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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 | 2 | VERSION = 5 |
b3a9e3b9 | 3 | PATCHLEVEL = 8 |
55922c9d | 4 | SUBLEVEL = 0 |
bcf87687 | 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 | ||
121c2a13 MY |
14 | $(if $(filter __%, $(MAKECMDGOALS)), \ |
15 | $(error targets prefixed with '__' are only for internal use)) | |
16 | ||
ba634ece | 17 | # That's our default target when none is given on the command line |
121c2a13 MY |
18 | PHONY := __all |
19 | __all: | |
ba634ece | 20 | |
1da177e4 LT |
21 | # We are using a recursive build, so we need to do a little thinking |
22 | # to get the ordering right. | |
23 | # | |
24 | # Most importantly: sub-Makefiles should only ever modify files in | |
25 | # their own directory. If in some directory we have a dependency on | |
26 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 27 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
28 | # turn into vmlinux), we will call a sub make in that other dir, and |
29 | # after that we are sure that everything which is in that other dir | |
30 | # is now up to date. | |
31 | # | |
32 | # The only cases where we need to modify files which have global | |
33 | # effects are thus separated out and done before the recursive | |
34 | # descending is started. They are now explicitly listed as the | |
35 | # prepare rule. | |
36 | ||
221cc2d2 | 37 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
38 | |
39 | # Do not use make's built-in rules and variables | |
40 | # (this increases performance and avoids hard-to-debug behaviour) | |
41 | MAKEFLAGS += -rR | |
42 | ||
43 | # Avoid funny character set dependencies | |
44 | unexport LC_ALL | |
45 | LC_COLLATE=C | |
46 | LC_NUMERIC=C | |
47 | export LC_COLLATE LC_NUMERIC | |
48 | ||
49 | # Avoid interference with shell env settings | |
50 | unexport GREP_OPTIONS | |
51 | ||
066b7ed9 MM |
52 | # Beautify output |
53 | # --------------------------------------------------------------------------- | |
54 | # | |
55 | # Normally, we echo the whole command before executing it. By making | |
56 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
57 | # $(quiet) to choose other forms of output instead, e.g. | |
58 | # | |
59 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
60 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
61 | # | |
62 | # If $(quiet) is empty, the whole command will be printed. | |
63 | # If it is set to "quiet_", only the short version will be printed. | |
64 | # If it is set to "silent_", nothing will be printed at all, since | |
65 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
66 | # | |
67 | # A simple variant is to prefix commands with $(Q) - that's useful | |
68 | # for commands that shall be hidden in non-verbose mode. | |
69 | # | |
70 | # $(Q)ln $@ :< | |
71 | # | |
72 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
73 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
505b12b3 | 74 | # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. |
066b7ed9 | 75 | # |
1da177e4 LT |
76 | # To put more focus on warnings, be less verbose as default |
77 | # Use 'make V=1' to see the full commands | |
78 | ||
b8b0618c CR |
79 | ifeq ("$(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 --%,$(MAKEFLAGS))),) |
066b7ed9 MM |
98 | quiet=silent_ |
99 | endif | |
066b7ed9 MM |
100 | |
101 | export quiet Q KBUILD_VERBOSE | |
102 | ||
25b146c5 MY |
103 | # Kbuild will save output files in the current working directory. |
104 | # This does not need to match to the root of the kernel source tree. | |
105 | # | |
106 | # For example, you can do this: | |
107 | # | |
108 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
109 | # | |
110 | # If you want to save output files in a different location, there are | |
111 | # two syntaxes to specify it. | |
112 | # | |
1da177e4 LT |
113 | # 1) O= |
114 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 115 | # |
1da177e4 | 116 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
117 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
118 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
119 | # |
120 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
121 | # variable. | |
122 | ||
25b146c5 | 123 | # Do we want to change the working directory? |
b8b0618c CR |
124 | ifeq ("$(origin O)", "command line") |
125 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
126 | endif |
127 | ||
25b146c5 MY |
128 | ifneq ($(KBUILD_OUTPUT),) |
129 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
130 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
131 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
132 | $(if $(abs_objtree),, \ | |
133 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
134 | ||
135 | # $(realpath ...) resolves symlinks | |
136 | abs_objtree := $(realpath $(abs_objtree)) | |
137 | else | |
138 | abs_objtree := $(CURDIR) | |
139 | endif # ifneq ($(KBUILD_OUTPUT),) | |
140 | ||
141 | ifeq ($(abs_objtree),$(CURDIR)) | |
142 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
143 | MAKEFLAGS += --no-print-directory | |
144 | else | |
145 | need-sub-make := 1 | |
51193b76 RJ |
146 | endif |
147 | ||
25b146c5 | 148 | abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) |
1da177e4 | 149 | |
25b146c5 MY |
150 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
151 | $(error source directory cannot contain spaces or colons) | |
152 | endif | |
1da177e4 | 153 | |
25b146c5 | 154 | ifneq ($(abs_srctree),$(abs_objtree)) |
80463f1b MY |
155 | # Look for make include files relative to root of kernel src |
156 | # | |
157 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
25b146c5 MY |
158 | # once after the Makefile is read. We need to invoke sub-make. |
159 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
688931a5 | 160 | need-sub-make := 1 |
25b146c5 | 161 | endif |
3812b8c5 | 162 | |
93fdddfe MY |
163 | this-makefile := $(lastword $(MAKEFILE_LIST)) |
164 | ||
688931a5 MY |
165 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
166 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
167 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
168 | need-sub-make := 1 | |
169 | # Cancel implicit rules for this Makefile. | |
93fdddfe | 170 | $(this-makefile): ; |
688931a5 MY |
171 | endif |
172 | ||
25b146c5 | 173 | export abs_srctree abs_objtree |
221cc2d2 MY |
174 | export sub_make_done := 1 |
175 | ||
688931a5 MY |
176 | ifeq ($(need-sub-make),1) |
177 | ||
121c2a13 | 178 | PHONY += $(MAKECMDGOALS) __sub-make |
0b35786d | 179 | |
121c2a13 | 180 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make |
16f89098 | 181 | @: |
0b35786d | 182 | |
c4e6fff1 | 183 | # Invoke a second make in the output directory, passing relevant variables |
121c2a13 | 184 | __sub-make: |
25b146c5 | 185 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 186 | |
688931a5 | 187 | endif # need-sub-make |
221cc2d2 | 188 | endif # sub_make_done |
688931a5 | 189 | |
1da177e4 | 190 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 191 | ifeq ($(need-sub-make),) |
1da177e4 | 192 | |
7ff52571 MY |
193 | # Do not print "Entering directory ...", |
194 | # but we want to display it when entering to the output directory | |
195 | # so that IDEs/editors are able to understand relative filenames. | |
196 | MAKEFLAGS += --no-print-directory | |
197 | ||
aa55c8e2 MY |
198 | # Call a source code checker (by default, "sparse") as part of the |
199 | # C compilation. | |
200 | # | |
201 | # Use 'make C=1' to enable checking of only re-compiled files. | |
202 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
203 | # of whether they are re-compiled or not. | |
204 | # | |
036db11c C |
205 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
206 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
207 | |
208 | ifeq ("$(origin C)", "command line") | |
209 | KBUILD_CHECKSRC = $(C) | |
210 | endif | |
211 | ifndef KBUILD_CHECKSRC | |
212 | KBUILD_CHECKSRC = 0 | |
213 | endif | |
214 | ||
7e35b425 MY |
215 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
216 | # directory of external module to build. Setting M= takes precedence. | |
aa55c8e2 MY |
217 | ifeq ("$(origin M)", "command line") |
218 | KBUILD_EXTMOD := $(M) | |
219 | endif | |
220 | ||
e9e81b63 MY |
221 | $(if $(word 2, $(KBUILD_EXTMOD)), \ |
222 | $(error building multiple external modules is not supported)) | |
223 | ||
051f278e MY |
224 | export KBUILD_CHECKSRC KBUILD_EXTMOD |
225 | ||
394053f4 MY |
226 | extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
227 | ||
25b146c5 | 228 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
229 | # building in the source tree |
230 | srctree := . | |
051f278e | 231 | building_out_of_srctree := |
9da0763b | 232 | else |
25b146c5 | 233 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
234 | # building in a subdirectory of the source tree |
235 | srctree := .. | |
236 | else | |
25b146c5 | 237 | srctree := $(abs_srctree) |
9da0763b | 238 | endif |
051f278e | 239 | building_out_of_srctree := 1 |
9da0763b | 240 | endif |
2c1f4f12 | 241 | |
95fd3f87 MY |
242 | ifneq ($(KBUILD_ABS_SRCTREE),) |
243 | srctree := $(abs_srctree) | |
244 | endif | |
2c1f4f12 | 245 | |
7e1c0477 | 246 | objtree := . |
6b12de69 | 247 | VPATH := $(srctree) |
1da177e4 | 248 | |
051f278e | 249 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 250 | |
2c1f4f12 MY |
251 | # To make sure we do not include .config for any of the *config targets |
252 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
253 | # It is allowed to specify more targets when calling make, including | |
254 | # mixing *config targets and build targets. | |
255 | # For example 'make oldconfig all'. | |
256 | # Detect when mixed targets is specified, and make a second invocation | |
257 | # of make so .config is not included in this case either (for *config). | |
258 | ||
259 | version_h := include/generated/uapi/linux/version.h | |
260 | old_version_h := include/linux/version.h | |
261 | ||
22340a06 MY |
262 | clean-targets := %clean mrproper cleandocs |
263 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 264 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 265 | $(version_h) headers headers_% archheaders archscripts \ |
4623980d DE |
266 | %asm-generic kernelversion %src-pkg dt_binding_check \ |
267 | outputmakefile | |
a29d4d8c MY |
268 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
269 | kernelrelease | |
394053f4 | 270 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
2c1f4f12 | 271 | |
2042b548 MY |
272 | config-build := |
273 | mixed-build := | |
274 | need-config := 1 | |
275 | may-sync-config := 1 | |
394053f4 | 276 | single-build := |
2c1f4f12 MY |
277 | |
278 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
279 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 280 | need-config := |
2c1f4f12 MY |
281 | endif |
282 | endif | |
283 | ||
d7942413 MY |
284 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
285 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 286 | may-sync-config := |
d7942413 MY |
287 | endif |
288 | endif | |
289 | ||
290 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 291 | may-sync-config := |
d7942413 MY |
292 | endif |
293 | ||
2c1f4f12 MY |
294 | ifeq ($(KBUILD_EXTMOD),) |
295 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
2042b548 | 296 | config-build := 1 |
2c1f4f12 | 297 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 298 | mixed-build := 1 |
2c1f4f12 MY |
299 | endif |
300 | endif | |
301 | endif | |
22340a06 | 302 | |
394053f4 MY |
303 | # We cannot build single targets and the others at the same time |
304 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
305 | single-build := 1 | |
306 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
307 | mixed-build := 1 | |
308 | endif | |
309 | endif | |
310 | ||
22340a06 MY |
311 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
312 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
313 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 314 | mixed-build := 1 |
22340a06 MY |
315 | endif |
316 | endif | |
317 | ||
2c1f4f12 MY |
318 | # install and modules_install need also be processed one by one |
319 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
320 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 321 | mixed-build := 1 |
2c1f4f12 MY |
322 | endif |
323 | endif | |
324 | ||
2042b548 | 325 | ifdef mixed-build |
2c1f4f12 MY |
326 | # =========================================================================== |
327 | # We're called with mixed targets (*config and build targets). | |
328 | # Handle them one by one. | |
329 | ||
330 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
331 | ||
121c2a13 | 332 | $(MAKECMDGOALS): __build_one_by_one |
2c1f4f12 MY |
333 | @: |
334 | ||
335 | __build_one_by_one: | |
336 | $(Q)set -e; \ | |
337 | for i in $(MAKECMDGOALS); do \ | |
338 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
339 | done | |
340 | ||
2042b548 | 341 | else # !mixed-build |
2c1f4f12 | 342 | |
2c1f4f12 MY |
343 | include scripts/Kbuild.include |
344 | ||
345 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
346 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
347 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
348 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
349 | ||
b2d35fa5 | 350 | include scripts/subarch.include |
1da177e4 LT |
351 | |
352 | # Cross compiling and selecting different set of gcc/bin-utils | |
353 | # --------------------------------------------------------------------------- | |
354 | # | |
355 | # When performing cross compilation for other architectures ARCH shall be set | |
356 | # to the target architecture. (See arch/* for the possibilities). | |
357 | # ARCH can be set during invocation of make: | |
358 | # make ARCH=ia64 | |
359 | # Another way is to have ARCH set in the environment. | |
360 | # The default ARCH is the host where make is executed. | |
361 | ||
362 | # CROSS_COMPILE specify the prefix used for all executables used | |
363 | # during compilation. Only gcc and related bin-utils executables | |
364 | # are prefixed with $(CROSS_COMPILE). | |
365 | # CROSS_COMPILE can be set on the command line | |
366 | # make CROSS_COMPILE=ia64-linux- | |
367 | # Alternatively CROSS_COMPILE can be set in the environment. | |
368 | # Default value for CROSS_COMPILE is not to prefix executables | |
369 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 370 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
371 | |
372 | # Architecture as present in compile.h | |
6752ed90 TG |
373 | UTS_MACHINE := $(ARCH) |
374 | SRCARCH := $(ARCH) | |
1da177e4 | 375 | |
d746d647 SR |
376 | # Additional ARCH settings for x86 |
377 | ifeq ($(ARCH),i386) | |
378 | SRCARCH := x86 | |
379 | endif | |
380 | ifeq ($(ARCH),x86_64) | |
381 | SRCARCH := x86 | |
382 | endif | |
74b469f2 | 383 | |
5e538790 | 384 | # Additional ARCH settings for sparc |
e69f58c0 NK |
385 | ifeq ($(ARCH),sparc32) |
386 | SRCARCH := sparc | |
387 | endif | |
a439fe51 | 388 | ifeq ($(ARCH),sparc64) |
5e538790 | 389 | SRCARCH := sparc |
a439fe51 | 390 | endif |
2fb9b1bd | 391 | |
3cc000b5 PM |
392 | # Additional ARCH settings for sh |
393 | ifeq ($(ARCH),sh64) | |
394 | SRCARCH := sh | |
395 | endif | |
396 | ||
14cdd3c4 | 397 | KCONFIG_CONFIG ?= .config |
41263fc6 | 398 | export KCONFIG_CONFIG |
14cdd3c4 | 399 | |
2a86f661 MY |
400 | # Default file for 'make defconfig'. This may be overridden by arch-Makefile. |
401 | export KBUILD_DEFCONFIG := defconfig | |
402 | ||
1da177e4 | 403 | # SHELL used by kbuild |
858805b3 | 404 | CONFIG_SHELL := sh |
1da177e4 | 405 | |
6d79a7b4 MY |
406 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
407 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
408 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 409 | |
a0d1c951 MY |
410 | ifneq ($(LLVM),) |
411 | HOSTCC = clang | |
412 | HOSTCXX = clang++ | |
413 | else | |
414 | HOSTCC = gcc | |
415 | HOSTCXX = g++ | |
416 | endif | |
7f3a59db MY |
417 | |
418 | export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ | |
419 | -O2 -fomit-frame-pointer -std=gnu89 | |
420 | export KBUILD_USERLDFLAGS := | |
421 | ||
422 | KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) | |
735aab1e | 423 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
f92d19e0 LA |
424 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
425 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 426 | |
1da177e4 | 427 | # Make variables (CC, etc...) |
1da177e4 | 428 | CPP = $(CC) -E |
a0d1c951 MY |
429 | ifneq ($(LLVM),) |
430 | CC = clang | |
431 | LD = ld.lld | |
432 | AR = llvm-ar | |
433 | NM = llvm-nm | |
434 | OBJCOPY = llvm-objcopy | |
435 | OBJDUMP = llvm-objdump | |
436 | READELF = llvm-readelf | |
437 | OBJSIZE = llvm-size | |
438 | STRIP = llvm-strip | |
439 | else | |
440 | CC = $(CROSS_COMPILE)gcc | |
441 | LD = $(CROSS_COMPILE)ld | |
1da177e4 LT |
442 | AR = $(CROSS_COMPILE)ar |
443 | NM = $(CROSS_COMPILE)nm | |
1da177e4 LT |
444 | OBJCOPY = $(CROSS_COMPILE)objcopy |
445 | OBJDUMP = $(CROSS_COMPILE)objdump | |
eefb8c12 | 446 | READELF = $(CROSS_COMPILE)readelf |
a0d1c951 MY |
447 | OBJSIZE = $(CROSS_COMPILE)size |
448 | STRIP = $(CROSS_COMPILE)strip | |
449 | endif | |
e83b9f55 | 450 | PAHOLE = pahole |
73a4f6db MY |
451 | LEX = flex |
452 | YACC = bison | |
1da177e4 | 453 | AWK = awk |
caa27b66 | 454 | INSTALLKERNEL := installkernel |
1da177e4 | 455 | DEPMOD = /sbin/depmod |
1da177e4 | 456 | PERL = perl |
011bf125 | 457 | PYTHON = python |
e9781b52 | 458 | PYTHON3 = python3 |
1da177e4 | 459 | CHECK = sparse |
858805b3 | 460 | BASH = bash |
e4a42c82 DE |
461 | KGZIP = gzip |
462 | KBZIP2 = bzip2 | |
463 | KLZOP = lzop | |
8dfb61dc DE |
464 | LZMA = lzma |
465 | LZ4 = lz4c | |
466 | XZ = xz | |
48f7ddf7 | 467 | ZSTD = zstd |
8dfb61dc | 468 | |
80a7d1d9 | 469 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 470 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
0c22be07 | 471 | NOSTDINC_FLAGS := |
6588169d SR |
472 | CFLAGS_MODULE = |
473 | AFLAGS_MODULE = | |
474 | LDFLAGS_MODULE = | |
1da177e4 LT |
475 | CFLAGS_KERNEL = |
476 | AFLAGS_KERNEL = | |
b36fad65 | 477 | LDFLAGS_vmlinux = |
1da177e4 | 478 | |
abbf1590 DH |
479 | # Use USERINCLUDE when you must reference the UAPI directories only. |
480 | USERINCLUDE := \ | |
9d022c54 MY |
481 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
482 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 483 | -I$(srctree)/include/uapi \ |
3308b285 | 484 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
485 | -include $(srctree)/include/linux/kconfig.h |
486 | ||
1da177e4 LT |
487 | # Use LINUXINCLUDE when you must reference the include/ directory. |
488 | # Needed to be compatible with the O= option | |
abbf1590 | 489 | LINUXINCLUDE := \ |
9d022c54 MY |
490 | -I$(srctree)/arch/$(SRCARCH)/include \ |
491 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
051f278e | 492 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
f8224f7f MY |
493 | -I$(objtree)/include \ |
494 | $(USERINCLUDE) | |
1da177e4 | 495 | |
42a92bcc | 496 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 497 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 498 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 499 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 500 | -Wno-format-security \ |
433dc2eb MY |
501 | -std=gnu89 |
502 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
503 | KBUILD_AFLAGS_KERNEL := |
504 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
505 | KBUILD_AFLAGS_MODULE := -DMODULE |
506 | KBUILD_CFLAGS_MODULE := -DMODULE | |
10df0638 MY |
507 | KBUILD_LDFLAGS_MODULE := |
508 | export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds | |
d503ac53 | 509 | KBUILD_LDFLAGS := |
433dc2eb | 510 | GCC_PLUGINS_CFLAGS := |
5241ab4c | 511 | CLANG_FLAGS := |
1da177e4 | 512 | |
aa824e0c | 513 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
eefb8c12 | 514 | export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL |
94f7345b | 515 | export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
48f7ddf7 | 516 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
7bac9870 | 517 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
1da177e4 | 518 | |
d503ac53 | 519 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 | 520 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
dfd402a4 | 521 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN |
222d394d | 522 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 523 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 524 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
1da177e4 | 525 | |
1da177e4 LT |
526 | # Files to ignore in find ... statements |
527 | ||
ae63b2d7 PB |
528 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
529 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
530 | -prune -o | |
450c6076 JJ |
531 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
532 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
533 | |
534 | # =========================================================================== | |
535 | # Rules shared between *config targets and build targets | |
536 | ||
312a3d09 | 537 | # Basic helpers built in scripts/basic/ |
4f193362 | 538 | PHONY += scripts_basic |
1da177e4 LT |
539 | scripts_basic: |
540 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 541 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 542 | |
4f193362 | 543 | PHONY += outputmakefile |
e8e83a23 | 544 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
545 | # outputmakefile generates a Makefile in the output directory, if using a |
546 | # separate output directory. This allows convenient use of make in the | |
547 | # output directory. | |
3a51ff34 VK |
548 | # At the same time when output Makefile generated, generate .gitignore to |
549 | # ignore whole output directory | |
1da177e4 | 550 | outputmakefile: |
051f278e | 551 | ifdef building_out_of_srctree |
e8e83a23 MY |
552 | $(Q)if [ -f $(srctree)/.config -o \ |
553 | -d $(srctree)/include/config -o \ | |
554 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
555 | echo >&2 "***"; \ | |
556 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
557 | echo >&2 "*** in $(abs_srctree)";\ | |
558 | echo >&2 "***"; \ | |
559 | false; \ | |
560 | fi | |
92979997 | 561 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 562 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
156e7cbb MY |
563 | $(Q)test -e .gitignore || \ |
564 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 565 | endif |
1da177e4 | 566 | |
99516742 | 567 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 568 | ifneq ($(CROSS_COMPILE),) |
5241ab4c | 569 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 570 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
ca9b31f6 | 571 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
ef8c4ed9 | 572 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
573 | endif |
574 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 575 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 576 | endif |
7e20e47c | 577 | ifneq ($(LLVM_IAS),1) |
238bcbc4 | 578 | CLANG_FLAGS += -no-integrated-as |
876a0600 | 579 | endif |
589834b3 | 580 | CLANG_FLAGS += -Werror=unknown-warning-option |
238bcbc4 MY |
581 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
582 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 583 | export CLANG_FLAGS |
ae6b289a CF |
584 | endif |
585 | ||
315bab4e MY |
586 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
587 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
588 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
589 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
902a6898 | 590 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) |
315bab4e | 591 | |
2042b548 | 592 | ifdef config-build |
1da177e4 LT |
593 | # =========================================================================== |
594 | # *config targets only - make sure prerequisites are updated, and descend | |
595 | # in scripts/kconfig to make the *config target | |
596 | ||
597 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
598 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
599 | # used for 'make defconfig' | |
a436bb7b | 600 | include arch/$(SRCARCH)/Makefile |
315bab4e | 601 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 602 | |
36de077b | 603 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
604 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
605 | ||
36de077b | 606 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
607 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
608 | ||
2042b548 | 609 | else #!config-build |
1da177e4 LT |
610 | # =========================================================================== |
611 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
612 | # targets and others. In general all targets except *config targets. | |
613 | ||
2c1f4f12 | 614 | # If building an external module we do not care about the all: rule |
121c2a13 | 615 | # but instead __all depend on modules |
2c1f4f12 MY |
616 | PHONY += all |
617 | ifeq ($(KBUILD_EXTMOD),) | |
121c2a13 | 618 | __all: all |
2c1f4f12 | 619 | else |
121c2a13 | 620 | __all: modules |
2c1f4f12 MY |
621 | endif |
622 | ||
623 | # Decide whether to build built-in, modular, or both. | |
624 | # Normally, just do built-in. | |
625 | ||
626 | KBUILD_MODULES := | |
627 | KBUILD_BUILTIN := 1 | |
628 | ||
629 | # If we have only "make modules", don't compile built-in objects. | |
2c1f4f12 | 630 | ifeq ($(MAKECMDGOALS),modules) |
4b50c8c4 | 631 | KBUILD_BUILTIN := |
2c1f4f12 MY |
632 | endif |
633 | ||
634 | # If we have "make <whatever> modules", compile modules | |
635 | # in addition to whatever we do anyway. | |
636 | # Just "make" or "make all" shall build modules as well | |
637 | ||
121c2a13 | 638 | ifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
639 | KBUILD_MODULES := 1 |
640 | endif | |
641 | ||
642 | ifeq ($(MAKECMDGOALS),) | |
643 | KBUILD_MODULES := 1 | |
644 | endif | |
645 | ||
646 | export KBUILD_MODULES KBUILD_BUILTIN | |
647 | ||
2042b548 | 648 | ifdef need-config |
d93a18f2 MY |
649 | include include/config/auto.conf |
650 | endif | |
651 | ||
1da177e4 | 652 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 653 | # Objects we will link into vmlinux / subdirs we need to visit |
23febe37 | 654 | core-y := init/ usr/ |
f96182e9 | 655 | drivers-y := drivers/ sound/ |
d93a18f2 | 656 | drivers-$(CONFIG_SAMPLES) += samples/ |
95fb6317 | 657 | drivers-y += net/ virt/ |
1da177e4 | 658 | libs-y := lib/ |
1da177e4 LT |
659 | endif # KBUILD_EXTMOD |
660 | ||
315bab4e MY |
661 | # The all: target is the default when no target is given on the |
662 | # command line. | |
663 | # This allow a user to issue only 'make' to build a kernel including modules | |
664 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
665 | all: vmlinux | |
666 | ||
667 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
668 | $(call cc-option,-fno-tree-loop-im) \ | |
669 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 670 | export CFLAGS_GCOV |
315bab4e | 671 | |
b1f4ff74 PZ |
672 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
673 | ifdef CONFIG_FUNCTION_TRACER | |
674 | CC_FLAGS_FTRACE := -pg | |
675 | endif | |
676 | ||
669e06b1 MY |
677 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
678 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
679 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
680 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
681 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
682 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
683 | export RETPOLINE_CFLAGS | |
684 | export RETPOLINE_VDSO_CFLAGS | |
685 | ||
315bab4e | 686 | include arch/$(SRCARCH)/Makefile |
1da177e4 | 687 | |
2042b548 MY |
688 | ifdef need-config |
689 | ifdef may-sync-config | |
315bab4e MY |
690 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
691 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
692 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 693 | include include/config/auto.conf.cmd |
1da177e4 | 694 | |
05850719 MY |
695 | $(KCONFIG_CONFIG): |
696 | @echo >&2 '***' | |
697 | @echo >&2 '*** Configuration file "$@" not found!' | |
698 | @echo >&2 '***' | |
699 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
700 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
701 | @echo >&2 '***' | |
702 | @/bin/false | |
1da177e4 | 703 | |
61277981 UM |
704 | # The actual configuration files used during the build are stored in |
705 | # include/generated/ and include/config/. Update them if .config is newer than | |
706 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
707 | # |
708 | # This exploits the 'multi-target pattern rule' trick. | |
709 | # The syncconfig should be executed only once to make all the targets. | |
f463c351 | 710 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
3044dd05 | 711 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) |
911a91c3 | 712 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
2042b548 | 713 | else # !may-sync-config |
d7942413 MY |
714 | # External modules and some install targets need include/generated/autoconf.h |
715 | # and include/config/auto.conf but do not care if they are up-to-date. | |
716 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
717 | PHONY += include/config/auto.conf |
718 | ||
719 | include/config/auto.conf: | |
264a2683 | 720 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
721 | echo >&2; \ |
722 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
723 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
724 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
725 | echo >&2 ; \ | |
9ee4e336 SR |
726 | /bin/false) |
727 | ||
d7942413 | 728 | endif # may-sync-config |
2042b548 | 729 | endif # need-config |
1da177e4 | 730 | |
a1c48bb1 | 731 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 732 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
733 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
734 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 735 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 736 | |
15f5db60 MY |
737 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
738 | KBUILD_CFLAGS += -O2 | |
739 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 | |
740 | KBUILD_CFLAGS += -O3 | |
741 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
742 | KBUILD_CFLAGS += -Os | |
815eb71e | 743 | endif |
1da177e4 | 744 | |
69102311 JK |
745 | # Tell gcc to never replace conditional load with a non-conditional one |
746 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
b1112139 | 747 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
69102311 | 748 | |
d677a4d6 | 749 | include scripts/Makefile.kcov |
6b90bd4b ER |
750 | include scripts/Makefile.gcc-plugins |
751 | ||
1873e870 AK |
752 | ifdef CONFIG_READABLE_ASM |
753 | # Disable optimizations that make assembler listings hard to read. | |
754 | # reorder blocks reorders the control in the function | |
755 | # ipa clone creates specialized cloned functions | |
756 | # partial inlining inlines only parts of functions | |
757 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
758 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
759 | $(call cc-option,-fno-partial-inlining) | |
760 | endif | |
761 | ||
08f67461 | 762 | ifneq ($(CONFIG_FRAME_WARN),0) |
a83e4ca2 | 763 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
35bb5b1e AK |
764 | endif |
765 | ||
2a61f474 | 766 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
767 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
768 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
769 | |
770 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 771 | |
076f421d | 772 | ifdef CONFIG_CC_IS_CLANG |
a1494304 MY |
773 | KBUILD_CPPFLAGS += -Qunused-arguments |
774 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
775 | KBUILD_CFLAGS += -Wno-gnu | |
cfe17c9b MY |
776 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
777 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
778 | # See modpost pattern 2 | |
a1494304 | 779 | KBUILD_CFLAGS += -mno-global-merge |
cfe17c9b MY |
780 | else |
781 | ||
782 | # These warnings generated too much noise in a regular build. | |
783 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 784 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
e2079e93 NC |
785 | |
786 | # Warn about unmarked fall-throughs in switch statement. | |
787 | # Disabled for clang while comment to attribute conversion happens and | |
788 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. | |
789 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) | |
cfe17c9b MY |
790 | endif |
791 | ||
0a5f4176 | 792 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 793 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 794 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 795 | else |
7e9501fd RV |
796 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
797 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
798 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
799 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
800 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
801 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 802 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 803 | endif |
7e9501fd | 804 | endif |
1da177e4 | 805 | |
709a972e KC |
806 | # Initialize all stack variables with a pattern, if desired. |
807 | ifdef CONFIG_INIT_STACK_ALL | |
808 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
809 | endif | |
810 | ||
1e88e415 | 811 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 812 | |
1da177e4 | 813 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 814 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 815 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 816 | else |
1e88e415 | 817 | DEBUG_CFLAGS += -g |
866ced95 | 818 | endif |
2288328c | 819 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 820 | endif |
bfaf2dd3 | 821 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 822 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 823 | endif |
1da177e4 | 824 | |
d6f4ceb7 | 825 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 826 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 827 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
828 | endif |
829 | ||
10e68b02 ND |
830 | ifdef CONFIG_DEBUG_INFO_COMPRESSED |
831 | DEBUG_CFLAGS += -gz=zlib | |
7b169944 | 832 | KBUILD_AFLAGS += -gz=zlib |
10e68b02 ND |
833 | KBUILD_LDFLAGS += --compress-debug-sections=zlib |
834 | endif | |
835 | ||
1e88e415 MY |
836 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
837 | export DEBUG_CFLAGS | |
838 | ||
606576ce | 839 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
840 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
841 | # gcc 5 supports generating the mcount tables directly | |
842 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
843 | CC_FLAGS_FTRACE += -mrecord-mcount | |
844 | export CC_USING_RECORD_MCOUNT := 1 | |
845 | endif | |
2f4df001 VG |
846 | ifdef CONFIG_HAVE_NOP_MCOUNT |
847 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
848 | CC_FLAGS_FTRACE += -mnop-mcount | |
849 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
850 | endif | |
851 | endif | |
07d04081 | 852 | endif |
a2546fae | 853 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
854 | ifeq ($(call cc-option-yn, -mfentry),y) |
855 | CC_FLAGS_FTRACE += -mfentry | |
856 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
857 | endif | |
a2546fae | 858 | endif |
f28bc3c3 VG |
859 | export CC_FLAGS_FTRACE |
860 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
861 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 862 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 863 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
864 | BUILD_C_RECORDMCOUNT := y |
865 | export BUILD_C_RECORDMCOUNT | |
866 | endif | |
867 | endif | |
16444a8a ACM |
868 | endif |
869 | ||
91341d4b SR |
870 | # We trigger additional mismatches with less inlining |
871 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
872 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
873 | endif | |
874 | ||
90ad4052 | 875 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
876 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
877 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
878 | endif |
879 | ||
43bd3a95 MB |
880 | ifdef CONFIG_LIVEPATCH |
881 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
882 | endif | |
883 | ||
d08b9f0c ST |
884 | ifdef CONFIG_SHADOW_CALL_STACK |
885 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack | |
886 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
887 | export CC_FLAGS_SCS | |
888 | endif | |
889 | ||
e8e69931 | 890 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 891 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 892 | |
1da177e4 | 893 | # warn about C99 declaration after statement |
a33e7ae2 | 894 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 895 | |
0bb95f80 | 896 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 897 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 898 | |
070b98bf | 899 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 900 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 901 | |
217c3e01 SR |
902 | # disable stringop warnings in gcc 8+ |
903 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
904 | ||
5c45de21 LT |
905 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
906 | KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) | |
44720996 | 907 | KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) |
5a76021c | 908 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
5c45de21 | 909 | |
adc71920 LT |
910 | # Another good warning that we'll want to enable eventually |
911 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
912 | ||
78a5255f LT |
913 | # Enabled with W=2, disabled by default as noisy |
914 | KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) | |
915 | ||
fe8d0a41 | 916 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 917 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 918 | |
87e0d4f0 DB |
919 | # clang sets -fmerge-all-constants by default as optimization, but this |
920 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
921 | # need to disable it here generally. | |
922 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
923 | ||
924 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
925 | # to have actual conforming behavior enabled. | |
926 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
927 | ||
3ce120b1 LT |
928 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
929 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
930 | ||
8f7f5c9f AK |
931 | # conserve stack if available |
932 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
933 | ||
fe7c36c7 JT |
934 | # Prohibit date/time macros, which would make the build non-deterministic |
935 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
936 | ||
ea8daa7b DW |
937 | # enforce correct pointer usage |
938 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
939 | ||
c834f0e8 KC |
940 | # Require designated initializers for all marked structures |
941 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
942 | ||
a73619a8 MY |
943 | # change __FILE__ to the relative path from the srctree |
944 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
945 | ||
29be86d7 SF |
946 | # ensure -fcf-protection is disabled when using retpoline as it is |
947 | # incompatible with -mindirect-branch=thunk-extern | |
948 | ifdef CONFIG_RETPOLINE | |
949 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
950 | endif | |
951 | ||
a436bb7b MY |
952 | include scripts/Makefile.kasan |
953 | include scripts/Makefile.extrawarn | |
c6d30853 | 954 | include scripts/Makefile.ubsan |
dfd402a4 | 955 | include scripts/Makefile.kcsan |
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 | ||
7f3a59db | 973 | # Align the bit size of userspace programs with the kernel |
7f58b487 MY |
974 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
975 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
7f3a59db | 976 | |
80591e61 LVO |
977 | # make the checker run with the right architecture |
978 | CHECKFLAGS += --arch=$(ARCH) | |
979 | ||
14516765 LVO |
980 | # insure the checker run with the right endianness |
981 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
982 | ||
1f2f01b1 LVO |
983 | # the checker needs the correct machine size |
984 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
985 | ||
1da177e4 | 986 | # Default kernel image to build when no specific target is given. |
070b98bf | 987 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
988 | # set in the environment |
989 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
990 | # this default value | |
991 | export KBUILD_IMAGE ?= vmlinux | |
992 | ||
993 | # | |
994 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
995 | # images. Default is /boot, but you can set it to other values | |
996 | export INSTALL_PATH ?= /boot | |
997 | ||
f4d4ffc0 JC |
998 | # |
999 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1000 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1001 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1002 | # | |
1003 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1004 | ||
1da177e4 LT |
1005 | # |
1006 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1007 | # relocations required by build roots. This is not defined in the | |
070b98bf | 1008 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
1009 | # |
1010 | ||
df9df036 | 1011 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
1012 | export MODLIB |
1013 | ||
ac031f26 | 1014 | # |
3fbb43df MY |
1015 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
1016 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
1017 | # the default option --strip-debug will be used. Otherwise, | |
1018 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 1019 | |
ac031f26 TT |
1020 | ifdef INSTALL_MOD_STRIP |
1021 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 1022 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 1023 | else |
2ea03891 | 1024 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
1025 | endif # INSTALL_MOD_STRIP=1 |
1026 | else | |
2ea03891 | 1027 | mod_strip_cmd = true |
ac031f26 TT |
1028 | endif # INSTALL_MOD_STRIP |
1029 | export mod_strip_cmd | |
1030 | ||
beb50df3 BJ |
1031 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
1032 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
1033 | # or CONFIG_MODULE_COMPRESS_XZ. | |
1034 | ||
1035 | mod_compress_cmd = true | |
1036 | ifdef CONFIG_MODULE_COMPRESS | |
1037 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
e4a42c82 | 1038 | mod_compress_cmd = $(KGZIP) -n -f |
beb50df3 BJ |
1039 | endif # CONFIG_MODULE_COMPRESS_GZIP |
1040 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
8dfb61dc | 1041 | mod_compress_cmd = $(XZ) -f |
beb50df3 BJ |
1042 | endif # CONFIG_MODULE_COMPRESS_XZ |
1043 | endif # CONFIG_MODULE_COMPRESS | |
1044 | export mod_compress_cmd | |
1045 | ||
d9d8d7ed | 1046 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
1047 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
1048 | ||
1049 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
1050 | else |
1051 | mod_sign_cmd = true | |
1052 | endif | |
1053 | export mod_sign_cmd | |
1054 | ||
056d28d1 REB |
1055 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
1056 | ||
9f0c18ae JP |
1057 | ifdef CONFIG_STACK_VALIDATION |
1058 | has_libelf := $(call try-run,\ | |
056d28d1 | 1059 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
9f0c18ae JP |
1060 | ifeq ($(has_libelf),1) |
1061 | objtool_target := tools/objtool FORCE | |
1062 | else | |
9f0c18ae JP |
1063 | SKIP_STACK_VALIDATION := 1 |
1064 | export SKIP_STACK_VALIDATION | |
1065 | endif | |
1066 | endif | |
1067 | ||
e00d8880 | 1068 | PHONY += prepare0 |
e2a666d5 | 1069 | |
394053f4 | 1070 | export MODORDER := $(extmod-prefix)modules.order |
bc35d4bd | 1071 | export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps |
47801c97 | 1072 | |
1da177e4 | 1073 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 1074 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 | 1075 | |
23febe37 | 1076 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ |
1da177e4 | 1077 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
95fb6317 | 1078 | $(libs-y) $(libs-m))) |
1da177e4 | 1079 | |
1eaca4b9 | 1080 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
23febe37 | 1081 | $(patsubst %/,%,$(filter %/, $(core-) \ |
95fb6317 | 1082 | $(drivers-) $(libs-)))) |
1da177e4 | 1083 | |
b2c88554 MY |
1084 | subdir-modorder := $(addsuffix modules.order,$(filter %/, \ |
1085 | $(core-y) $(core-m) $(libs-y) $(libs-m) \ | |
1086 | $(drivers-y) $(drivers-m))) | |
1da177e4 | 1087 | |
c99f3918 | 1088 | build-dirs := $(vmlinux-dirs) |
76cd306d | 1089 | clean-dirs := $(vmlinux-alldirs) |
c99f3918 | 1090 | |
f0d50ca0 MY |
1091 | # Externally visible symbols (used by link-vmlinux.sh) |
1092 | KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) | |
1093 | KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) | |
7273ad2b | 1094 | ifdef CONFIG_MODULES |
f0d50ca0 MY |
1095 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
1096 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
7273ad2b | 1097 | else |
f0d50ca0 | 1098 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
7273ad2b | 1099 | endif |
f0d50ca0 | 1100 | KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) |
1da177e4 | 1101 | |
f0d50ca0 | 1102 | export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS |
95698570 | 1103 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1104 | export LDFLAGS_vmlinux |
85f0ae7e | 1105 | # used by scripts/Makefile.package |
233c741d | 1106 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
9bb48247 | 1107 | |
d151e971 | 1108 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1109 | |
3fdc7d3f MY |
1110 | # Recurse until adjust_autoksyms.sh is satisfied |
1111 | PHONY += autoksyms_recursive | |
2441e78b | 1112 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
1f50b80a MY |
1113 | # For the kernel to actually contain only the needed exported symbols, |
1114 | # we have to build modules as well to determine what those symbols are. | |
1115 | # (this can be evaluated only once include/config/auto.conf has been included) | |
fb2d99be MY |
1116 | KBUILD_MODULES := 1 |
1117 | ||
1118 | autoksyms_recursive: descend modules.order | |
1119 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1120 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1f50b80a MY |
1121 | endif |
1122 | ||
07a422bb MY |
1123 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1124 | ||
88694cff QP |
1125 | quiet_cmd_autoksyms_h = GEN $@ |
1126 | cmd_autoksyms_h = mkdir -p $(dir $@); \ | |
1127 | $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ | |
1128 | ||
07a422bb | 1129 | $(autoksyms_h): |
88694cff | 1130 | $(call cmd,autoksyms_h) |
23121ca2 | 1131 | |
fbe6e37d NP |
1132 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1133 | ||
1134 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1135 | cmd_link-vmlinux = \ |
d503ac53 | 1136 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1137 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1138 | |
3fdc7d3f | 1139 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1140 | +$(call if_changed,link-vmlinux) |
741f98fe | 1141 | |
392885ee MY |
1142 | targets := vmlinux |
1143 | ||
38385f8f | 1144 | # The actual objects are generated when descending, |
1da177e4 | 1145 | # make sure no implicit rule kicks in |
b2c88554 | 1146 | $(sort $(vmlinux-deps) $(subdir-modorder)): descend ; |
1da177e4 | 1147 | |
ba97df45 | 1148 | filechk_kernel.release = \ |
0d0e7718 | 1149 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1150 | |
83a35e36 | 1151 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1152 | include/config/kernel.release: FORCE |
0d0e7718 | 1153 | $(call filechk,kernel.release) |
cb58455c | 1154 | |
d8821622 MY |
1155 | # Additional helpers built in scripts/ |
1156 | # Carefully list dependencies so we do not try to build scripts twice | |
1157 | # in parallel | |
1158 | PHONY += scripts | |
60df1aee | 1159 | scripts: scripts_basic scripts_dtc |
d8821622 | 1160 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1161 | |
1da177e4 | 1162 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1163 | # or the modules are listed in "prepare". |
1164 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1165 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1166 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1167 | |
a5139fb3 | 1168 | PHONY += prepare archprepare |
5bb78269 | 1169 | |
36de077b | 1170 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
3044dd05 MY |
1171 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
1172 | include/generated/autoconf.h | |
5bb78269 | 1173 | |
65bba042 | 1174 | prepare0: archprepare |
60df1aee | 1175 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1176 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1177 | |
1da177e4 | 1178 | # All the preparing.. |
b9ab5ebb JP |
1179 | prepare: prepare0 prepare-objtool |
1180 | ||
2c1f4f12 | 1181 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1182 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1183 | ||
2c1f4f12 MY |
1184 | PHONY += asm-generic uapi-asm-generic |
1185 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1186 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1187 | generic=include/asm-generic | |
2c1f4f12 | 1188 | uapi-asm-generic: |
037fc336 MY |
1189 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1190 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1191 | |
b9ab5ebb | 1192 | PHONY += prepare-objtool |
3b27a0c8 | 1193 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1194 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1195 | ifdef CONFIG_UNWINDER_ORC | |
1196 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1197 | @false | |
1198 | else | |
1199 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1200 | endif | |
1201 | endif | |
1da177e4 | 1202 | |
1da177e4 LT |
1203 | # Generate some files |
1204 | # --------------------------------------------------------------------------- | |
1205 | ||
1206 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1207 | # needs to be updated, so this check is forced on all builds | |
1208 | ||
1209 | uts_len := 64 | |
63104eec SR |
1210 | define filechk_utsrelease.h |
1211 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1212 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1213 | exit 1; \ | |
1214 | fi; \ | |
ad774086 | 1215 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1216 | endef |
1da177e4 LT |
1217 | |
1218 | define filechk_version.h | |
ad774086 | 1219 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1220 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1221 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1222 | endef |
1223 | ||
43fee2b2 | 1224 | $(version_h): FORCE |
1da177e4 | 1225 | $(call filechk,version.h) |
223c24a7 | 1226 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1227 | |
273b281f | 1228 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1229 | $(call filechk,utsrelease.h) |
1230 | ||
179efcb4 VN |
1231 | PHONY += headerdep |
1232 | headerdep: | |
9663d989 PF |
1233 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1234 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1235 | |
8d730cfb DW |
1236 | # --------------------------------------------------------------------------- |
1237 | # Kernel headers | |
8d730cfb | 1238 | |
e6883b18 SR |
1239 | #Default location for installed headers |
1240 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1241 | |
59b2bd05 MY |
1242 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1243 | cmd_headers_install = \ | |
1244 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1245 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1246 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1247 | |
8d730cfb | 1248 | PHONY += headers_install |
59b2bd05 MY |
1249 | headers_install: headers |
1250 | $(call cmd,headers_install) | |
6520fe55 | 1251 | |
59b2bd05 | 1252 | PHONY += archheaders archscripts |
e6883b18 | 1253 | |
a5bae54c | 1254 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1255 | |
59b2bd05 MY |
1256 | PHONY += headers |
1257 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
9d022c54 | 1258 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1259 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
d5470d14 MY |
1260 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1261 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1262 | |
7ecaf069 | 1263 | # Deprecated. It is no-op now. |
68475359 | 1264 | PHONY += headers_check |
7ecaf069 MY |
1265 | headers_check: |
1266 | @: | |
68475359 | 1267 | |
e949f4c2 | 1268 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1269 | prepare: headers |
e949f4c2 | 1270 | endif |
68475359 | 1271 | |
bdd7714b MY |
1272 | PHONY += scripts_unifdef |
1273 | scripts_unifdef: scripts_basic | |
1274 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1275 | ||
5a5da78b SK |
1276 | # --------------------------------------------------------------------------- |
1277 | # Kernel selftest | |
1278 | ||
1279 | PHONY += kselftest | |
1280 | kselftest: | |
2bc84526 | 1281 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1282 | |
17eac6c2 SK |
1283 | kselftest-%: FORCE |
1284 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
dcb825a9 | 1285 | |
3d6dee7a BJZ |
1286 | PHONY += kselftest-merge |
1287 | kselftest-merge: | |
1288 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1289 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1290 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1291 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1292 | |
37c8a5fa RH |
1293 | # --------------------------------------------------------------------------- |
1294 | # Devicetree files | |
1295 | ||
1296 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1297 | dtstree := arch/$(SRCARCH)/boot/dts | |
1298 | endif | |
1299 | ||
1300 | ifneq ($(dtstree),) | |
1301 | ||
a5139fb3 | 1302 | %.dtb: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1303 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
1304 | ||
c473a8d0 | 1305 | PHONY += dtbs dtbs_install dtbs_check |
b5154bf6 | 1306 | dtbs: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1307 | $(Q)$(MAKE) $(build)=$(dtstree) |
1308 | ||
b5154bf6 | 1309 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
e10c4321 | 1310 | export CHECK_DTBS=y |
b5154bf6 MY |
1311 | dtbs: dt_binding_check |
1312 | endif | |
1313 | ||
b5154bf6 | 1314 | dtbs_check: dtbs |
4f0e3a57 | 1315 | |
37c8a5fa | 1316 | dtbs_install: |
2431f22a | 1317 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
37c8a5fa RH |
1318 | |
1319 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1320 | all: dtbs | |
1321 | endif | |
1322 | ||
1323 | endif | |
1324 | ||
1325 | PHONY += scripts_dtc | |
1326 | scripts_dtc: scripts_basic | |
1327 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1328 | ||
e10c4321 MY |
1329 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
1330 | export CHECK_DT_BINDING=y | |
1331 | endif | |
1332 | ||
c473a8d0 | 1333 | PHONY += dt_binding_check |
4f0e3a57 RH |
1334 | dt_binding_check: scripts_dtc |
1335 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1336 | ||
1da177e4 LT |
1337 | # --------------------------------------------------------------------------- |
1338 | # Modules | |
1339 | ||
1340 | ifdef CONFIG_MODULES | |
1341 | ||
070b98bf | 1342 | # By default, build modules as well |
1da177e4 | 1343 | |
73d1393e | 1344 | all: modules |
1da177e4 | 1345 | |
4b50c8c4 MY |
1346 | # When we're building modules with modversions, we need to consider |
1347 | # the built-in objects during the descend as well, in order to | |
1348 | # make sure the checksums are up to date before we record them. | |
1349 | ifdef CONFIG_MODVERSIONS | |
1350 | KBUILD_BUILTIN := 1 | |
1351 | endif | |
1352 | ||
3fbb43df | 1353 | # Build modules |
551559e1 | 1354 | # |
3fbb43df MY |
1355 | # A module can be listed more than once in obj-m resulting in |
1356 | # duplicate lines in modules.order files. Those are removed | |
1357 | # using awk while concatenating to the final file. | |
1da177e4 | 1358 | |
4f193362 | 1359 | PHONY += modules |
8451791d | 1360 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check |
b805aa0e | 1361 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1362 | |
8451791d MY |
1363 | PHONY += modules_check |
1364 | modules_check: modules.order | |
1365 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1da177e4 | 1366 | |
b2c88554 MY |
1367 | cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ |
1368 | ||
1369 | modules.order: $(subdir-modorder) FORCE | |
1370 | $(call if_changed,modules_order) | |
1371 | ||
1372 | targets += modules.order | |
68980b47 | 1373 | |
1da177e4 | 1374 | # Target to prepare building external modules |
4f193362 | 1375 | PHONY += modules_prepare |
059bc9fc | 1376 | modules_prepare: prepare |
1da177e4 LT |
1377 | |
1378 | # Target to install modules | |
4f193362 | 1379 | PHONY += modules_install |
1da177e4 LT |
1380 | modules_install: _modinst_ _modinst_post |
1381 | ||
4f193362 | 1382 | PHONY += _modinst_ |
2c6d9636 | 1383 | _modinst_: |
1da177e4 LT |
1384 | @rm -rf $(MODLIB)/kernel |
1385 | @rm -f $(MODLIB)/source | |
1386 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1387 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1388 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1389 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1390 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1391 | fi |
1bd9a468 | 1392 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
2c6d9636 MY |
1393 | @cp -f modules.builtin $(MODLIB)/ |
1394 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
b805aa0e | 1395 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1396 | |
50a8ec31 | 1397 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1398 | # boot a modules.dep even before / is mounted read-write. However the |
1399 | # boot script depmod is the master version. | |
4f193362 | 1400 | PHONY += _modinst_post |
6d128e1e | 1401 | _modinst_post: _modinst_ |
50a8ec31 | 1402 | $(call cmd,depmod) |
1da177e4 | 1403 | |
d890f510 JB |
1404 | ifeq ($(CONFIG_MODULE_SIG), y) |
1405 | PHONY += modules_sign | |
1406 | modules_sign: | |
1407 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1408 | endif | |
1409 | ||
1da177e4 LT |
1410 | else # CONFIG_MODULES |
1411 | ||
1412 | # Modules not configured | |
1413 | # --------------------------------------------------------------------------- | |
1414 | ||
612e47ce MY |
1415 | PHONY += modules modules_install |
1416 | modules modules_install: | |
5369f550 MM |
1417 | @echo >&2 |
1418 | @echo >&2 "The present kernel configuration has modules disabled." | |
1419 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1420 | @echo >&2 "Then build a kernel with module support enabled." | |
1421 | @echo >&2 | |
1da177e4 LT |
1422 | @exit 1 |
1423 | ||
1424 | endif # CONFIG_MODULES | |
1425 | ||
1da177e4 LT |
1426 | ### |
1427 | # Cleaning is done on three levels. | |
1428 | # make clean Delete most generated files | |
1429 | # Leave enough to build external modules | |
1430 | # make mrproper Delete the current configuration, and all generated files | |
1431 | # make distclean Remove editor backup files, patch leftover files and the like | |
1432 | ||
1433 | # Directories & files removed with 'make clean' | |
269a535c | 1434 | CLEAN_FILES += include/ksym vmlinux.symvers \ |
0663c68c | 1435 | modules.builtin modules.builtin.modinfo modules.nsdeps |
1da177e4 LT |
1436 | |
1437 | # Directories & files removed with 'make mrproper' | |
0663c68c | 1438 | MRPROPER_FILES += include/config include/generated \ |
46a63d4b | 1439 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
0663c68c MY |
1440 | debian snap tar-install \ |
1441 | .config .config.old .version \ | |
46457133 | 1442 | Module.symvers \ |
fb117949 DW |
1443 | signing_key.pem signing_key.priv signing_key.x509 \ |
1444 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
46a63d4b MY |
1445 | signing_key.x509.signer vmlinux-gdb.py \ |
1446 | *.spec | |
1da177e4 | 1447 | |
46457133 | 1448 | # Directories & files removed with 'make distclean' |
46457133 MY |
1449 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS |
1450 | ||
1da177e4 LT |
1451 | # clean - Delete most, but leave enough to build external modules |
1452 | # | |
1da177e4 | 1453 | clean: rm-files := $(CLEAN_FILES) |
1da177e4 | 1454 | |
76cd306d | 1455 | PHONY += archclean vmlinuxclean |
1da177e4 | 1456 | |
bd1ee804 PM |
1457 | vmlinuxclean: |
1458 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1459 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1460 | |
1461 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1462 | |
1463 | # mrproper - Delete all generated files, including .config | |
1464 | # | |
1da177e4 | 1465 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
cb43fb57 | 1466 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1467 | |
b421b8a6 | 1468 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1469 | $(mrproper-dirs): |
1470 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1471 | ||
b421b8a6 | 1472 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1473 | $(call cmd,rmfiles) |
1474 | ||
1475 | # distclean | |
1476 | # | |
46457133 MY |
1477 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) |
1478 | ||
4f193362 | 1479 | PHONY += distclean |
1da177e4 LT |
1480 | |
1481 | distclean: mrproper | |
46457133 | 1482 | $(call cmd,rmfiles) |
1da177e4 | 1483 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
070b98bf | 1484 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1485 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1486 | -o -name 'core' \) \ | |
1da177e4 LT |
1487 | -type f -print | xargs rm -f |
1488 | ||
1489 | ||
1490 | # Packaging of the kernel to various formats | |
1491 | # --------------------------------------------------------------------------- | |
1da177e4 | 1492 | |
bafb6747 | 1493 | %src-pkg: FORCE |
000ec95f | 1494 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1495 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1496 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1497 | |
1498 | # Brief documentation of the typical targets used | |
1499 | # --------------------------------------------------------------------------- | |
1500 | ||
5dffbe81 | 1501 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1502 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1503 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1504 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1505 | |
fe69b420 | 1506 | PHONY += help |
1da177e4 LT |
1507 | help: |
1508 | @echo 'Cleaning targets:' | |
5ea084ef | 1509 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1510 | @echo ' enough build support to build external modules' |
5ea084ef | 1511 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1512 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1513 | @echo '' |
1514 | @echo 'Configuration targets:' | |
1515 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1516 | @echo '' | |
1517 | @echo 'Other generic targets:' | |
1518 | @echo ' all - Build all targets marked with [*]' | |
1519 | @echo '* vmlinux - Build the bare kernel' | |
1520 | @echo '* modules - Build all modules' | |
9cc5d74c | 1521 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1522 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1523 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1524 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1525 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1526 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1527 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1528 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1529 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1530 | @echo ' tags/TAGS - Generate tags file for editors' |
1531 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1532 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1533 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1534 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1535 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1536 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1537 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1538 | echo '' |
31b8cc80 | 1539 | @echo 'Static analysers:' |
1da177e4 LT |
1540 | @echo ' checkstack - Generate a list of stack hogs' |
1541 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1542 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1543 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1544 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1545 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1546 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1547 | @echo '' |
eb8305ae MM |
1548 | @echo 'Tools:' |
1549 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1550 | @echo '' | |
31b8cc80 | 1551 | @echo 'Kernel selftest:' |
e51d8dac SK |
1552 | @echo ' kselftest - Build and run kernel selftest' |
1553 | @echo ' Build, install, and boot kernel before' | |
1554 | @echo ' running kselftest on it' | |
1555 | @echo ' Run as root for full coverage' | |
1556 | @echo ' kselftest-all - Build kernel selftest' | |
1557 | @echo ' kselftest-install - Build and install kernel selftest' | |
1558 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1559 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1560 | @echo ' kselftest to existing .config.' | |
5a5da78b | 1561 | @echo '' |
37c8a5fa RH |
1562 | @$(if $(dtstree), \ |
1563 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1564 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1565 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1566 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1567 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1568 | echo '') |
1569 | ||
31b8cc80 RD |
1570 | @echo 'Userspace tools targets:' |
1571 | @echo ' use "make tools/help"' | |
1572 | @echo ' or "cd tools; make help"' | |
1573 | @echo '' | |
1da177e4 | 1574 | @echo 'Kernel packaging:' |
000ec95f | 1575 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1576 | @echo '' |
1577 | @echo 'Documentation targets:' | |
cb43fb57 | 1578 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1579 | @echo '' |
01dee188 | 1580 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1581 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1582 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1583 | @echo '' |
1584 | @$(if $(boards), \ | |
1585 | $(foreach b, $(boards), \ | |
4234448b | 1586 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
1da177e4 | 1587 | echo '') |
5dffbe81 SB |
1588 | @$(if $(board-dirs), \ |
1589 | $(foreach b, $(board-dirs), \ | |
1590 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1591 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1592 | echo '') | |
1da177e4 LT |
1593 | |
1594 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1595 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1596 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
a64c0440 GU |
1597 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
1598 | @echo ' (sparse by default)' | |
701842e3 | 1599 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1600 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1601 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1602 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1603 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1604 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1605 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1606 | @echo '' |
1607 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1608 | @echo 'For further info see the ./README file' | |
1609 | ||
1610 | ||
5dffbe81 SB |
1611 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1612 | ||
1613 | help-boards: $(help-board-dirs) | |
1614 | ||
fbae4d58 | 1615 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1616 | |
1617 | $(help-board-dirs): help-%: | |
1618 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1619 | @$(if $(boards-per-dir), \ | |
1620 | $(foreach b, $(boards-per-dir), \ | |
1621 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1622 | echo '') | |
1623 | ||
1624 | ||
1da177e4 LT |
1625 | # Documentation targets |
1626 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1627 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1628 | linkcheckdocs dochelp refcheckdocs | |
22cba31b | 1629 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1630 | $(DOC_TARGETS): |
cb43fb57 | 1631 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1632 | |
67274c08 MY |
1633 | # Misc |
1634 | # --------------------------------------------------------------------------- | |
1635 | ||
1636 | PHONY += scripts_gdb | |
7a739ce5 | 1637 | scripts_gdb: prepare0 |
1e5ff84f | 1638 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1639 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1640 | |
1641 | ifdef CONFIG_GDB_SCRIPTS | |
1642 | all: scripts_gdb | |
1643 | endif | |
1644 | ||
1da177e4 LT |
1645 | else # KBUILD_EXTMOD |
1646 | ||
1647 | ### | |
1648 | # External module support. | |
1649 | # When building external modules the kernel used as basis is considered | |
1650 | # read-only, and no consistency checks are made and the make | |
1651 | # system is not used on the basis kernel. If updates are required | |
1652 | # in the basis kernel ordinary make commands (without M=...) must | |
1653 | # be used. | |
1654 | # | |
1655 | # The following are the only valid targets when building external | |
1656 | # modules. | |
1657 | # make M=dir clean Delete all automatically generated files | |
1658 | # make M=dir modules Make all modules in specified dir | |
1659 | # make M=dir Same as 'make M=dir modules' | |
1660 | # make M=dir modules_install | |
070b98bf | 1661 | # Install the modules built in the module directory |
1da177e4 LT |
1662 | # Assumes install directory is already created |
1663 | ||
1664 | # We are always building modules | |
1665 | KBUILD_MODULES := 1 | |
1da177e4 | 1666 | |
c99f3918 MY |
1667 | build-dirs := $(KBUILD_EXTMOD) |
1668 | PHONY += modules | |
48a0f727 | 1669 | modules: descend |
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) |
bc35d4bd | 1686 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps |
1da177e4 | 1687 | |
fe69b420 | 1688 | PHONY += help |
1da177e4 LT |
1689 | help: |
1690 | @echo ' Building external modules.' | |
1691 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1692 | @echo '' | |
1693 | @echo ' modules - default target, build the module(s)' | |
1694 | @echo ' modules_install - install the module' | |
1695 | @echo ' clean - remove generated files in module directory only' | |
1696 | @echo '' | |
06300b21 | 1697 | |
059bc9fc | 1698 | PHONY += prepare |
1da177e4 LT |
1699 | endif # KBUILD_EXTMOD |
1700 | ||
b1fbfcb4 MY |
1701 | # Single targets |
1702 | # --------------------------------------------------------------------------- | |
1703 | # To build individual files in subdirectories, you can do like this: | |
1704 | # | |
1705 | # make foo/bar/baz.s | |
1706 | # | |
1707 | # The supported suffixes for single-target are listed in 'single-targets' | |
1708 | # | |
1709 | # To build only under specific subdirectories, you can do like this: | |
1710 | # | |
1711 | # make foo/bar/baz/ | |
1712 | ||
1713 | ifdef single-build | |
1714 | ||
1715 | # .ko is special because modpost is needed | |
1716 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1717 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) | |
1718 | ||
1719 | $(single-ko): single_modpost | |
1720 | @: | |
1721 | $(single-no-ko): descend | |
1722 | @: | |
1723 | ||
1724 | ifeq ($(KBUILD_EXTMOD),) | |
1725 | # For the single build of in-tree modules, use a temporary file to avoid | |
1726 | # the situation of modules_install installing an invalid modules.order. | |
1727 | MODORDER := .modules.tmp | |
1728 | endif | |
1729 | ||
1730 | PHONY += single_modpost | |
1731 | single_modpost: $(single-no-ko) | |
1732 | $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) | |
1733 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1734 | ||
1735 | KBUILD_MODULES := 1 | |
1736 | ||
1737 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) | |
1738 | ||
1739 | # trim unrelated directories | |
1740 | build-dirs := $(foreach d, $(build-dirs), \ | |
1741 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
1742 | ||
1743 | endif | |
1744 | ||
b480fec9 MY |
1745 | ifndef CONFIG_MODULES |
1746 | KBUILD_MODULES := | |
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 | |
b1fbfcb4 | 1757 | $(Q)$(MAKE) $(build)=$@ \ |
20b1be59 | 1758 | single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ |
b1fbfcb4 | 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 | 1766 | clean: $(clean-dirs) |
88d7be03 | 1767 | $(call cmd,rmfiles) |
43f67c98 | 1768 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1769 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1770 | -o -name '*.ko.*' \ |
1771 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1772 | -o -name '*.dwo' -o -name '*.lst' \ |
bbc55bde | 1773 | -o -name '*.su' -o -name '*.mod' \ |
88d7be03 | 1774 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1775 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1776 | -o -name '*.asn1.[ch]' \ |
88d7be03 | 1777 | -o -name '*.symtypes' -o -name 'modules.order' \ |
8b41fc44 | 1778 | -o -name '.tmp_*.o.*' \ |
6b90bd4b | 1779 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1780 | -o -name '*.ll' \ |
88d7be03 MM |
1781 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1782 | ||
1da177e4 LT |
1783 | # Generate tags for editors |
1784 | # --------------------------------------------------------------------------- | |
a680eedc | 1785 | quiet_cmd_tags = GEN $@ |
858805b3 | 1786 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 1787 | |
f4ed1009 | 1788 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1789 | $(call cmd,tags) |
1790 | ||
eb8305ae MM |
1791 | # Script to generate missing namespace dependencies |
1792 | # --------------------------------------------------------------------------- | |
1793 | ||
1794 | PHONY += nsdeps | |
bff9c62b | 1795 | nsdeps: export KBUILD_NSDEPS=1 |
eb8305ae | 1796 | nsdeps: modules |
bff9c62b | 1797 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
eb8305ae | 1798 | |
1da177e4 LT |
1799 | # Scripts to check various things for consistency |
1800 | # --------------------------------------------------------------------------- | |
1801 | ||
279f3dd3 PF |
1802 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1803 | ||
1da177e4 | 1804 | includecheck: |
436f876c | 1805 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1806 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1807 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1808 | |
1809 | versioncheck: | |
2ee2d292 | 1810 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1811 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1812 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1813 | |
74425eee | 1814 | coccicheck: |
858805b3 | 1815 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 1816 | |
1da177e4 LT |
1817 | namespacecheck: |
1818 | $(PERL) $(srctree)/scripts/namespace.pl | |
1819 | ||
295ac051 AB |
1820 | export_report: |
1821 | $(PERL) $(srctree)/scripts/export_report.pl | |
1822 | ||
c398ff00 | 1823 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1824 | |
011e3a9a JD |
1825 | # UML needs a little special treatment here. It wants to use the host |
1826 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1827 | # else wants $(ARCH), including people doing cross-builds, which means | |
1828 | # that $(SUBARCH) doesn't work here. | |
1829 | ifeq ($(ARCH), um) | |
1830 | CHECKSTACK_ARCH := $(SUBARCH) | |
1831 | else | |
1832 | CHECKSTACK_ARCH := $(ARCH) | |
1833 | endif | |
1da177e4 LT |
1834 | checkstack: |
1835 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 1836 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1837 | |
7b8ea53d AW |
1838 | kernelrelease: |
1839 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1840 | |
cb58455c | 1841 | kernelversion: |
2244cbd8 | 1842 | @echo $(KERNELVERSION) |
1da177e4 | 1843 | |
c398ff00 MM |
1844 | image_name: |
1845 | @echo $(KBUILD_IMAGE) | |
1846 | ||
ea01fa9f | 1847 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1848 | |
1849 | ifeq ($(quiet),silent_) | |
1850 | tools_silent=s | |
1851 | endif | |
1852 | ||
ea01fa9f | 1853 | tools/: FORCE |
bf35182f | 1854 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1855 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
ea01fa9f BP |
1856 | |
1857 | tools/%: FORCE | |
bf35182f | 1858 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1859 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
ea01fa9f | 1860 | |
1da177e4 | 1861 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
0663c68c | 1862 | cmd_rmfiles = rm -rf $(rm-files) |
1da177e4 | 1863 | |
bc3c26fe | 1864 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1865 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1866 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1867 | $(KERNELRELEASE) |
50a8ec31 | 1868 | |
392885ee MY |
1869 | # read saved command lines for existing targets |
1870 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1871 | |
b999923c | 1872 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 1873 | |
46b7c492 | 1874 | endif # config-build |
2042b548 MY |
1875 | endif # mixed-build |
1876 | endif # need-sub-make | |
1da177e4 | 1877 | |
4f193362 | 1878 | PHONY += FORCE |
1da177e4 | 1879 | FORCE: |
4f193362 | 1880 | |
bd412d81 | 1881 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1882 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1883 | .PHONY: $(PHONY) |