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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 | 2 | VERSION = 5 |
3650b228 | 3 | PATCHLEVEL = 10 |
55922c9d | 4 | SUBLEVEL = 0 |
2c85ebc5 | 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 | |
efbf9726 | 268 | no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease |
394053f4 | 269 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
2c1f4f12 | 270 | |
2042b548 MY |
271 | config-build := |
272 | mixed-build := | |
273 | need-config := 1 | |
274 | may-sync-config := 1 | |
394053f4 | 275 | single-build := |
2c1f4f12 MY |
276 | |
277 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
278 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 279 | need-config := |
2c1f4f12 MY |
280 | endif |
281 | endif | |
282 | ||
d7942413 MY |
283 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
284 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 285 | may-sync-config := |
d7942413 MY |
286 | endif |
287 | endif | |
288 | ||
289 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 290 | may-sync-config := |
d7942413 MY |
291 | endif |
292 | ||
2c1f4f12 | 293 | ifeq ($(KBUILD_EXTMOD),) |
efbf9726 | 294 | ifneq ($(filter %config,$(MAKECMDGOALS)),) |
2042b548 | 295 | config-build := 1 |
2c1f4f12 | 296 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 297 | mixed-build := 1 |
2c1f4f12 MY |
298 | endif |
299 | endif | |
300 | endif | |
22340a06 | 301 | |
394053f4 MY |
302 | # We cannot build single targets and the others at the same time |
303 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
304 | single-build := 1 | |
305 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
306 | mixed-build := 1 | |
307 | endif | |
308 | endif | |
309 | ||
22340a06 MY |
310 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
311 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
312 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 313 | mixed-build := 1 |
22340a06 MY |
314 | endif |
315 | endif | |
316 | ||
2c1f4f12 MY |
317 | # install and modules_install need also be processed one by one |
318 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
319 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 320 | mixed-build := 1 |
2c1f4f12 MY |
321 | endif |
322 | endif | |
323 | ||
2042b548 | 324 | ifdef mixed-build |
2c1f4f12 MY |
325 | # =========================================================================== |
326 | # We're called with mixed targets (*config and build targets). | |
327 | # Handle them one by one. | |
328 | ||
329 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
330 | ||
121c2a13 | 331 | $(MAKECMDGOALS): __build_one_by_one |
2c1f4f12 MY |
332 | @: |
333 | ||
334 | __build_one_by_one: | |
335 | $(Q)set -e; \ | |
336 | for i in $(MAKECMDGOALS); do \ | |
337 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
338 | done | |
339 | ||
2042b548 | 340 | else # !mixed-build |
2c1f4f12 | 341 | |
2c1f4f12 MY |
342 | include scripts/Kbuild.include |
343 | ||
344 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
345 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
346 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
347 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
348 | ||
b2d35fa5 | 349 | include scripts/subarch.include |
1da177e4 LT |
350 | |
351 | # Cross compiling and selecting different set of gcc/bin-utils | |
352 | # --------------------------------------------------------------------------- | |
353 | # | |
354 | # When performing cross compilation for other architectures ARCH shall be set | |
355 | # to the target architecture. (See arch/* for the possibilities). | |
356 | # ARCH can be set during invocation of make: | |
357 | # make ARCH=ia64 | |
358 | # Another way is to have ARCH set in the environment. | |
359 | # The default ARCH is the host where make is executed. | |
360 | ||
361 | # CROSS_COMPILE specify the prefix used for all executables used | |
362 | # during compilation. Only gcc and related bin-utils executables | |
363 | # are prefixed with $(CROSS_COMPILE). | |
364 | # CROSS_COMPILE can be set on the command line | |
365 | # make CROSS_COMPILE=ia64-linux- | |
366 | # Alternatively CROSS_COMPILE can be set in the environment. | |
367 | # Default value for CROSS_COMPILE is not to prefix executables | |
368 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 369 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
370 | |
371 | # Architecture as present in compile.h | |
6752ed90 TG |
372 | UTS_MACHINE := $(ARCH) |
373 | SRCARCH := $(ARCH) | |
1da177e4 | 374 | |
d746d647 SR |
375 | # Additional ARCH settings for x86 |
376 | ifeq ($(ARCH),i386) | |
377 | SRCARCH := x86 | |
378 | endif | |
379 | ifeq ($(ARCH),x86_64) | |
380 | SRCARCH := x86 | |
381 | endif | |
74b469f2 | 382 | |
5e538790 | 383 | # Additional ARCH settings for sparc |
e69f58c0 NK |
384 | ifeq ($(ARCH),sparc32) |
385 | SRCARCH := sparc | |
386 | endif | |
a439fe51 | 387 | ifeq ($(ARCH),sparc64) |
5e538790 | 388 | SRCARCH := sparc |
a439fe51 | 389 | endif |
2fb9b1bd | 390 | |
3cc000b5 PM |
391 | # Additional ARCH settings for sh |
392 | ifeq ($(ARCH),sh64) | |
393 | SRCARCH := sh | |
394 | endif | |
395 | ||
14cdd3c4 | 396 | KCONFIG_CONFIG ?= .config |
41263fc6 | 397 | export KCONFIG_CONFIG |
14cdd3c4 | 398 | |
2a86f661 MY |
399 | # Default file for 'make defconfig'. This may be overridden by arch-Makefile. |
400 | export KBUILD_DEFCONFIG := defconfig | |
401 | ||
1da177e4 | 402 | # SHELL used by kbuild |
858805b3 | 403 | CONFIG_SHELL := sh |
1da177e4 | 404 | |
6d79a7b4 MY |
405 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
406 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
407 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 408 | |
a0d1c951 MY |
409 | ifneq ($(LLVM),) |
410 | HOSTCC = clang | |
411 | HOSTCXX = clang++ | |
412 | else | |
413 | HOSTCC = gcc | |
414 | HOSTCXX = g++ | |
415 | endif | |
7f3a59db MY |
416 | |
417 | export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ | |
418 | -O2 -fomit-frame-pointer -std=gnu89 | |
419 | export KBUILD_USERLDFLAGS := | |
420 | ||
421 | KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) | |
735aab1e | 422 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
f92d19e0 LA |
423 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
424 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 425 | |
1da177e4 | 426 | # Make variables (CC, etc...) |
1da177e4 | 427 | CPP = $(CC) -E |
a0d1c951 MY |
428 | ifneq ($(LLVM),) |
429 | CC = clang | |
430 | LD = ld.lld | |
431 | AR = llvm-ar | |
432 | NM = llvm-nm | |
433 | OBJCOPY = llvm-objcopy | |
434 | OBJDUMP = llvm-objdump | |
435 | READELF = llvm-readelf | |
a0d1c951 MY |
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 | |
eefb8c12 | 444 | READELF = $(CROSS_COMPILE)readelf |
a0d1c951 MY |
445 | STRIP = $(CROSS_COMPILE)strip |
446 | endif | |
e83b9f55 | 447 | PAHOLE = pahole |
c9a0f3b8 | 448 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids |
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 |
e4a42c82 DE |
459 | KGZIP = gzip |
460 | KBZIP2 = bzip2 | |
461 | KLZOP = lzop | |
8dfb61dc DE |
462 | LZMA = lzma |
463 | LZ4 = lz4c | |
464 | XZ = xz | |
48f7ddf7 | 465 | ZSTD = zstd |
8dfb61dc | 466 | |
80a7d1d9 | 467 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 468 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
0c22be07 | 469 | NOSTDINC_FLAGS := |
6588169d SR |
470 | CFLAGS_MODULE = |
471 | AFLAGS_MODULE = | |
472 | LDFLAGS_MODULE = | |
1da177e4 LT |
473 | CFLAGS_KERNEL = |
474 | AFLAGS_KERNEL = | |
b36fad65 | 475 | LDFLAGS_vmlinux = |
1da177e4 | 476 | |
4be6d2ac LO |
477 | # Prefer linux-backports-modules |
478 | ifneq ($(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 := \ |
4be6d2ac | 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 | |
4be6d2ac 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 \ |
172aad81 | 509 | -Werror=return-type -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 | 516 | KBUILD_LDFLAGS_MODULE := |
d503ac53 | 517 | KBUILD_LDFLAGS := |
5241ab4c | 518 | CLANG_FLAGS := |
1da177e4 | 519 | |
aa824e0c | 520 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
d9b5665f | 521 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL |
94f7345b | 522 | export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
48f7ddf7 | 523 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
7bac9870 | 524 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
1da177e4 | 525 | |
d503ac53 | 526 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 | 527 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
222d394d | 528 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 529 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 530 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
1da177e4 | 531 | |
1da177e4 LT |
532 | # Files to ignore in find ... statements |
533 | ||
ae63b2d7 PB |
534 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
535 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
536 | -prune -o | |
450c6076 JJ |
537 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
538 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
539 | |
540 | # =========================================================================== | |
541 | # Rules shared between *config targets and build targets | |
542 | ||
312a3d09 | 543 | # Basic helpers built in scripts/basic/ |
4f193362 | 544 | PHONY += scripts_basic |
1da177e4 LT |
545 | scripts_basic: |
546 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 547 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 548 | |
4f193362 | 549 | PHONY += outputmakefile |
e8e83a23 | 550 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
551 | # outputmakefile generates a Makefile in the output directory, if using a |
552 | # separate output directory. This allows convenient use of make in the | |
553 | # output directory. | |
3a51ff34 VK |
554 | # At the same time when output Makefile generated, generate .gitignore to |
555 | # ignore whole output directory | |
1da177e4 | 556 | outputmakefile: |
051f278e | 557 | ifdef building_out_of_srctree |
e8e83a23 MY |
558 | $(Q)if [ -f $(srctree)/.config -o \ |
559 | -d $(srctree)/include/config -o \ | |
560 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
561 | echo >&2 "***"; \ | |
562 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
563 | echo >&2 "*** in $(abs_srctree)";\ | |
564 | echo >&2 "***"; \ | |
565 | false; \ | |
566 | fi | |
92979997 | 567 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 568 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
156e7cbb MY |
569 | $(Q)test -e .gitignore || \ |
570 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 571 | endif |
1da177e4 | 572 | |
99516742 | 573 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 574 | ifneq ($(CROSS_COMPILE),) |
5241ab4c | 575 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 576 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
ca9b31f6 | 577 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
ef8c4ed9 | 578 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
579 | endif |
580 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 581 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 582 | endif |
7e20e47c | 583 | ifneq ($(LLVM_IAS),1) |
238bcbc4 | 584 | CLANG_FLAGS += -no-integrated-as |
876a0600 | 585 | endif |
589834b3 | 586 | CLANG_FLAGS += -Werror=unknown-warning-option |
238bcbc4 MY |
587 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
588 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 589 | export CLANG_FLAGS |
ae6b289a CF |
590 | endif |
591 | ||
315bab4e MY |
592 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
593 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
594 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
595 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
902a6898 | 596 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) |
315bab4e | 597 | |
2042b548 | 598 | ifdef config-build |
1da177e4 LT |
599 | # =========================================================================== |
600 | # *config targets only - make sure prerequisites are updated, and descend | |
601 | # in scripts/kconfig to make the *config target | |
602 | ||
603 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
604 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
605 | # used for 'make defconfig' | |
a436bb7b | 606 | include arch/$(SRCARCH)/Makefile |
315bab4e | 607 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 608 | |
36de077b | 609 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
610 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
611 | ||
36de077b | 612 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
613 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
614 | ||
2042b548 | 615 | else #!config-build |
1da177e4 LT |
616 | # =========================================================================== |
617 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
618 | # targets and others. In general all targets except *config targets. | |
619 | ||
2c1f4f12 | 620 | # If building an external module we do not care about the all: rule |
121c2a13 | 621 | # but instead __all depend on modules |
2c1f4f12 MY |
622 | PHONY += all |
623 | ifeq ($(KBUILD_EXTMOD),) | |
121c2a13 | 624 | __all: all |
2c1f4f12 | 625 | else |
121c2a13 | 626 | __all: modules |
2c1f4f12 MY |
627 | endif |
628 | ||
629 | # Decide whether to build built-in, modular, or both. | |
630 | # Normally, just do built-in. | |
631 | ||
632 | KBUILD_MODULES := | |
633 | KBUILD_BUILTIN := 1 | |
634 | ||
635 | # If we have only "make modules", don't compile built-in objects. | |
2c1f4f12 | 636 | ifeq ($(MAKECMDGOALS),modules) |
4b50c8c4 | 637 | KBUILD_BUILTIN := |
2c1f4f12 MY |
638 | endif |
639 | ||
640 | # If we have "make <whatever> modules", compile modules | |
641 | # in addition to whatever we do anyway. | |
642 | # Just "make" or "make all" shall build modules as well | |
643 | ||
6ad7cbc0 | 644 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
645 | KBUILD_MODULES := 1 |
646 | endif | |
647 | ||
648 | ifeq ($(MAKECMDGOALS),) | |
649 | KBUILD_MODULES := 1 | |
650 | endif | |
651 | ||
652 | export KBUILD_MODULES KBUILD_BUILTIN | |
653 | ||
2042b548 | 654 | ifdef need-config |
d93a18f2 MY |
655 | include include/config/auto.conf |
656 | endif | |
657 | ||
1da177e4 | 658 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 659 | # Objects we will link into vmlinux / subdirs we need to visit |
23febe37 | 660 | core-y := init/ usr/ |
4be6d2ac | 661 | drivers-y := drivers/ sound/ ubuntu/ |
d93a18f2 | 662 | drivers-$(CONFIG_SAMPLES) += samples/ |
95fb6317 | 663 | drivers-y += net/ virt/ |
1da177e4 | 664 | libs-y := lib/ |
1da177e4 LT |
665 | endif # KBUILD_EXTMOD |
666 | ||
315bab4e MY |
667 | # The all: target is the default when no target is given on the |
668 | # command line. | |
669 | # This allow a user to issue only 'make' to build a kernel including modules | |
670 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
671 | all: vmlinux | |
672 | ||
673 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
674 | $(call cc-option,-fno-tree-loop-im) \ | |
675 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 676 | export CFLAGS_GCOV |
315bab4e | 677 | |
b1f4ff74 PZ |
678 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
679 | ifdef CONFIG_FUNCTION_TRACER | |
680 | CC_FLAGS_FTRACE := -pg | |
681 | endif | |
682 | ||
669e06b1 MY |
683 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
684 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
685 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
686 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
687 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
688 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
689 | export RETPOLINE_CFLAGS | |
690 | export RETPOLINE_VDSO_CFLAGS | |
691 | ||
315bab4e | 692 | include arch/$(SRCARCH)/Makefile |
1da177e4 | 693 | |
2042b548 MY |
694 | ifdef need-config |
695 | ifdef may-sync-config | |
315bab4e MY |
696 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
697 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
698 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 699 | include include/config/auto.conf.cmd |
1da177e4 | 700 | |
05850719 MY |
701 | $(KCONFIG_CONFIG): |
702 | @echo >&2 '***' | |
703 | @echo >&2 '*** Configuration file "$@" not found!' | |
704 | @echo >&2 '***' | |
705 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
706 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
707 | @echo >&2 '***' | |
708 | @/bin/false | |
1da177e4 | 709 | |
61277981 UM |
710 | # The actual configuration files used during the build are stored in |
711 | # include/generated/ and include/config/. Update them if .config is newer than | |
712 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
713 | # |
714 | # This exploits the 'multi-target pattern rule' trick. | |
715 | # The syncconfig should be executed only once to make all the targets. | |
f463c351 | 716 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
23cd88c9 MY |
717 | quiet_cmd_syncconfig = SYNC $@ |
718 | cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig | |
719 | ||
3044dd05 | 720 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) |
23cd88c9 | 721 | +$(call cmd,syncconfig) |
2042b548 | 722 | else # !may-sync-config |
d7942413 MY |
723 | # External modules and some install targets need include/generated/autoconf.h |
724 | # and include/config/auto.conf but do not care if they are up-to-date. | |
725 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
726 | PHONY += include/config/auto.conf |
727 | ||
728 | include/config/auto.conf: | |
264a2683 | 729 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
730 | echo >&2; \ |
731 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
732 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
733 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
734 | echo >&2 ; \ | |
9ee4e336 SR |
735 | /bin/false) |
736 | ||
d7942413 | 737 | endif # may-sync-config |
2042b548 | 738 | endif # need-config |
1da177e4 | 739 | |
a1c48bb1 | 740 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 741 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
742 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
743 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 744 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 745 | |
15f5db60 MY |
746 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
747 | KBUILD_CFLAGS += -O2 | |
748 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 | |
749 | KBUILD_CFLAGS += -O3 | |
750 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
751 | KBUILD_CFLAGS += -Os | |
815eb71e | 752 | endif |
1da177e4 | 753 | |
69102311 JK |
754 | # Tell gcc to never replace conditional load with a non-conditional one |
755 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
b1112139 | 756 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
69102311 | 757 | |
1873e870 AK |
758 | ifdef CONFIG_READABLE_ASM |
759 | # Disable optimizations that make assembler listings hard to read. | |
760 | # reorder blocks reorders the control in the function | |
761 | # ipa clone creates specialized cloned functions | |
762 | # partial inlining inlines only parts of functions | |
763 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
764 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
765 | $(call cc-option,-fno-partial-inlining) | |
766 | endif | |
767 | ||
08f67461 | 768 | ifneq ($(CONFIG_FRAME_WARN),0) |
a83e4ca2 | 769 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
35bb5b1e AK |
770 | endif |
771 | ||
893ab004 | 772 | stackp-flags-y := -fno-stack-protector |
050e9baa LT |
773 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
774 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
775 | |
776 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 777 | |
076f421d | 778 | ifdef CONFIG_CC_IS_CLANG |
a1494304 MY |
779 | KBUILD_CPPFLAGS += -Qunused-arguments |
780 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
781 | KBUILD_CFLAGS += -Wno-gnu | |
cfe17c9b MY |
782 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
783 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
784 | # See modpost pattern 2 | |
a1494304 | 785 | KBUILD_CFLAGS += -mno-global-merge |
cfe17c9b MY |
786 | else |
787 | ||
788 | # These warnings generated too much noise in a regular build. | |
789 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 790 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
e2079e93 NC |
791 | |
792 | # Warn about unmarked fall-throughs in switch statement. | |
793 | # Disabled for clang while comment to attribute conversion happens and | |
794 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. | |
795 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) | |
cfe17c9b MY |
796 | endif |
797 | ||
0a5f4176 | 798 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 799 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 800 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 801 | else |
7e9501fd RV |
802 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
803 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
804 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
805 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
806 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
807 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 808 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 809 | endif |
7e9501fd | 810 | endif |
1da177e4 | 811 | |
f0fe00d4 | 812 | # Initialize all stack variables with a 0xAA pattern. |
813 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
709a972e KC |
814 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
815 | endif | |
816 | ||
f0fe00d4 | 817 | # Initialize all stack variables with a zero value. |
818 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
819 | # Future support for zero initialization is still being debated, see | |
820 | # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being | |
821 | # renamed or dropped. | |
822 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero | |
823 | KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang | |
824 | endif | |
825 | ||
121c5d08 MW |
826 | # Workaround for GCC versions < 5.0 |
827 | # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801 | |
828 | ifdef CONFIG_CC_IS_GCC | |
829 | DEBUG_CFLAGS := $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments)) | |
830 | endif | |
2062afb4 | 831 | |
1da177e4 | 832 | ifdef CONFIG_DEBUG_INFO |
695afd3d | 833 | |
866ced95 | 834 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 835 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 836 | else |
1e88e415 | 837 | DEBUG_CFLAGS += -g |
866ced95 | 838 | endif |
695afd3d | 839 | |
b8a90923 | 840 | ifneq ($(LLVM_IAS),1) |
2288328c | 841 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
b8a90923 | 842 | endif |
695afd3d | 843 | |
bfaf2dd3 | 844 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 845 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 846 | endif |
1da177e4 | 847 | |
d6f4ceb7 | 848 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 849 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 850 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
851 | endif |
852 | ||
10e68b02 ND |
853 | ifdef CONFIG_DEBUG_INFO_COMPRESSED |
854 | DEBUG_CFLAGS += -gz=zlib | |
7b169944 | 855 | KBUILD_AFLAGS += -gz=zlib |
10e68b02 ND |
856 | KBUILD_LDFLAGS += --compress-debug-sections=zlib |
857 | endif | |
858 | ||
695afd3d SD |
859 | endif # CONFIG_DEBUG_INFO |
860 | ||
1e88e415 MY |
861 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
862 | export DEBUG_CFLAGS | |
863 | ||
606576ce | 864 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
865 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
866 | # gcc 5 supports generating the mcount tables directly | |
867 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
868 | CC_FLAGS_FTRACE += -mrecord-mcount | |
869 | export CC_USING_RECORD_MCOUNT := 1 | |
870 | endif | |
2f4df001 VG |
871 | ifdef CONFIG_HAVE_NOP_MCOUNT |
872 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
873 | CC_FLAGS_FTRACE += -mnop-mcount | |
874 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
875 | endif | |
876 | endif | |
07d04081 | 877 | endif |
a2546fae | 878 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
879 | ifeq ($(call cc-option-yn, -mfentry),y) |
880 | CC_FLAGS_FTRACE += -mfentry | |
881 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
882 | endif | |
a2546fae | 883 | endif |
f28bc3c3 VG |
884 | export CC_FLAGS_FTRACE |
885 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
886 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 887 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 888 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
889 | BUILD_C_RECORDMCOUNT := y |
890 | export BUILD_C_RECORDMCOUNT | |
891 | endif | |
892 | endif | |
16444a8a ACM |
893 | endif |
894 | ||
91341d4b SR |
895 | # We trigger additional mismatches with less inlining |
896 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
897 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
898 | endif | |
899 | ||
90ad4052 | 900 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
901 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
902 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
903 | endif |
904 | ||
d08b9f0c ST |
905 | ifdef CONFIG_SHADOW_CALL_STACK |
906 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack | |
907 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
908 | export CC_FLAGS_SCS | |
909 | endif | |
910 | ||
09c60546 FT |
911 | ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B |
912 | KBUILD_CFLAGS += -falign-functions=32 | |
913 | endif | |
914 | ||
e8e69931 | 915 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 916 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 917 | |
1da177e4 | 918 | # warn about C99 declaration after statement |
a33e7ae2 | 919 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 920 | |
0bb95f80 | 921 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 922 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 923 | |
070b98bf | 924 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 925 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 926 | |
217c3e01 SR |
927 | # disable stringop warnings in gcc 8+ |
928 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
929 | ||
5c45de21 LT |
930 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
931 | KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) | |
44720996 | 932 | KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) |
5a76021c | 933 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
5c45de21 | 934 | |
adc71920 LT |
935 | # Another good warning that we'll want to enable eventually |
936 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
937 | ||
78a5255f LT |
938 | # Enabled with W=2, disabled by default as noisy |
939 | KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) | |
940 | ||
fe8d0a41 | 941 | # disable invalid "can't wrap" optimizations for signed / pointers |
8b42cf2f | 942 | KBUILD_CFLAGS += -fno-strict-overflow |
d0115552 | 943 | |
3ce120b1 | 944 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
7d4eb0d8 | 945 | KBUILD_CFLAGS += -fno-stack-check |
3ce120b1 | 946 | |
8f7f5c9f AK |
947 | # conserve stack if available |
948 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
949 | ||
fe7c36c7 | 950 | # Prohibit date/time macros, which would make the build non-deterministic |
87de84c9 | 951 | KBUILD_CFLAGS += -Werror=date-time |
fe7c36c7 | 952 | |
ea8daa7b DW |
953 | # enforce correct pointer usage |
954 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
955 | ||
c834f0e8 KC |
956 | # Require designated initializers for all marked structures |
957 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
958 | ||
a73619a8 | 959 | # change __FILE__ to the relative path from the srctree |
a716bd74 | 960 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
a73619a8 | 961 | |
29be86d7 SF |
962 | # ensure -fcf-protection is disabled when using retpoline as it is |
963 | # incompatible with -mindirect-branch=thunk-extern | |
964 | ifdef CONFIG_RETPOLINE | |
965 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
966 | endif | |
967 | ||
e0fe0bbe MY |
968 | # include additional Makefiles when needed |
969 | include-y := scripts/Makefile.extrawarn | |
970 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan | |
971 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
972 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan | |
973 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
974 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins | |
975 | ||
976 | include $(addprefix $(srctree)/, $(include-y)) | |
a86fe353 | 977 | |
132305b3 MY |
978 | # scripts/Makefile.gcc-plugins is intentionally included last. |
979 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
980 | # from the clean source tree, the GCC plugins do not exist at this point. | |
a86fe353 | 981 | |
8cc7af75 MY |
982 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
983 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
984 | KBUILD_AFLAGS += $(KAFLAGS) | |
985 | KBUILD_CFLAGS += $(KCFLAGS) | |
52bcc330 | 986 | |
a9684337 BW |
987 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 |
988 | LDFLAGS_vmlinux += --build-id=sha1 | |
18991197 | 989 | |
5d7d18f5 | 990 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 991 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
992 | endif |
993 | ||
5cf896fb PC |
994 | ifeq ($(CONFIG_RELR),y) |
995 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr | |
996 | endif | |
997 | ||
59612b24 NC |
998 | # We never want expected sections to be placed heuristically by the |
999 | # linker. All sections should be explicitly named in the linker script. | |
1000 | ifdef CONFIG_LD_ORPHAN_WARN | |
1001 | LDFLAGS_vmlinux += --orphan-handling=warn | |
1002 | endif | |
1003 | ||
7f3a59db | 1004 | # Align the bit size of userspace programs with the kernel |
7f58b487 MY |
1005 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
1006 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
7f3a59db | 1007 | |
80591e61 LVO |
1008 | # make the checker run with the right architecture |
1009 | CHECKFLAGS += --arch=$(ARCH) | |
1010 | ||
14516765 LVO |
1011 | # insure the checker run with the right endianness |
1012 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1013 | ||
1f2f01b1 LVO |
1014 | # the checker needs the correct machine size |
1015 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1016 | ||
1da177e4 | 1017 | # Default kernel image to build when no specific target is given. |
070b98bf | 1018 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
1019 | # set in the environment |
1020 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1021 | # this default value | |
1022 | export KBUILD_IMAGE ?= vmlinux | |
1023 | ||
1024 | # | |
1025 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1026 | # images. Default is /boot, but you can set it to other values | |
1027 | export INSTALL_PATH ?= /boot | |
1028 | ||
f4d4ffc0 JC |
1029 | # |
1030 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1031 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1032 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1033 | # | |
1034 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1035 | ||
1da177e4 LT |
1036 | # |
1037 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1038 | # relocations required by build roots. This is not defined in the | |
070b98bf | 1039 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
1040 | # |
1041 | ||
df9df036 | 1042 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
1043 | export MODLIB |
1044 | ||
ac031f26 | 1045 | # |
3fbb43df MY |
1046 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
1047 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
1048 | # the default option --strip-debug will be used. Otherwise, | |
1049 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 1050 | |
ac031f26 TT |
1051 | ifdef INSTALL_MOD_STRIP |
1052 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 1053 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 1054 | else |
2ea03891 | 1055 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
1056 | endif # INSTALL_MOD_STRIP=1 |
1057 | else | |
2ea03891 | 1058 | mod_strip_cmd = true |
ac031f26 TT |
1059 | endif # INSTALL_MOD_STRIP |
1060 | export mod_strip_cmd | |
1061 | ||
beb50df3 BJ |
1062 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
1063 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
1064 | # or CONFIG_MODULE_COMPRESS_XZ. | |
1065 | ||
1066 | mod_compress_cmd = true | |
1067 | ifdef CONFIG_MODULE_COMPRESS | |
1068 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
e4a42c82 | 1069 | mod_compress_cmd = $(KGZIP) -n -f |
beb50df3 BJ |
1070 | endif # CONFIG_MODULE_COMPRESS_GZIP |
1071 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
8dfb61dc | 1072 | mod_compress_cmd = $(XZ) -f |
beb50df3 BJ |
1073 | endif # CONFIG_MODULE_COMPRESS_XZ |
1074 | endif # CONFIG_MODULE_COMPRESS | |
1075 | export mod_compress_cmd | |
1076 | ||
d9d8d7ed | 1077 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
1078 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
1079 | ||
1080 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
1081 | else |
1082 | mod_sign_cmd = true | |
1083 | endif | |
1084 | export mod_sign_cmd | |
1085 | ||
056d28d1 REB |
1086 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
1087 | ||
33a57ce0 JO |
1088 | has_libelf = $(call try-run,\ |
1089 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) | |
1090 | ||
9f0c18ae | 1091 | ifdef CONFIG_STACK_VALIDATION |
9f0c18ae JP |
1092 | ifeq ($(has_libelf),1) |
1093 | objtool_target := tools/objtool FORCE | |
1094 | else | |
9f0c18ae JP |
1095 | SKIP_STACK_VALIDATION := 1 |
1096 | export SKIP_STACK_VALIDATION | |
1097 | endif | |
1098 | endif | |
1099 | ||
017dab34 | 1100 | ifdef CONFIG_BPF |
33a57ce0 JO |
1101 | ifdef CONFIG_DEBUG_INFO_BTF |
1102 | ifeq ($(has_libelf),1) | |
1103 | resolve_btfids_target := tools/bpf/resolve_btfids FORCE | |
1104 | else | |
1105 | ERROR_RESOLVE_BTFIDS := 1 | |
1106 | endif | |
017dab34 JO |
1107 | endif # CONFIG_DEBUG_INFO_BTF |
1108 | endif # CONFIG_BPF | |
33a57ce0 | 1109 | |
e00d8880 | 1110 | PHONY += prepare0 |
e2a666d5 | 1111 | |
394053f4 | 1112 | export MODORDER := $(extmod-prefix)modules.order |
bc35d4bd | 1113 | export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps |
47801c97 | 1114 | |
1da177e4 | 1115 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 1116 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 | 1117 | |
23febe37 | 1118 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ |
1da177e4 | 1119 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
95fb6317 | 1120 | $(libs-y) $(libs-m))) |
1da177e4 | 1121 | |
1eaca4b9 | 1122 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
23febe37 | 1123 | $(patsubst %/,%,$(filter %/, $(core-) \ |
95fb6317 | 1124 | $(drivers-) $(libs-)))) |
1da177e4 | 1125 | |
b2c88554 MY |
1126 | subdir-modorder := $(addsuffix modules.order,$(filter %/, \ |
1127 | $(core-y) $(core-m) $(libs-y) $(libs-m) \ | |
1128 | $(drivers-y) $(drivers-m))) | |
1da177e4 | 1129 | |
c99f3918 | 1130 | build-dirs := $(vmlinux-dirs) |
76cd306d | 1131 | clean-dirs := $(vmlinux-alldirs) |
c99f3918 | 1132 | |
f0d50ca0 MY |
1133 | # Externally visible symbols (used by link-vmlinux.sh) |
1134 | KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) | |
1135 | KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) | |
7273ad2b | 1136 | ifdef CONFIG_MODULES |
f0d50ca0 MY |
1137 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
1138 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
7273ad2b | 1139 | else |
f0d50ca0 | 1140 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
7273ad2b | 1141 | endif |
f0d50ca0 | 1142 | KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) |
1da177e4 | 1143 | |
f0d50ca0 | 1144 | export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS |
95698570 | 1145 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
85f0ae7e | 1146 | # used by scripts/Makefile.package |
233c741d | 1147 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
9bb48247 | 1148 | |
d151e971 | 1149 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1150 | |
3fdc7d3f MY |
1151 | # Recurse until adjust_autoksyms.sh is satisfied |
1152 | PHONY += autoksyms_recursive | |
2441e78b | 1153 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
1f50b80a MY |
1154 | # For the kernel to actually contain only the needed exported symbols, |
1155 | # we have to build modules as well to determine what those symbols are. | |
1156 | # (this can be evaluated only once include/config/auto.conf has been included) | |
fb2d99be MY |
1157 | KBUILD_MODULES := 1 |
1158 | ||
1159 | autoksyms_recursive: descend modules.order | |
1160 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1161 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1f50b80a MY |
1162 | endif |
1163 | ||
07a422bb MY |
1164 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1165 | ||
88694cff QP |
1166 | quiet_cmd_autoksyms_h = GEN $@ |
1167 | cmd_autoksyms_h = mkdir -p $(dir $@); \ | |
1168 | $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ | |
1169 | ||
07a422bb | 1170 | $(autoksyms_h): |
88694cff | 1171 | $(call cmd,autoksyms_h) |
23121ca2 | 1172 | |
fbe6e37d NP |
1173 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1174 | ||
1175 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1176 | cmd_link-vmlinux = \ |
3ec8a5b3 | 1177 | $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ |
fbe6e37d | 1178 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1179 | |
3fdc7d3f | 1180 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1181 | +$(call if_changed,link-vmlinux) |
741f98fe | 1182 | |
392885ee MY |
1183 | targets := vmlinux |
1184 | ||
38385f8f | 1185 | # The actual objects are generated when descending, |
1da177e4 | 1186 | # make sure no implicit rule kicks in |
b2c88554 | 1187 | $(sort $(vmlinux-deps) $(subdir-modorder)): descend ; |
1da177e4 | 1188 | |
ba97df45 | 1189 | filechk_kernel.release = \ |
0d0e7718 | 1190 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1191 | |
83a35e36 | 1192 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1193 | include/config/kernel.release: FORCE |
0d0e7718 | 1194 | $(call filechk,kernel.release) |
cb58455c | 1195 | |
d8821622 MY |
1196 | # Additional helpers built in scripts/ |
1197 | # Carefully list dependencies so we do not try to build scripts twice | |
1198 | # in parallel | |
1199 | PHONY += scripts | |
60df1aee | 1200 | scripts: scripts_basic scripts_dtc |
d8821622 | 1201 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1202 | |
1da177e4 | 1203 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1204 | # or the modules are listed in "prepare". |
1205 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1206 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1207 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1208 | |
a5139fb3 | 1209 | PHONY += prepare archprepare |
5bb78269 | 1210 | |
36de077b | 1211 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
3044dd05 MY |
1212 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
1213 | include/generated/autoconf.h | |
5bb78269 | 1214 | |
65bba042 | 1215 | prepare0: archprepare |
60df1aee | 1216 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1217 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1218 | |
1da177e4 | 1219 | # All the preparing.. |
33a57ce0 | 1220 | prepare: prepare0 prepare-objtool prepare-resolve_btfids |
b9ab5ebb | 1221 | |
2c1f4f12 | 1222 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1223 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1224 | ||
2c1f4f12 MY |
1225 | PHONY += asm-generic uapi-asm-generic |
1226 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1227 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1228 | generic=include/asm-generic | |
2c1f4f12 | 1229 | uapi-asm-generic: |
037fc336 MY |
1230 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1231 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1232 | |
33a57ce0 | 1233 | PHONY += prepare-objtool prepare-resolve_btfids |
3b27a0c8 | 1234 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1235 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1236 | ifdef CONFIG_UNWINDER_ORC | |
1237 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1238 | @false | |
1239 | else | |
1240 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1241 | endif | |
1242 | endif | |
1da177e4 | 1243 | |
33a57ce0 JO |
1244 | prepare-resolve_btfids: $(resolve_btfids_target) |
1245 | ifeq ($(ERROR_RESOLVE_BTFIDS),1) | |
1246 | @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1247 | @false | |
1248 | endif | |
1da177e4 LT |
1249 | # Generate some files |
1250 | # --------------------------------------------------------------------------- | |
1251 | ||
1252 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1253 | # needs to be updated, so this check is forced on all builds | |
1254 | ||
1255 | uts_len := 64 | |
63104eec SR |
1256 | define filechk_utsrelease.h |
1257 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1258 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1259 | exit 1; \ | |
1260 | fi; \ | |
ad774086 | 1261 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1262 | endef |
1da177e4 LT |
1263 | |
1264 | define filechk_version.h | |
ad774086 | 1265 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1266 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1267 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1268 | endef |
1269 | ||
43fee2b2 | 1270 | $(version_h): FORCE |
1da177e4 | 1271 | $(call filechk,version.h) |
223c24a7 | 1272 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1273 | |
273b281f | 1274 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1275 | $(call filechk,utsrelease.h) |
1276 | ||
179efcb4 VN |
1277 | PHONY += headerdep |
1278 | headerdep: | |
9663d989 PF |
1279 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1280 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1281 | |
8d730cfb DW |
1282 | # --------------------------------------------------------------------------- |
1283 | # Kernel headers | |
8d730cfb | 1284 | |
e6883b18 SR |
1285 | #Default location for installed headers |
1286 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1287 | |
59b2bd05 MY |
1288 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1289 | cmd_headers_install = \ | |
1290 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1291 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1292 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1293 | |
8d730cfb | 1294 | PHONY += headers_install |
59b2bd05 MY |
1295 | headers_install: headers |
1296 | $(call cmd,headers_install) | |
6520fe55 | 1297 | |
59b2bd05 | 1298 | PHONY += archheaders archscripts |
e6883b18 | 1299 | |
a5bae54c | 1300 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1301 | |
59b2bd05 MY |
1302 | PHONY += headers |
1303 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
9d022c54 | 1304 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1305 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
d5470d14 MY |
1306 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1307 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1308 | |
7ecaf069 | 1309 | # Deprecated. It is no-op now. |
68475359 | 1310 | PHONY += headers_check |
7ecaf069 MY |
1311 | headers_check: |
1312 | @: | |
68475359 | 1313 | |
e949f4c2 | 1314 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1315 | prepare: headers |
e949f4c2 | 1316 | endif |
68475359 | 1317 | |
bdd7714b MY |
1318 | PHONY += scripts_unifdef |
1319 | scripts_unifdef: scripts_basic | |
1320 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1321 | ||
5a5da78b SK |
1322 | # --------------------------------------------------------------------------- |
1323 | # Kernel selftest | |
1324 | ||
1325 | PHONY += kselftest | |
1326 | kselftest: | |
2bc84526 | 1327 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1328 | |
17eac6c2 SK |
1329 | kselftest-%: FORCE |
1330 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
dcb825a9 | 1331 | |
3d6dee7a BJZ |
1332 | PHONY += kselftest-merge |
1333 | kselftest-merge: | |
1334 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1335 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1336 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1337 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1338 | |
37c8a5fa RH |
1339 | # --------------------------------------------------------------------------- |
1340 | # Devicetree files | |
1341 | ||
1342 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1343 | dtstree := arch/$(SRCARCH)/boot/dts | |
1344 | endif | |
1345 | ||
1346 | ifneq ($(dtstree),) | |
1347 | ||
a5139fb3 | 1348 | %.dtb: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1349 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
1350 | ||
c473a8d0 | 1351 | PHONY += dtbs dtbs_install dtbs_check |
b5154bf6 | 1352 | dtbs: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1353 | $(Q)$(MAKE) $(build)=$(dtstree) |
1354 | ||
b5154bf6 | 1355 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
e10c4321 | 1356 | export CHECK_DTBS=y |
b5154bf6 MY |
1357 | dtbs: dt_binding_check |
1358 | endif | |
1359 | ||
b5154bf6 | 1360 | dtbs_check: dtbs |
4f0e3a57 | 1361 | |
37c8a5fa | 1362 | dtbs_install: |
2431f22a | 1363 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
37c8a5fa RH |
1364 | |
1365 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1366 | all: dtbs | |
1367 | endif | |
1368 | ||
1369 | endif | |
1370 | ||
1371 | PHONY += scripts_dtc | |
1372 | scripts_dtc: scripts_basic | |
1373 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1374 | ||
e10c4321 MY |
1375 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
1376 | export CHECK_DT_BINDING=y | |
1377 | endif | |
1378 | ||
c473a8d0 | 1379 | PHONY += dt_binding_check |
4f0e3a57 RH |
1380 | dt_binding_check: scripts_dtc |
1381 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1382 | ||
1da177e4 LT |
1383 | # --------------------------------------------------------------------------- |
1384 | # Modules | |
1385 | ||
1386 | ifdef CONFIG_MODULES | |
1387 | ||
070b98bf | 1388 | # By default, build modules as well |
1da177e4 | 1389 | |
73d1393e | 1390 | all: modules |
1da177e4 | 1391 | |
4b50c8c4 MY |
1392 | # When we're building modules with modversions, we need to consider |
1393 | # the built-in objects during the descend as well, in order to | |
1394 | # make sure the checksums are up to date before we record them. | |
1395 | ifdef CONFIG_MODVERSIONS | |
1396 | KBUILD_BUILTIN := 1 | |
1397 | endif | |
1398 | ||
3fbb43df | 1399 | # Build modules |
551559e1 | 1400 | # |
3fbb43df MY |
1401 | # A module can be listed more than once in obj-m resulting in |
1402 | # duplicate lines in modules.order files. Those are removed | |
1403 | # using awk while concatenating to the final file. | |
1da177e4 | 1404 | |
4f193362 | 1405 | PHONY += modules |
596b0474 | 1406 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare |
b805aa0e | 1407 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1408 | |
8451791d MY |
1409 | PHONY += modules_check |
1410 | modules_check: modules.order | |
1411 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1da177e4 | 1412 | |
b2c88554 MY |
1413 | cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ |
1414 | ||
1415 | modules.order: $(subdir-modorder) FORCE | |
1416 | $(call if_changed,modules_order) | |
1417 | ||
1418 | targets += modules.order | |
68980b47 | 1419 | |
1da177e4 | 1420 | # Target to prepare building external modules |
4f193362 | 1421 | PHONY += modules_prepare |
059bc9fc | 1422 | modules_prepare: prepare |
596b0474 | 1423 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds |
1da177e4 LT |
1424 | |
1425 | # Target to install modules | |
4f193362 | 1426 | PHONY += modules_install |
1da177e4 LT |
1427 | modules_install: _modinst_ _modinst_post |
1428 | ||
4f193362 | 1429 | PHONY += _modinst_ |
2c6d9636 | 1430 | _modinst_: |
1da177e4 LT |
1431 | @rm -rf $(MODLIB)/kernel |
1432 | @rm -f $(MODLIB)/source | |
1433 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1434 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1435 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1436 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1437 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1438 | fi |
1bd9a468 | 1439 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
2c6d9636 MY |
1440 | @cp -f modules.builtin $(MODLIB)/ |
1441 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
b805aa0e | 1442 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1443 | |
50a8ec31 | 1444 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1445 | # boot a modules.dep even before / is mounted read-write. However the |
1446 | # boot script depmod is the master version. | |
4f193362 | 1447 | PHONY += _modinst_post |
6d128e1e | 1448 | _modinst_post: _modinst_ |
50a8ec31 | 1449 | $(call cmd,depmod) |
1da177e4 | 1450 | |
d890f510 JB |
1451 | ifeq ($(CONFIG_MODULE_SIG), y) |
1452 | PHONY += modules_sign | |
1453 | modules_sign: | |
1454 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1455 | endif | |
1456 | ||
1da177e4 LT |
1457 | else # CONFIG_MODULES |
1458 | ||
1459 | # Modules not configured | |
1460 | # --------------------------------------------------------------------------- | |
1461 | ||
612e47ce MY |
1462 | PHONY += modules modules_install |
1463 | modules modules_install: | |
5369f550 MM |
1464 | @echo >&2 |
1465 | @echo >&2 "The present kernel configuration has modules disabled." | |
1466 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1467 | @echo >&2 "Then build a kernel with module support enabled." | |
1468 | @echo >&2 | |
1da177e4 LT |
1469 | @exit 1 |
1470 | ||
1471 | endif # CONFIG_MODULES | |
1472 | ||
1da177e4 LT |
1473 | ### |
1474 | # Cleaning is done on three levels. | |
1475 | # make clean Delete most generated files | |
1476 | # Leave enough to build external modules | |
1477 | # make mrproper Delete the current configuration, and all generated files | |
1478 | # make distclean Remove editor backup files, patch leftover files and the like | |
1479 | ||
1480 | # Directories & files removed with 'make clean' | |
269a535c | 1481 | CLEAN_FILES += include/ksym vmlinux.symvers \ |
3d32285f MY |
1482 | modules.builtin modules.builtin.modinfo modules.nsdeps \ |
1483 | compile_commands.json | |
1da177e4 LT |
1484 | |
1485 | # Directories & files removed with 'make mrproper' | |
0663c68c | 1486 | MRPROPER_FILES += include/config include/generated \ |
46a63d4b | 1487 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
0663c68c MY |
1488 | debian snap tar-install \ |
1489 | .config .config.old .version \ | |
46457133 | 1490 | Module.symvers \ |
fb117949 DW |
1491 | signing_key.pem signing_key.priv signing_key.x509 \ |
1492 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
46a63d4b MY |
1493 | signing_key.x509.signer vmlinux-gdb.py \ |
1494 | *.spec | |
1da177e4 | 1495 | |
46457133 | 1496 | # Directories & files removed with 'make distclean' |
46457133 MY |
1497 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS |
1498 | ||
1da177e4 LT |
1499 | # clean - Delete most, but leave enough to build external modules |
1500 | # | |
1da177e4 | 1501 | clean: rm-files := $(CLEAN_FILES) |
1da177e4 | 1502 | |
76cd306d | 1503 | PHONY += archclean vmlinuxclean |
1da177e4 | 1504 | |
bd1ee804 PM |
1505 | vmlinuxclean: |
1506 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1507 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1508 | |
1509 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1510 | |
1511 | # mrproper - Delete all generated files, including .config | |
1512 | # | |
1da177e4 | 1513 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
cb43fb57 | 1514 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1515 | |
b421b8a6 | 1516 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1517 | $(mrproper-dirs): |
1518 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1519 | ||
b421b8a6 | 1520 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1521 | $(call cmd,rmfiles) |
1522 | ||
1523 | # distclean | |
1524 | # | |
46457133 MY |
1525 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) |
1526 | ||
4f193362 | 1527 | PHONY += distclean |
1da177e4 LT |
1528 | |
1529 | distclean: mrproper | |
46457133 | 1530 | $(call cmd,rmfiles) |
1da177e4 | 1531 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
070b98bf | 1532 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1533 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1534 | -o -name 'core' \) \ | |
1da177e4 LT |
1535 | -type f -print | xargs rm -f |
1536 | ||
1537 | ||
1538 | # Packaging of the kernel to various formats | |
1539 | # --------------------------------------------------------------------------- | |
1da177e4 | 1540 | |
bafb6747 | 1541 | %src-pkg: FORCE |
000ec95f | 1542 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1543 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1544 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1545 | |
1546 | # Brief documentation of the typical targets used | |
1547 | # --------------------------------------------------------------------------- | |
1548 | ||
5dffbe81 | 1549 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1550 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1551 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1552 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1553 | |
fe69b420 | 1554 | PHONY += help |
1da177e4 LT |
1555 | help: |
1556 | @echo 'Cleaning targets:' | |
5ea084ef | 1557 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1558 | @echo ' enough build support to build external modules' |
5ea084ef | 1559 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1560 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1561 | @echo '' |
1562 | @echo 'Configuration targets:' | |
1563 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1564 | @echo '' | |
1565 | @echo 'Other generic targets:' | |
1566 | @echo ' all - Build all targets marked with [*]' | |
1567 | @echo '* vmlinux - Build the bare kernel' | |
1568 | @echo '* modules - Build all modules' | |
9cc5d74c | 1569 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1570 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1571 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1572 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1573 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1574 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1575 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1576 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1577 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1578 | @echo ' tags/TAGS - Generate tags file for editors' |
1579 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1580 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1581 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1582 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1583 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1584 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1585 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1586 | echo '' |
31b8cc80 | 1587 | @echo 'Static analysers:' |
1da177e4 | 1588 | @echo ' checkstack - Generate a list of stack hogs' |
aa025e7d | 1589 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1590 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1591 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1592 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1593 | @echo ' coccicheck - Check with Coccinelle' |
6ad7cbc0 NH |
1594 | @echo ' clang-analyzer - Check with clang static analyzer' |
1595 | @echo ' clang-tidy - Check with clang-tidy' | |
74425eee | 1596 | @echo '' |
eb8305ae MM |
1597 | @echo 'Tools:' |
1598 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1599 | @echo '' | |
31b8cc80 | 1600 | @echo 'Kernel selftest:' |
e51d8dac SK |
1601 | @echo ' kselftest - Build and run kernel selftest' |
1602 | @echo ' Build, install, and boot kernel before' | |
1603 | @echo ' running kselftest on it' | |
1604 | @echo ' Run as root for full coverage' | |
1605 | @echo ' kselftest-all - Build kernel selftest' | |
1606 | @echo ' kselftest-install - Build and install kernel selftest' | |
1607 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1608 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1609 | @echo ' kselftest to existing .config.' | |
5a5da78b | 1610 | @echo '' |
37c8a5fa RH |
1611 | @$(if $(dtstree), \ |
1612 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1613 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1614 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1615 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1616 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1617 | echo '') |
1618 | ||
31b8cc80 RD |
1619 | @echo 'Userspace tools targets:' |
1620 | @echo ' use "make tools/help"' | |
1621 | @echo ' or "cd tools; make help"' | |
1622 | @echo '' | |
1da177e4 | 1623 | @echo 'Kernel packaging:' |
000ec95f | 1624 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1625 | @echo '' |
1626 | @echo 'Documentation targets:' | |
cb43fb57 | 1627 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1628 | @echo '' |
01dee188 | 1629 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1630 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1631 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1632 | @echo '' |
1633 | @$(if $(boards), \ | |
1634 | $(foreach b, $(boards), \ | |
4234448b | 1635 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
1da177e4 | 1636 | echo '') |
5dffbe81 SB |
1637 | @$(if $(board-dirs), \ |
1638 | $(foreach b, $(board-dirs), \ | |
1639 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1640 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1641 | echo '') | |
1da177e4 LT |
1642 | |
1643 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1644 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1645 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
a64c0440 GU |
1646 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
1647 | @echo ' (sparse by default)' | |
701842e3 | 1648 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1649 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1650 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1651 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1652 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1653 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1654 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1655 | @echo '' |
1656 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1657 | @echo 'For further info see the ./README file' | |
1658 | ||
1659 | ||
5dffbe81 SB |
1660 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1661 | ||
1662 | help-boards: $(help-board-dirs) | |
1663 | ||
fbae4d58 | 1664 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1665 | |
1666 | $(help-board-dirs): help-%: | |
1667 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1668 | @$(if $(boards-per-dir), \ | |
1669 | $(foreach b, $(boards-per-dir), \ | |
1670 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1671 | echo '') | |
1672 | ||
1673 | ||
1da177e4 LT |
1674 | # Documentation targets |
1675 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1676 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1677 | linkcheckdocs dochelp refcheckdocs | |
22cba31b | 1678 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1679 | $(DOC_TARGETS): |
cb43fb57 | 1680 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1681 | |
67274c08 MY |
1682 | # Misc |
1683 | # --------------------------------------------------------------------------- | |
1684 | ||
1685 | PHONY += scripts_gdb | |
7a739ce5 | 1686 | scripts_gdb: prepare0 |
1e5ff84f | 1687 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1688 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1689 | |
1690 | ifdef CONFIG_GDB_SCRIPTS | |
1691 | all: scripts_gdb | |
1692 | endif | |
1693 | ||
1da177e4 LT |
1694 | else # KBUILD_EXTMOD |
1695 | ||
1696 | ### | |
1697 | # External module support. | |
1698 | # When building external modules the kernel used as basis is considered | |
1699 | # read-only, and no consistency checks are made and the make | |
1700 | # system is not used on the basis kernel. If updates are required | |
1701 | # in the basis kernel ordinary make commands (without M=...) must | |
1702 | # be used. | |
1703 | # | |
1704 | # The following are the only valid targets when building external | |
1705 | # modules. | |
1706 | # make M=dir clean Delete all automatically generated files | |
1707 | # make M=dir modules Make all modules in specified dir | |
1708 | # make M=dir Same as 'make M=dir modules' | |
1709 | # make M=dir modules_install | |
070b98bf | 1710 | # Install the modules built in the module directory |
1da177e4 LT |
1711 | # Assumes install directory is already created |
1712 | ||
6212804f MY |
1713 | # We are always building only modules. |
1714 | KBUILD_BUILTIN := | |
1da177e4 | 1715 | KBUILD_MODULES := 1 |
1da177e4 | 1716 | |
c99f3918 MY |
1717 | build-dirs := $(KBUILD_EXTMOD) |
1718 | PHONY += modules | |
3d32285f | 1719 | modules: $(MODORDER) |
b805aa0e | 1720 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1721 | |
3d32285f MY |
1722 | $(MODORDER): descend |
1723 | @: | |
1724 | ||
4f193362 | 1725 | PHONY += modules_install |
a67dc21a | 1726 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1727 | |
4f193362 PS |
1728 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1729 | PHONY += _emodinst_ | |
a67dc21a | 1730 | _emodinst_: |
a67dc21a | 1731 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1732 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1733 | |
4f193362 | 1734 | PHONY += _emodinst_post |
a67dc21a SR |
1735 | _emodinst_post: _emodinst_ |
1736 | $(call cmd,depmod) | |
1737 | ||
3d32285f MY |
1738 | compile_commands.json: $(extmod-prefix)compile_commands.json |
1739 | PHONY += compile_commands.json | |
1740 | ||
76cd306d | 1741 | clean-dirs := $(KBUILD_EXTMOD) |
3d32285f MY |
1742 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ |
1743 | $(KBUILD_EXTMOD)/compile_commands.json | |
1da177e4 | 1744 | |
fe69b420 | 1745 | PHONY += help |
1da177e4 LT |
1746 | help: |
1747 | @echo ' Building external modules.' | |
1748 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1749 | @echo '' | |
1750 | @echo ' modules - default target, build the module(s)' | |
1751 | @echo ' modules_install - install the module' | |
1752 | @echo ' clean - remove generated files in module directory only' | |
1753 | @echo '' | |
06300b21 | 1754 | |
596b0474 MY |
1755 | # no-op for external module builds |
1756 | PHONY += prepare modules_prepare | |
1757 | ||
1da177e4 LT |
1758 | endif # KBUILD_EXTMOD |
1759 | ||
b1fbfcb4 MY |
1760 | # Single targets |
1761 | # --------------------------------------------------------------------------- | |
1762 | # To build individual files in subdirectories, you can do like this: | |
1763 | # | |
1764 | # make foo/bar/baz.s | |
1765 | # | |
1766 | # The supported suffixes for single-target are listed in 'single-targets' | |
1767 | # | |
1768 | # To build only under specific subdirectories, you can do like this: | |
1769 | # | |
1770 | # make foo/bar/baz/ | |
1771 | ||
1772 | ifdef single-build | |
1773 | ||
1774 | # .ko is special because modpost is needed | |
1775 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1776 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) | |
1777 | ||
1778 | $(single-ko): single_modpost | |
1779 | @: | |
1780 | $(single-no-ko): descend | |
1781 | @: | |
1782 | ||
1783 | ifeq ($(KBUILD_EXTMOD),) | |
1784 | # For the single build of in-tree modules, use a temporary file to avoid | |
1785 | # the situation of modules_install installing an invalid modules.order. | |
1786 | MODORDER := .modules.tmp | |
1787 | endif | |
1788 | ||
1789 | PHONY += single_modpost | |
596b0474 | 1790 | single_modpost: $(single-no-ko) modules_prepare |
b1fbfcb4 MY |
1791 | $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) |
1792 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1793 | ||
1794 | KBUILD_MODULES := 1 | |
1795 | ||
1796 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) | |
1797 | ||
1798 | # trim unrelated directories | |
1799 | build-dirs := $(foreach d, $(build-dirs), \ | |
1800 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
1801 | ||
1802 | endif | |
1803 | ||
b480fec9 MY |
1804 | ifndef CONFIG_MODULES |
1805 | KBUILD_MODULES := | |
1806 | endif | |
1807 | ||
c99f3918 MY |
1808 | # Handle descending into subdirectories listed in $(build-dirs) |
1809 | # Preset locale variables to speed up the build process. Limit locale | |
1810 | # tweaks to this spot to avoid wrong language settings when running | |
1811 | # make menuconfig etc. | |
1812 | # Error messages still appears in the original language | |
1813 | PHONY += descend $(build-dirs) | |
1814 | descend: $(build-dirs) | |
1815 | $(build-dirs): prepare | |
b1fbfcb4 | 1816 | $(Q)$(MAKE) $(build)=$@ \ |
20b1be59 | 1817 | single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ |
b1fbfcb4 | 1818 | need-builtin=1 need-modorder=1 |
c99f3918 | 1819 | |
76cd306d MY |
1820 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
1821 | PHONY += $(clean-dirs) clean | |
1822 | $(clean-dirs): | |
1823 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1824 | ||
88d7be03 | 1825 | clean: $(clean-dirs) |
88d7be03 | 1826 | $(call cmd,rmfiles) |
43f67c98 | 1827 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1828 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1829 | -o -name '*.ko.*' \ |
1830 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1831 | -o -name '*.dwo' -o -name '*.lst' \ |
bbc55bde | 1832 | -o -name '*.su' -o -name '*.mod' \ |
88d7be03 | 1833 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1834 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1835 | -o -name '*.asn1.[ch]' \ |
88d7be03 | 1836 | -o -name '*.symtypes' -o -name 'modules.order' \ |
8b41fc44 | 1837 | -o -name '.tmp_*.o.*' \ |
6b90bd4b | 1838 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1839 | -o -name '*.ll' \ |
88d7be03 MM |
1840 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1841 | ||
1da177e4 LT |
1842 | # Generate tags for editors |
1843 | # --------------------------------------------------------------------------- | |
a680eedc | 1844 | quiet_cmd_tags = GEN $@ |
858805b3 | 1845 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 1846 | |
f4ed1009 | 1847 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1848 | $(call cmd,tags) |
1849 | ||
eb8305ae MM |
1850 | # Script to generate missing namespace dependencies |
1851 | # --------------------------------------------------------------------------- | |
1852 | ||
1853 | PHONY += nsdeps | |
bff9c62b | 1854 | nsdeps: export KBUILD_NSDEPS=1 |
eb8305ae | 1855 | nsdeps: modules |
bff9c62b | 1856 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
eb8305ae | 1857 | |
3d32285f MY |
1858 | # Clang Tooling |
1859 | # --------------------------------------------------------------------------- | |
1860 | ||
1861 | quiet_cmd_gen_compile_commands = GEN $@ | |
1862 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
1863 | ||
6ad7cbc0 | 1864 | $(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ |
3d32285f MY |
1865 | $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ |
1866 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE | |
1867 | $(call if_changed,gen_compile_commands) | |
1868 | ||
1869 | targets += $(extmod-prefix)compile_commands.json | |
1870 | ||
6ad7cbc0 NH |
1871 | PHONY += clang-tidy clang-analyzer |
1872 | ||
1873 | ifdef CONFIG_CC_IS_CLANG | |
1874 | quiet_cmd_clang_tools = CHECK $< | |
1875 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
1876 | ||
1877 | clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json | |
1878 | $(call cmd,clang_tools) | |
1879 | else | |
1880 | clang-tidy clang-analyzer: | |
1881 | @echo "$@ requires CC=clang" >&2 | |
1882 | @false | |
1883 | endif | |
1884 | ||
1da177e4 LT |
1885 | # Scripts to check various things for consistency |
1886 | # --------------------------------------------------------------------------- | |
1887 | ||
7dfbea4c | 1888 | PHONY += includecheck versioncheck coccicheck export_report |
279f3dd3 | 1889 | |
1da177e4 | 1890 | includecheck: |
436f876c | 1891 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1892 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1893 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1894 | |
1895 | versioncheck: | |
2ee2d292 | 1896 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1897 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1898 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1899 | |
74425eee | 1900 | coccicheck: |
858805b3 | 1901 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 1902 | |
295ac051 AB |
1903 | export_report: |
1904 | $(PERL) $(srctree)/scripts/export_report.pl | |
1905 | ||
c398ff00 | 1906 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1907 | |
011e3a9a JD |
1908 | # UML needs a little special treatment here. It wants to use the host |
1909 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1910 | # else wants $(ARCH), including people doing cross-builds, which means | |
1911 | # that $(SUBARCH) doesn't work here. | |
1912 | ifeq ($(ARCH), um) | |
1913 | CHECKSTACK_ARCH := $(SUBARCH) | |
1914 | else | |
1915 | CHECKSTACK_ARCH := $(ARCH) | |
1916 | endif | |
1da177e4 LT |
1917 | checkstack: |
1918 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 1919 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1920 | |
7b8ea53d AW |
1921 | kernelrelease: |
1922 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1923 | |
cb58455c | 1924 | kernelversion: |
2244cbd8 | 1925 | @echo $(KERNELVERSION) |
1da177e4 | 1926 | |
c398ff00 MM |
1927 | image_name: |
1928 | @echo $(KBUILD_IMAGE) | |
1929 | ||
ea01fa9f | 1930 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1931 | |
1932 | ifeq ($(quiet),silent_) | |
1933 | tools_silent=s | |
1934 | endif | |
1935 | ||
ea01fa9f | 1936 | tools/: FORCE |
bf35182f | 1937 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1938 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
ea01fa9f BP |
1939 | |
1940 | tools/%: FORCE | |
bf35182f | 1941 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1942 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
ea01fa9f | 1943 | |
1da177e4 | 1944 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
0663c68c | 1945 | cmd_rmfiles = rm -rf $(rm-files) |
1da177e4 | 1946 | |
bc3c26fe | 1947 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1948 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1949 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1950 | $(KERNELRELEASE) |
50a8ec31 | 1951 | |
392885ee MY |
1952 | # read saved command lines for existing targets |
1953 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1954 | |
b999923c | 1955 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 1956 | |
46b7c492 | 1957 | endif # config-build |
2042b548 MY |
1958 | endif # mixed-build |
1959 | endif # need-sub-make | |
1da177e4 | 1960 | |
4f193362 | 1961 | PHONY += FORCE |
1da177e4 | 1962 | FORCE: |
4f193362 | 1963 | |
bd412d81 | 1964 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1965 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1966 | .PHONY: $(PHONY) |