |
621 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
622 | # targets and others. In general all targets except *config targets. | |
623 | ||
2c1f4f12 MY |
624 | # If building an external module we do not care about the all: rule |
625 | # but instead _all depend on modules | |
626 | PHONY += all | |
627 | ifeq ($(KBUILD_EXTMOD),) | |
628 | _all: all | |
629 | else | |
630 | _all: modules | |
631 | endif | |
632 | ||
633 | # Decide whether to build built-in, modular, or both. | |
634 | # Normally, just do built-in. | |
635 | ||
636 | KBUILD_MODULES := | |
637 | KBUILD_BUILTIN := 1 | |
638 | ||
639 | # If we have only "make modules", don't compile built-in objects. | |
2c1f4f12 | 640 | ifeq ($(MAKECMDGOALS),modules) |
66834f46 | 641 | KBUILD_BUILTIN := |
2c1f4f12 MY |
642 | endif |
643 | ||
644 | # If we have "make <whatever> modules", compile modules | |
645 | # in addition to whatever we do anyway. | |
646 | # Just "make" or "make all" shall build modules as well | |
647 | ||
d85103ac | 648 | ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
649 | KBUILD_MODULES := 1 |
650 | endif | |
651 | ||
652 | ifeq ($(MAKECMDGOALS),) | |
653 | KBUILD_MODULES := 1 | |
654 | endif | |
655 | ||
656 | export KBUILD_MODULES KBUILD_BUILTIN | |
657 | ||
2042b548 | 658 | ifdef need-config |
d93a18f2 MY |
659 | include include/config/auto.conf |
660 | endif | |
661 | ||
1da177e4 | 662 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
663 | # Objects we will link into vmlinux / subdirs we need to visit |
664 | init-y := init/ | |
c74bfc18 | 665 | drivers-y := drivers/ sound/ ubuntu/ |
d93a18f2 | 666 | drivers-$(CONFIG_SAMPLES) += samples/ |
1da177e4 LT |
667 | net-y := net/ |
668 | libs-y := lib/ | |
669 | core-y := usr/ | |
37d9fe47 | 670 | virt-y := virt/ |
1da177e4 LT |
671 | endif # KBUILD_EXTMOD |
672 | ||
315bab4e MY |
673 | # The all: target is the default when no target is given on the |
674 | # command line. | |
675 | # This allow a user to issue only 'make' to build a kernel including modules | |
676 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
677 | all: vmlinux | |
678 | ||
679 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
680 | $(call cc-option,-fno-tree-loop-im) \ | |
681 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 682 | export CFLAGS_GCOV |
315bab4e | 683 | |
b1f4ff74 PZ |
684 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
685 | ifdef CONFIG_FUNCTION_TRACER | |
686 | CC_FLAGS_FTRACE := -pg | |
687 | endif | |
688 | ||
669e06b1 MY |
689 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
690 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
691 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
692 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
693 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
694 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
695 | export RETPOLINE_CFLAGS | |
696 | export RETPOLINE_VDSO_CFLAGS | |
697 | ||
315bab4e | 698 | include arch/$(SRCARCH)/Makefile |
1da177e4 | 699 | |
2042b548 MY |
700 | ifdef need-config |
701 | ifdef may-sync-config | |
315bab4e MY |
702 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
703 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
704 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 705 | include include/config/auto.conf.cmd |
1da177e4 | 706 | |
05850719 MY |
707 | $(KCONFIG_CONFIG): |
708 | @echo >&2 '***' | |
709 | @echo >&2 '*** Configuration file "$@" not found!' | |
710 | @echo >&2 '***' | |
711 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
712 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
713 | @echo >&2 '***' | |
714 | @/bin/false | |
1da177e4 | 715 | |
61277981 UM |
716 | # The actual configuration files used during the build are stored in |
717 | # include/generated/ and include/config/. Update them if .config is newer than | |
718 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
719 | # |
720 | # This exploits the 'multi-target pattern rule' trick. | |
721 | # The syncconfig should be executed only once to make all the targets. | |
722 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
911a91c3 | 723 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
2042b548 | 724 | else # !may-sync-config |
d7942413 MY |
725 | # External modules and some install targets need include/generated/autoconf.h |
726 | # and include/config/auto.conf but do not care if they are up-to-date. | |
727 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
728 | PHONY += include/config/auto.conf |
729 | ||
730 | include/config/auto.conf: | |
264a2683 | 731 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
732 | echo >&2; \ |
733 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
734 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
735 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
736 | echo >&2 ; \ | |
9ee4e336 SR |
737 | /bin/false) |
738 | ||
d7942413 | 739 | endif # may-sync-config |
2042b548 | 740 | endif # need-config |
1da177e4 | 741 | |
a1c48bb1 | 742 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 743 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
744 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
745 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 746 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 747 | |
15f5db60 MY |
748 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
749 | KBUILD_CFLAGS += -O2 | |
750 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 | |
751 | KBUILD_CFLAGS += -O3 | |
752 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
753 | KBUILD_CFLAGS += -Os | |
815eb71e | 754 | endif |
1da177e4 | 755 | |
69102311 JK |
756 | # Tell gcc to never replace conditional load with a non-conditional one |
757 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
09f7a9ca | 758 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
69102311 | 759 | |
d677a4d6 | 760 | include scripts/Makefile.kcov |
6b90bd4b ER |
761 | include scripts/Makefile.gcc-plugins |
762 | ||
1873e870 AK |
763 | ifdef CONFIG_READABLE_ASM |
764 | # Disable optimizations that make assembler listings hard to read. | |
765 | # reorder blocks reorders the control in the function | |
766 | # ipa clone creates specialized cloned functions | |
767 | # partial inlining inlines only parts of functions | |
768 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
769 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
770 | $(call cc-option,-fno-partial-inlining) | |
771 | endif | |
772 | ||
08f67461 | 773 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
774 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
775 | endif | |
776 | ||
2a61f474 | 777 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
778 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
779 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
780 | |
781 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 782 | |
076f421d | 783 | ifdef CONFIG_CC_IS_CLANG |
a1494304 MY |
784 | KBUILD_CPPFLAGS += -Qunused-arguments |
785 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
786 | KBUILD_CFLAGS += -Wno-gnu | |
cfe17c9b | 787 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
a1494304 | 788 | KBUILD_CFLAGS += -Wno-tautological-compare |
cfe17c9b MY |
789 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
790 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
791 | # See modpost pattern 2 | |
a1494304 | 792 | KBUILD_CFLAGS += -mno-global-merge |
cfe17c9b MY |
793 | else |
794 | ||
795 | # These warnings generated too much noise in a regular build. | |
796 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 797 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
e2079e93 NC |
798 | |
799 | # Warn about unmarked fall-throughs in switch statement. | |
800 | # Disabled for clang while comment to attribute conversion happens and | |
801 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. | |
802 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) | |
cfe17c9b MY |
803 | endif |
804 | ||
0a5f4176 | 805 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 806 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 807 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 808 | else |
7e9501fd RV |
809 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
810 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
811 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
812 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
813 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
814 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 815 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 816 | endif |
7e9501fd | 817 | endif |
1da177e4 | 818 | |
709a972e KC |
819 | # Initialize all stack variables with a pattern, if desired. |
820 | ifdef CONFIG_INIT_STACK_ALL | |
821 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
822 | endif | |
823 | ||
1e88e415 | 824 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 825 | |
1da177e4 | 826 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 827 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 828 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 829 | else |
1e88e415 | 830 | DEBUG_CFLAGS += -g |
866ced95 | 831 | endif |
2288328c | 832 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 833 | endif |
bfaf2dd3 | 834 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 835 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 836 | endif |
1da177e4 | 837 | |
d6f4ceb7 | 838 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 839 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 840 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
841 | endif |
842 | ||
1e88e415 MY |
843 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
844 | export DEBUG_CFLAGS | |
845 | ||
606576ce | 846 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
847 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
848 | # gcc 5 supports generating the mcount tables directly | |
849 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
850 | CC_FLAGS_FTRACE += -mrecord-mcount | |
851 | export CC_USING_RECORD_MCOUNT := 1 | |
852 | endif | |
2f4df001 VG |
853 | ifdef CONFIG_HAVE_NOP_MCOUNT |
854 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
855 | CC_FLAGS_FTRACE += -mnop-mcount | |
856 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
857 | endif | |
858 | endif | |
07d04081 | 859 | endif |
a2546fae | 860 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
861 | ifeq ($(call cc-option-yn, -mfentry),y) |
862 | CC_FLAGS_FTRACE += -mfentry | |
863 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
864 | endif | |
a2546fae | 865 | endif |
f28bc3c3 VG |
866 | export CC_FLAGS_FTRACE |
867 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
868 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 869 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 870 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
871 | BUILD_C_RECORDMCOUNT := y |
872 | export BUILD_C_RECORDMCOUNT | |
873 | endif | |
874 | endif | |
16444a8a ACM |
875 | endif |
876 | ||
91341d4b SR |
877 | # We trigger additional mismatches with less inlining |
878 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
879 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
880 | endif | |
881 | ||
90ad4052 | 882 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
883 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
884 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
885 | endif |
886 | ||
43bd3a95 MB |
887 | ifdef CONFIG_LIVEPATCH |
888 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
889 | endif | |
890 | ||
e8e69931 | 891 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 892 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 893 | |
1da177e4 | 894 | # warn about C99 declaration after statement |
a33e7ae2 | 895 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 896 | |
0bb95f80 | 897 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 898 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 899 | |
070b98bf | 900 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 901 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 902 | |
217c3e01 SR |
903 | # disable stringop warnings in gcc 8+ |
904 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
905 | ||
cb5ef857 LT |
906 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
907 | KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) | |
99c3831c | 908 | KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) |
c1c34d0b | 909 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
cb5ef857 | 910 | |
1c2abb3f LT |
911 | # Another good warning that we'll want to enable eventually |
912 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
913 | ||
205042bc LT |
914 | # Enabled with W=2, disabled by default as noisy |
915 | KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) | |
916 | ||
fe8d0a41 | 917 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 918 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 919 | |
87e0d4f0 DB |
920 | # clang sets -fmerge-all-constants by default as optimization, but this |
921 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
922 | # need to disable it here generally. | |
923 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
924 | ||
925 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
926 | # to have actual conforming behavior enabled. | |
927 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
928 | ||
3ce120b1 LT |
929 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
930 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
931 | ||
8f7f5c9f AK |
932 | # conserve stack if available |
933 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
934 | ||
fe7c36c7 JT |
935 | # Prohibit date/time macros, which would make the build non-deterministic |
936 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
937 | ||
ea8daa7b DW |
938 | # enforce correct pointer usage |
939 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
940 | ||
c834f0e8 KC |
941 | # Require designated initializers for all marked structures |
942 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
943 | ||
a73619a8 MY |
944 | # change __FILE__ to the relative path from the srctree |
945 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
946 | ||
29be86d7 SF |
947 | # ensure -fcf-protection is disabled when using retpoline as it is |
948 | # incompatible with -mindirect-branch=thunk-extern | |
949 | ifdef CONFIG_RETPOLINE | |
950 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
951 | endif | |
952 | ||
a436bb7b MY |
953 | include scripts/Makefile.kasan |
954 | include scripts/Makefile.extrawarn | |
c6d30853 | 955 | include scripts/Makefile.ubsan |
a86fe353 | 956 | |
8cc7af75 MY |
957 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
958 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
959 | KBUILD_AFLAGS += $(KAFLAGS) | |
960 | KBUILD_CFLAGS += $(KCFLAGS) | |
52bcc330 | 961 | |
89ff7131 MY |
962 | KBUILD_LDFLAGS_MODULE += --build-id |
963 | LDFLAGS_vmlinux += --build-id | |
18991197 | 964 | |
5d7d18f5 | 965 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 966 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
967 | endif |
968 | ||
5cf896fb PC |
969 | ifeq ($(CONFIG_RELR),y) |
970 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr | |
971 | endif | |
972 | ||
80591e61 LVO |
973 | # make the checker run with the right architecture |
974 | CHECKFLAGS += --arch=$(ARCH) | |
975 | ||
14516765 LVO |
976 | # insure the checker run with the right endianness |
977 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
978 | ||
1f2f01b1 LVO |
979 | # the checker needs the correct machine size |
980 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
981 | ||
1da177e4 | 982 | # Default kernel image to build when no specific target is given. |
070b98bf | 983 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
984 | # set in the environment |
985 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
986 | # this default value | |
987 | export KBUILD_IMAGE ?= vmlinux | |
988 | ||
989 | # | |
990 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
991 | # images. Default is /boot, but you can set it to other values | |
992 | export INSTALL_PATH ?= /boot | |
993 | ||
f4d4ffc0 JC |
994 | # |
995 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
996 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
997 | # an argument if needed. Otherwise it defaults to the kernel install path | |
998 | # | |
999 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1000 | ||
1da177e4 LT |
1001 | # |
1002 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1003 | # relocations required by build roots. This is not defined in the | |
070b98bf | 1004 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
1005 | # |
1006 | ||
df9df036 | 1007 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
1008 | export MODLIB |
1009 | ||
ac031f26 | 1010 | # |
3fbb43df MY |
1011 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
1012 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
1013 | # the default option --strip-debug will be used. Otherwise, | |
1014 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 1015 | |
ac031f26 TT |
1016 | ifdef INSTALL_MOD_STRIP |
1017 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 1018 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 1019 | else |
2ea03891 | 1020 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
1021 | endif # INSTALL_MOD_STRIP=1 |
1022 | else | |
2ea03891 | 1023 | mod_strip_cmd = true |
ac031f26 TT |
1024 | endif # INSTALL_MOD_STRIP |
1025 | export mod_strip_cmd | |
1026 | ||
beb50df3 BJ |
1027 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
1028 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
1029 | # or CONFIG_MODULE_COMPRESS_XZ. | |
1030 | ||
1031 | mod_compress_cmd = true | |
1032 | ifdef CONFIG_MODULE_COMPRESS | |
1033 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
a52f41fc | 1034 | mod_compress_cmd = $(KGZIP) -n -f |
beb50df3 BJ |
1035 | endif # CONFIG_MODULE_COMPRESS_GZIP |
1036 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
2f528d84 | 1037 | mod_compress_cmd = $(XZ) -f |
beb50df3 BJ |
1038 | endif # CONFIG_MODULE_COMPRESS_XZ |
1039 | endif # CONFIG_MODULE_COMPRESS | |
1040 | export mod_compress_cmd | |
1041 | ||
d9d8d7ed | 1042 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
1043 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
1044 | ||
1045 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
1046 | else |
1047 | mod_sign_cmd = true | |
1048 | endif | |
1049 | export mod_sign_cmd | |
1050 | ||
056d28d1 REB |
1051 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
1052 | ||
9f0c18ae JP |
1053 | ifdef CONFIG_STACK_VALIDATION |
1054 | has_libelf := $(call try-run,\ | |
056d28d1 | 1055 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
9f0c18ae JP |
1056 | ifeq ($(has_libelf),1) |
1057 | objtool_target := tools/objtool FORCE | |
1058 | else | |
9f0c18ae JP |
1059 | SKIP_STACK_VALIDATION := 1 |
1060 | export SKIP_STACK_VALIDATION | |
1061 | endif | |
1062 | endif | |
1063 | ||
e00d8880 | 1064 | PHONY += prepare0 |
e2a666d5 | 1065 | |
394053f4 | 1066 | export MODORDER := $(extmod-prefix)modules.order |
47801c97 | 1067 | |
1da177e4 | 1068 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 1069 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
1070 | |
1071 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
1072 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 1073 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 | 1074 | |
1eaca4b9 MY |
1075 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
1076 | $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ | |
1077 | $(drivers-) $(net-) $(libs-) $(virt-)))) | |
1da177e4 | 1078 | |
c99f3918 | 1079 | build-dirs := $(vmlinux-dirs) |
76cd306d | 1080 | clean-dirs := $(vmlinux-alldirs) |
c99f3918 | 1081 | |
f49821ee NP |
1082 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
1083 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1084 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1085 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 1086 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
1087 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
1088 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 1089 | |
1f2bfbd0 | 1090 | # Externally visible symbols (used by link-vmlinux.sh) |
d151e971 MY |
1091 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
1092 | $(drivers-y) $(net-y) $(virt-y) | |
3a166fc2 | 1093 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
95698570 | 1094 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1095 | export LDFLAGS_vmlinux |
85f0ae7e | 1096 | # used by scripts/Makefile.package |
233c741d | 1097 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
9bb48247 | 1098 | |
d151e971 | 1099 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1100 | |
3fdc7d3f MY |
1101 | # Recurse until adjust_autoksyms.sh is satisfied |
1102 | PHONY += autoksyms_recursive | |
2441e78b | 1103 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
c99f3918 | 1104 | autoksyms_recursive: descend modules.order |
ba79d401 | 1105 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1106 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1107 | endif |
23121ca2 | 1108 | |
1f50b80a MY |
1109 | # For the kernel to actually contain only the needed exported symbols, |
1110 | # we have to build modules as well to determine what those symbols are. | |
1111 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1112 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1113 | KBUILD_MODULES := 1 | |
1114 | endif | |
1115 | ||
07a422bb MY |
1116 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1117 | ||
1118 | $(autoksyms_h): | |
1119 | $(Q)mkdir -p $(dir $@) | |
1120 | $(Q)touch $@ | |
23121ca2 | 1121 | |
fbe6e37d NP |
1122 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1123 | ||
1124 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1125 | cmd_link-vmlinux = \ |
d503ac53 | 1126 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1127 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1128 | |
3fdc7d3f | 1129 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1130 | +$(call if_changed,link-vmlinux) |
741f98fe | 1131 | |
392885ee MY |
1132 | targets := vmlinux |
1133 | ||
38385f8f | 1134 | # The actual objects are generated when descending, |
1da177e4 | 1135 | # make sure no implicit rule kicks in |
c99f3918 | 1136 | $(sort $(vmlinux-deps)): descend ; |
1da177e4 | 1137 | |
ba97df45 | 1138 | filechk_kernel.release = \ |
0d0e7718 | 1139 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1140 | |
83a35e36 | 1141 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1142 | include/config/kernel.release: FORCE |
0d0e7718 | 1143 | $(call filechk,kernel.release) |
cb58455c | 1144 | |
d8821622 MY |
1145 | # Additional helpers built in scripts/ |
1146 | # Carefully list dependencies so we do not try to build scripts twice | |
1147 | # in parallel | |
1148 | PHONY += scripts | |
60df1aee | 1149 | scripts: scripts_basic scripts_dtc |
d8821622 | 1150 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1151 | |
1da177e4 | 1152 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1153 | # or the modules are listed in "prepare". |
1154 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1155 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1156 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1157 | |
a5139fb3 | 1158 | PHONY += prepare archprepare |
5bb78269 | 1159 | |
36de077b | 1160 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
30527cef | 1161 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h |
5bb78269 | 1162 | |
65bba042 | 1163 | prepare0: archprepare |
60df1aee | 1164 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1165 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1166 | |
1da177e4 | 1167 | # All the preparing.. |
b9ab5ebb JP |
1168 | prepare: prepare0 prepare-objtool |
1169 | ||
2c1f4f12 | 1170 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1171 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1172 | ||
2c1f4f12 MY |
1173 | PHONY += asm-generic uapi-asm-generic |
1174 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1175 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1176 | generic=include/asm-generic | |
2c1f4f12 | 1177 | uapi-asm-generic: |
037fc336 MY |
1178 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1179 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1180 | |
b9ab5ebb | 1181 | PHONY += prepare-objtool |
3b27a0c8 | 1182 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1183 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1184 | ifdef CONFIG_UNWINDER_ORC | |
1185 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1186 | @false | |
1187 | else | |
1188 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1189 | endif | |
1190 | endif | |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | # Generate some files |
1193 | # --------------------------------------------------------------------------- | |
1194 | ||
1195 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1196 | # needs to be updated, so this check is forced on all builds | |
1197 | ||
1198 | uts_len := 64 | |
63104eec SR |
1199 | define filechk_utsrelease.h |
1200 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1201 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1202 | exit 1; \ | |
1203 | fi; \ | |
ad774086 | 1204 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1205 | endef |
1da177e4 LT |
1206 | |
1207 | define filechk_version.h | |
ad774086 | 1208 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1209 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1210 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1211 | endef |
1212 | ||
43fee2b2 | 1213 | $(version_h): FORCE |
1da177e4 | 1214 | $(call filechk,version.h) |
223c24a7 | 1215 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1216 | |
273b281f | 1217 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1218 | $(call filechk,utsrelease.h) |
1219 | ||
179efcb4 VN |
1220 | PHONY += headerdep |
1221 | headerdep: | |
9663d989 PF |
1222 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1223 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1224 | |
8d730cfb DW |
1225 | # --------------------------------------------------------------------------- |
1226 | # Kernel headers | |
8d730cfb | 1227 | |
e6883b18 SR |
1228 | #Default location for installed headers |
1229 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1230 | |
59b2bd05 MY |
1231 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1232 | cmd_headers_install = \ | |
1233 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1234 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1235 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1236 | |
8d730cfb | 1237 | PHONY += headers_install |
59b2bd05 MY |
1238 | headers_install: headers |
1239 | $(call cmd,headers_install) | |
6520fe55 | 1240 | |
59b2bd05 | 1241 | PHONY += archheaders archscripts |
e6883b18 | 1242 | |
a5bae54c | 1243 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1244 | |
59b2bd05 MY |
1245 | PHONY += headers |
1246 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
9d022c54 | 1247 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1248 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
d5470d14 MY |
1249 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1250 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
9d931b87 | 1251 | $(Q)$(MAKE) $(hdr-inst)=ubuntu/include dst=include oldheaders= |
1f85712e | 1252 | |
3d3fd31d | 1253 | # Deprecated. It is no-op now. |
68475359 | 1254 | PHONY += headers_check |
3d3fd31d MY |
1255 | headers_check: |
1256 | @: | |
68475359 | 1257 | |
e949f4c2 | 1258 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1259 | prepare: headers |
e949f4c2 | 1260 | endif |
68475359 | 1261 | |
bdd7714b MY |
1262 | PHONY += scripts_unifdef |
1263 | scripts_unifdef: scripts_basic | |
1264 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1265 | ||
5a5da78b SK |
1266 | # --------------------------------------------------------------------------- |
1267 | # Kernel selftest | |
1268 | ||
1269 | PHONY += kselftest | |
1270 | kselftest: | |
2bc84526 | 1271 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1272 | |
17eac6c2 SK |
1273 | kselftest-%: FORCE |
1274 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
dcb825a9 | 1275 | |
3d6dee7a BJZ |
1276 | PHONY += kselftest-merge |
1277 | kselftest-merge: | |
1278 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1279 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1280 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1281 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1282 | |
37c8a5fa RH |
1283 | # --------------------------------------------------------------------------- |
1284 | # Devicetree files | |
1285 | ||
1286 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1287 | dtstree := arch/$(SRCARCH)/boot/dts | |
1288 | endif | |
1289 | ||
1290 | ifneq ($(dtstree),) | |
1291 | ||
a5139fb3 | 1292 | %.dtb: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1293 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
1294 | ||
72321cad | 1295 | PHONY += dtbs dtbs_install dtbs_check |
1fa37fb9 | 1296 | dtbs: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1297 | $(Q)$(MAKE) $(build)=$(dtstree) |
1298 | ||
1fa37fb9 MY |
1299 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
1300 | dtbs: dt_binding_check | |
1301 | endif | |
1302 | ||
4f0e3a57 | 1303 | dtbs_check: export CHECK_DTBS=1 |
1fa37fb9 | 1304 | dtbs_check: dtbs |
4f0e3a57 | 1305 | |
37c8a5fa RH |
1306 | dtbs_install: |
1307 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1308 | ||
1309 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1310 | all: dtbs | |
1311 | endif | |
1312 | ||
1313 | endif | |
1314 | ||
1315 | PHONY += scripts_dtc | |
1316 | scripts_dtc: scripts_basic | |
1317 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1318 | ||
72321cad | 1319 | PHONY += dt_binding_check |
4f0e3a57 RH |
1320 | dt_binding_check: scripts_dtc |
1321 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1322 | ||
1da177e4 LT |
1323 | # --------------------------------------------------------------------------- |
1324 | # Modules | |
1325 | ||
1326 | ifdef CONFIG_MODULES | |
1327 | ||
070b98bf | 1328 | # By default, build modules as well |
1da177e4 | 1329 | |
73d1393e | 1330 | all: modules |
1da177e4 | 1331 | |
66834f46 MY |
1332 | # When we're building modules with modversions, we need to consider |
1333 | # the built-in objects during the descend as well, in order to | |
1334 | # make sure the checksums are up to date before we record them. | |
1335 | ifdef CONFIG_MODVERSIONS | |
1336 | KBUILD_BUILTIN := 1 | |
1337 | endif | |
1338 | ||
3fbb43df | 1339 | # Build modules |
551559e1 | 1340 | # |
3fbb43df MY |
1341 | # A module can be listed more than once in obj-m resulting in |
1342 | # duplicate lines in modules.order files. Those are removed | |
1343 | # using awk while concatenating to the final file. | |
1da177e4 | 1344 | |
4f193362 | 1345 | PHONY += modules |
68980b47 | 1346 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin |
b805aa0e | 1347 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
3a48a919 | 1348 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh |
1da177e4 | 1349 | |
c99f3918 MY |
1350 | modules.order: descend |
1351 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ | |
68980b47 | 1352 | |
c99f3918 | 1353 | modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs)) |
a6c36632 | 1354 | |
50ef0cdf | 1355 | modules.builtin: $(modbuiltin-dirs) |
c99f3918 | 1356 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ |
a6c36632 | 1357 | |
50ef0cdf MY |
1358 | PHONY += $(modbuiltin-dirs) |
1359 | # tristate.conf is not included from this Makefile. Add it as a prerequisite | |
1360 | # here to make it self-healing in case somebody accidentally removes it. | |
1361 | $(modbuiltin-dirs): include/config/tristate.conf | |
1362 | $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) | |
1da177e4 LT |
1363 | |
1364 | # Target to prepare building external modules | |
4f193362 | 1365 | PHONY += modules_prepare |
059bc9fc | 1366 | modules_prepare: prepare |
1da177e4 LT |
1367 | |
1368 | # Target to install modules | |
4f193362 | 1369 | PHONY += modules_install |
1da177e4 LT |
1370 | modules_install: _modinst_ _modinst_post |
1371 | ||
4f193362 | 1372 | PHONY += _modinst_ |
2da30e70 | 1373 | _modinst_: |
1da177e4 LT |
1374 | @rm -rf $(MODLIB)/kernel |
1375 | @rm -f $(MODLIB)/source | |
1376 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1377 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1378 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1379 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1380 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1381 | fi |
1bd9a468 MY |
1382 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
1383 | @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin | |
898490c0 | 1384 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
b805aa0e | 1385 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1386 | |
50a8ec31 | 1387 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1388 | # boot a modules.dep even before / is mounted read-write. However the |
1389 | # boot script depmod is the master version. | |
4f193362 | 1390 | PHONY += _modinst_post |
6d128e1e | 1391 | _modinst_post: _modinst_ |
50a8ec31 | 1392 | $(call cmd,depmod) |
1da177e4 | 1393 | |
d890f510 JB |
1394 | ifeq ($(CONFIG_MODULE_SIG), y) |
1395 | PHONY += modules_sign | |
1396 | modules_sign: | |
1397 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1398 | endif | |
1399 | ||
1da177e4 LT |
1400 | else # CONFIG_MODULES |
1401 | ||
1402 | # Modules not configured | |
1403 | # --------------------------------------------------------------------------- | |
1404 | ||
612e47ce MY |
1405 | PHONY += modules modules_install |
1406 | modules modules_install: | |
5369f550 MM |
1407 | @echo >&2 |
1408 | @echo >&2 "The present kernel configuration has modules disabled." | |
1409 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1410 | @echo >&2 "Then build a kernel with module support enabled." | |
1411 | @echo >&2 | |
1da177e4 LT |
1412 | @exit 1 |
1413 | ||
1414 | endif # CONFIG_MODULES | |
1415 | ||
1da177e4 LT |
1416 | ### |
1417 | # Cleaning is done on three levels. | |
1418 | # make clean Delete most generated files | |
1419 | # Leave enough to build external modules | |
1420 | # make mrproper Delete the current configuration, and all generated files | |
1421 | # make distclean Remove editor backup files, patch leftover files and the like | |
1422 | ||
1423 | # Directories & files removed with 'make clean' | |
b7dca6dd | 1424 | CLEAN_DIRS += include/ksym |
898490c0 | 1425 | CLEAN_FILES += modules.builtin.modinfo |
1da177e4 LT |
1426 | |
1427 | # Directories & files removed with 'make mrproper' | |
d6fc9fcb | 1428 | MRPROPER_DIRS += include/config include/generated \ |
46a63d4b MY |
1429 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
1430 | debian/ snap/ tar-install/ | |
278ae604 | 1431 | MRPROPER_FILES += .config .config.old .version \ |
46457133 | 1432 | Module.symvers \ |
fb117949 DW |
1433 | signing_key.pem signing_key.priv signing_key.x509 \ |
1434 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
46a63d4b MY |
1435 | signing_key.x509.signer vmlinux-gdb.py \ |
1436 | *.spec | |
1da177e4 | 1437 | |
46457133 MY |
1438 | # Directories & files removed with 'make distclean' |
1439 | DISTCLEAN_DIRS += | |
1440 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS | |
1441 | ||
1da177e4 LT |
1442 | # clean - Delete most, but leave enough to build external modules |
1443 | # | |
1444 | clean: rm-dirs := $(CLEAN_DIRS) | |
1445 | clean: rm-files := $(CLEAN_FILES) | |
1da177e4 | 1446 | |
76cd306d | 1447 | PHONY += archclean vmlinuxclean |
1da177e4 | 1448 | |
bd1ee804 PM |
1449 | vmlinuxclean: |
1450 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1451 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1452 | |
1453 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1454 | |
1455 | # mrproper - Delete all generated files, including .config | |
1456 | # | |
1457 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1458 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1459 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1460 | |
b421b8a6 | 1461 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1462 | $(mrproper-dirs): |
1463 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1464 | ||
b421b8a6 | 1465 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1466 | $(call cmd,rmdirs) |
1467 | $(call cmd,rmfiles) | |
1468 | ||
1469 | # distclean | |
1470 | # | |
46457133 MY |
1471 | distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) |
1472 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) | |
1473 | ||
4f193362 | 1474 | PHONY += distclean |
1da177e4 LT |
1475 | |
1476 | distclean: mrproper | |
46457133 MY |
1477 | $(call cmd,rmdirs) |
1478 | $(call cmd,rmfiles) | |
1da177e4 | 1479 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
070b98bf | 1480 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1481 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1482 | -o -name 'core' \) \ | |
1da177e4 LT |
1483 | -type f -print | xargs rm -f |
1484 | ||
1485 | ||
1486 | # Packaging of the kernel to various formats | |
1487 | # --------------------------------------------------------------------------- | |
1da177e4 | 1488 | |
bafb6747 | 1489 | %src-pkg: FORCE |
000ec95f | 1490 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1491 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1492 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1493 | |
1494 | # Brief documentation of the typical targets used | |
1495 | # --------------------------------------------------------------------------- | |
1496 | ||
5dffbe81 | 1497 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1498 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1499 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1500 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1501 | |
fe69b420 | 1502 | PHONY += help |
1da177e4 LT |
1503 | help: |
1504 | @echo 'Cleaning targets:' | |
5ea084ef | 1505 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1506 | @echo ' enough build support to build external modules' |
5ea084ef | 1507 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1508 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1509 | @echo '' |
1510 | @echo 'Configuration targets:' | |
1511 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1512 | @echo '' | |
1513 | @echo 'Other generic targets:' | |
1514 | @echo ' all - Build all targets marked with [*]' | |
1515 | @echo '* vmlinux - Build the bare kernel' | |
1516 | @echo '* modules - Build all modules' | |
9cc5d74c | 1517 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1518 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1519 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1520 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1521 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1522 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1523 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1524 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1525 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1526 | @echo ' tags/TAGS - Generate tags file for editors' |
1527 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1528 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1529 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1530 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1531 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1532 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1533 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1534 | echo '' |
31b8cc80 | 1535 | @echo 'Static analysers:' |
1da177e4 LT |
1536 | @echo ' checkstack - Generate a list of stack hogs' |
1537 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1538 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1539 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1540 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1541 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1542 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1543 | @echo '' |
eb8305ae MM |
1544 | @echo 'Tools:' |
1545 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1546 | @echo '' | |
31b8cc80 | 1547 | @echo 'Kernel selftest:' |
5a5da78b SK |
1548 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1549 | @echo ' Build, install, and boot kernel before' | |
1550 | @echo ' running kselftest on it' | |
dcb825a9 | 1551 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1552 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1553 | @echo ' .config.' |
5a5da78b | 1554 | @echo '' |
37c8a5fa RH |
1555 | @$(if $(dtstree), \ |
1556 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1557 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1558 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1559 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1560 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1561 | echo '') |
1562 | ||
31b8cc80 RD |
1563 | @echo 'Userspace tools targets:' |
1564 | @echo ' use "make tools/help"' | |
1565 | @echo ' or "cd tools; make help"' | |
1566 | @echo '' | |
1da177e4 | 1567 | @echo 'Kernel packaging:' |
000ec95f | 1568 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1569 | @echo '' |
1570 | @echo 'Documentation targets:' | |
cb43fb57 | 1571 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1572 | @echo '' |
01dee188 | 1573 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1574 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1575 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1576 | @echo '' |
1577 | @$(if $(boards), \ | |
1578 | $(foreach b, $(boards), \ | |
1579 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1580 | echo '') | |
5dffbe81 SB |
1581 | @$(if $(board-dirs), \ |
1582 | $(foreach b, $(board-dirs), \ | |
1583 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1584 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1585 | echo '') | |
1da177e4 LT |
1586 | |
1587 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1588 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1589 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1590 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1591 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1592 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1593 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1594 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1595 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1596 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1597 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1598 | @echo '' |
1599 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1600 | @echo 'For further info see the ./README file' | |
1601 | ||
1602 | ||
5dffbe81 SB |
1603 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1604 | ||
1605 | help-boards: $(help-board-dirs) | |
1606 | ||
fbae4d58 | 1607 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1608 | |
1609 | $(help-board-dirs): help-%: | |
1610 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1611 | @$(if $(boards-per-dir), \ | |
1612 | $(foreach b, $(boards-per-dir), \ | |
1613 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1614 | echo '') | |
1615 | ||
1616 | ||
1da177e4 LT |
1617 | # Documentation targets |
1618 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1619 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1620 | linkcheckdocs dochelp refcheckdocs | |
22cba31b | 1621 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1622 | $(DOC_TARGETS): |
cb43fb57 | 1623 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1624 | |
67274c08 MY |
1625 | # Misc |
1626 | # --------------------------------------------------------------------------- | |
1627 | ||
1628 | PHONY += scripts_gdb | |
7a739ce5 | 1629 | scripts_gdb: prepare0 |
1e5ff84f | 1630 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1631 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1632 | |
1633 | ifdef CONFIG_GDB_SCRIPTS | |
1634 | all: scripts_gdb | |
1635 | endif | |
1636 | ||
1da177e4 LT |
1637 | else # KBUILD_EXTMOD |
1638 | ||
1639 | ### | |
1640 | # External module support. | |
1641 | # When building external modules the kernel used as basis is considered | |
1642 | # read-only, and no consistency checks are made and the make | |
1643 | # system is not used on the basis kernel. If updates are required | |
1644 | # in the basis kernel ordinary make commands (without M=...) must | |
1645 | # be used. | |
1646 | # | |
1647 | # The following are the only valid targets when building external | |
1648 | # modules. | |
1649 | # make M=dir clean Delete all automatically generated files | |
1650 | # make M=dir modules Make all modules in specified dir | |
1651 | # make M=dir Same as 'make M=dir modules' | |
1652 | # make M=dir modules_install | |
070b98bf | 1653 | # Install the modules built in the module directory |
1da177e4 LT |
1654 | # Assumes install directory is already created |
1655 | ||
1656 | # We are always building modules | |
1657 | KBUILD_MODULES := 1 | |
1da177e4 | 1658 | |
4f193362 | 1659 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1660 | $(objtree)/Module.symvers: |
1661 | @test -e $(objtree)/Module.symvers || ( \ | |
1662 | echo; \ | |
1663 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1664 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1665 | echo ) | |
1666 | ||
c99f3918 MY |
1667 | build-dirs := $(KBUILD_EXTMOD) |
1668 | PHONY += modules | |
1669 | modules: descend $(objtree)/Module.symvers | |
b805aa0e | 1670 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1671 | |
4f193362 | 1672 | PHONY += modules_install |
a67dc21a | 1673 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1674 | |
4f193362 PS |
1675 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1676 | PHONY += _emodinst_ | |
a67dc21a | 1677 | _emodinst_: |
a67dc21a | 1678 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1679 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1680 | |
4f193362 | 1681 | PHONY += _emodinst_post |
a67dc21a SR |
1682 | _emodinst_post: _emodinst_ |
1683 | $(call cmd,depmod) | |
1684 | ||
76cd306d | 1685 | clean-dirs := $(KBUILD_EXTMOD) |
88d7be03 | 1686 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1687 | |
d4945049 MY |
1688 | PHONY += / |
1689 | /: | |
1690 | @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' | |
1691 | ||
fe69b420 | 1692 | PHONY += help |
1da177e4 LT |
1693 | help: |
1694 | @echo ' Building external modules.' | |
1695 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1696 | @echo '' | |
1697 | @echo ' modules - default target, build the module(s)' | |
1698 | @echo ' modules_install - install the module' | |
1699 | @echo ' clean - remove generated files in module directory only' | |
1700 | @echo '' | |
06300b21 | 1701 | |
059bc9fc | 1702 | PHONY += prepare |
1da177e4 LT |
1703 | endif # KBUILD_EXTMOD |
1704 | ||
4b6eedb9 MY |
1705 | # Single targets |
1706 | # --------------------------------------------------------------------------- | |
1707 | # To build individual files in subdirectories, you can do like this: | |
1708 | # | |
1709 | # make foo/bar/baz.s | |
1710 | # | |
1711 | # The supported suffixes for single-target are listed in 'single-targets' | |
1712 | # | |
1713 | # To build only under specific subdirectories, you can do like this: | |
1714 | # | |
1715 | # make foo/bar/baz/ | |
1716 | ||
1717 | ifdef single-build | |
1718 | ||
1719 | # .ko is special because modpost is needed | |
1720 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1721 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) | |
1722 | ||
1723 | $(single-ko): single_modpost | |
1724 | @: | |
1725 | $(single-no-ko): descend | |
1726 | @: | |
1727 | ||
1728 | ifeq ($(KBUILD_EXTMOD),) | |
1729 | # For the single build of in-tree modules, use a temporary file to avoid | |
1730 | # the situation of modules_install installing an invalid modules.order. | |
1731 | MODORDER := .modules.tmp | |
1732 | endif | |
1733 | ||
1734 | PHONY += single_modpost | |
1735 | single_modpost: $(single-no-ko) | |
1736 | $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) | |
1737 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1738 | ||
1739 | KBUILD_MODULES := 1 | |
1740 | ||
1741 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) | |
1742 | ||
1743 | # trim unrelated directories | |
1744 | build-dirs := $(foreach d, $(build-dirs), \ | |
1745 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
1746 | ||
1747 | endif | |
1748 | ||
c99f3918 MY |
1749 | # Handle descending into subdirectories listed in $(build-dirs) |
1750 | # Preset locale variables to speed up the build process. Limit locale | |
1751 | # tweaks to this spot to avoid wrong language settings when running | |
1752 | # make menuconfig etc. | |
1753 | # Error messages still appears in the original language | |
1754 | PHONY += descend $(build-dirs) | |
1755 | descend: $(build-dirs) | |
1756 | $(build-dirs): prepare | |
4b6eedb9 MY |
1757 | $(Q)$(MAKE) $(build)=$@ \ |
1758 | single-build=$(if $(filter-out $@/, $(single-no-ko)),1) \ | |
1759 | need-builtin=1 need-modorder=1 | |
c99f3918 | 1760 | |
76cd306d MY |
1761 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
1762 | PHONY += $(clean-dirs) clean | |
1763 | $(clean-dirs): | |
1764 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1765 | ||
88d7be03 MM |
1766 | clean: $(clean-dirs) |
1767 | $(call cmd,rmdirs) | |
1768 | $(call cmd,rmfiles) | |
43f67c98 | 1769 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1770 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1771 | -o -name '*.ko.*' \ |
1772 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1773 | -o -name '*.dwo' -o -name '*.lst' \ |
1d082773 | 1774 | -o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \ |
88d7be03 | 1775 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1776 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1777 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1778 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1779 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1780 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1781 | -o -name '*.ll' \ |
88d7be03 MM |
1782 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1783 | ||
1da177e4 LT |
1784 | # Generate tags for editors |
1785 | # --------------------------------------------------------------------------- | |
a680eedc | 1786 | quiet_cmd_tags = GEN $@ |
858805b3 | 1787 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 1788 | |
f4ed1009 | 1789 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1790 | $(call cmd,tags) |
1791 | ||
eb8305ae MM |
1792 | # Script to generate missing namespace dependencies |
1793 | # --------------------------------------------------------------------------- | |
1794 | ||
1795 | PHONY += nsdeps | |
1796 | ||
1797 | nsdeps: modules | |
1798 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps | |
1799 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1800 | ||
1da177e4 LT |
1801 | # Scripts to check various things for consistency |
1802 | # --------------------------------------------------------------------------- | |
1803 | ||
279f3dd3 PF |
1804 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1805 | ||
1da177e4 | 1806 | includecheck: |
436f876c | 1807 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1808 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1809 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1810 | |
1811 | versioncheck: | |
2ee2d292 | 1812 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1813 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1814 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1815 | |
74425eee | 1816 | coccicheck: |
858805b3 | 1817 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 1818 | |
1da177e4 LT |
1819 | namespacecheck: |
1820 | $(PERL) $(srctree)/scripts/namespace.pl | |
1821 | ||
295ac051 AB |
1822 | export_report: |
1823 | $(PERL) $(srctree)/scripts/export_report.pl | |
1824 | ||
c398ff00 | 1825 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1826 | |
011e3a9a JD |
1827 | # UML needs a little special treatment here. It wants to use the host |
1828 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1829 | # else wants $(ARCH), including people doing cross-builds, which means | |
1830 | # that $(SUBARCH) doesn't work here. | |
1831 | ifeq ($(ARCH), um) | |
1832 | CHECKSTACK_ARCH := $(SUBARCH) | |
1833 | else | |
1834 | CHECKSTACK_ARCH := $(ARCH) | |
1835 | endif | |
1da177e4 LT |
1836 | checkstack: |
1837 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 1838 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1839 | |
7b8ea53d AW |
1840 | kernelrelease: |
1841 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1842 | |
cb58455c | 1843 | kernelversion: |
2244cbd8 | 1844 | @echo $(KERNELVERSION) |
1da177e4 | 1845 | |
c398ff00 MM |
1846 | image_name: |
1847 | @echo $(KBUILD_IMAGE) | |
1848 | ||
ea01fa9f | 1849 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1850 | |
1851 | ifeq ($(quiet),silent_) | |
1852 | tools_silent=s | |
1853 | endif | |
1854 | ||
ea01fa9f | 1855 | tools/: FORCE |
bf35182f | 1856 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1857 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
ea01fa9f BP |
1858 | |
1859 | tools/%: FORCE | |
bf35182f | 1860 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1861 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
ea01fa9f | 1862 | |
38385f8f | 1863 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1864 | # =========================================================================== |
1865 | ||
1866 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1867 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1868 | ||
1869 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1870 | cmd_rmfiles = rm -f $(rm-files) | |
1871 | ||
bc3c26fe | 1872 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1873 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1874 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1875 | $(KERNELRELEASE) |
50a8ec31 | 1876 | |
392885ee MY |
1877 | # read saved command lines for existing targets |
1878 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1879 | |
b999923c | 1880 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 1881 | |
2042b548 MY |
1882 | endif # config-targets |
1883 | endif # mixed-build | |
1884 | endif # need-sub-make | |
1da177e4 | 1885 | |
4f193362 | 1886 | PHONY += FORCE |
1da177e4 | 1887 | FORCE: |
4f193362 | 1888 | |
bd412d81 | 1889 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1890 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1891 | .PHONY: $(PHONY) |