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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 | 2 | VERSION = 5 |
bb6d3fb3 | 3 | PATCHLEVEL = 6 |
55922c9d | 4 | SUBLEVEL = 0 |
98d54f81 | 5 | EXTRAVERSION = -rc4 |
d6d5df1d | 6 | NAME = Kleptomaniac Octopus |
1da177e4 LT |
7 | |
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
ba634ece MY |
14 | # That's our default target when none is given on the command line |
15 | PHONY := _all | |
16 | _all: | |
17 | ||
1da177e4 LT |
18 | # We are using a recursive build, so we need to do a little thinking |
19 | # to get the ordering right. | |
20 | # | |
21 | # Most importantly: sub-Makefiles should only ever modify files in | |
22 | # their own directory. If in some directory we have a dependency on | |
23 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 24 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
25 | # turn into vmlinux), we will call a sub make in that other dir, and |
26 | # after that we are sure that everything which is in that other dir | |
27 | # is now up to date. | |
28 | # | |
29 | # The only cases where we need to modify files which have global | |
30 | # effects are thus separated out and done before the recursive | |
31 | # descending is started. They are now explicitly listed as the | |
32 | # prepare rule. | |
33 | ||
221cc2d2 | 34 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
35 | |
36 | # Do not use make's built-in rules and variables | |
37 | # (this increases performance and avoids hard-to-debug behaviour) | |
38 | MAKEFLAGS += -rR | |
39 | ||
40 | # Avoid funny character set dependencies | |
41 | unexport LC_ALL | |
42 | LC_COLLATE=C | |
43 | LC_NUMERIC=C | |
44 | export LC_COLLATE LC_NUMERIC | |
45 | ||
46 | # Avoid interference with shell env settings | |
47 | unexport GREP_OPTIONS | |
48 | ||
066b7ed9 MM |
49 | # Beautify output |
50 | # --------------------------------------------------------------------------- | |
51 | # | |
52 | # Normally, we echo the whole command before executing it. By making | |
53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
54 | # $(quiet) to choose other forms of output instead, e.g. | |
55 | # | |
56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
58 | # | |
59 | # If $(quiet) is empty, the whole command will be printed. | |
60 | # If it is set to "quiet_", only the short version will be printed. | |
61 | # If it is set to "silent_", nothing will be printed at all, since | |
62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
63 | # | |
64 | # A simple variant is to prefix commands with $(Q) - that's useful | |
65 | # for commands that shall be hidden in non-verbose mode. | |
66 | # | |
67 | # $(Q)ln $@ :< | |
68 | # | |
69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
505b12b3 | 71 | # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. |
066b7ed9 | 72 | # |
1da177e4 LT |
73 | # To put more focus on warnings, be less verbose as default |
74 | # Use 'make V=1' to see the full commands | |
75 | ||
b8b0618c CR |
76 | ifeq ("$(origin V)", "command line") |
77 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
78 | endif |
79 | ifndef KBUILD_VERBOSE | |
80 | KBUILD_VERBOSE = 0 | |
81 | endif | |
82 | ||
066b7ed9 MM |
83 | ifeq ($(KBUILD_VERBOSE),1) |
84 | quiet = | |
85 | Q = | |
86 | else | |
87 | quiet=quiet_ | |
88 | Q = @ | |
89 | endif | |
90 | ||
91 | # If the user is running make -s (silent mode), suppress echoing of | |
92 | # commands | |
93 | ||
6f0fa58e | 94 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 MM |
95 | quiet=silent_ |
96 | endif | |
066b7ed9 MM |
97 | |
98 | export quiet Q KBUILD_VERBOSE | |
99 | ||
25b146c5 MY |
100 | # Kbuild will save output files in the current working directory. |
101 | # This does not need to match to the root of the kernel source tree. | |
102 | # | |
103 | # For example, you can do this: | |
104 | # | |
105 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
106 | # | |
107 | # If you want to save output files in a different location, there are | |
108 | # two syntaxes to specify it. | |
109 | # | |
1da177e4 LT |
110 | # 1) O= |
111 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 112 | # |
1da177e4 | 113 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
114 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
115 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
116 | # |
117 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
118 | # variable. | |
119 | ||
25b146c5 | 120 | # Do we want to change the working directory? |
b8b0618c CR |
121 | ifeq ("$(origin O)", "command line") |
122 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
123 | endif |
124 | ||
25b146c5 MY |
125 | ifneq ($(KBUILD_OUTPUT),) |
126 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
127 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
128 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
129 | $(if $(abs_objtree),, \ | |
130 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
131 | ||
132 | # $(realpath ...) resolves symlinks | |
133 | abs_objtree := $(realpath $(abs_objtree)) | |
134 | else | |
135 | abs_objtree := $(CURDIR) | |
136 | endif # ifneq ($(KBUILD_OUTPUT),) | |
137 | ||
138 | ifeq ($(abs_objtree),$(CURDIR)) | |
139 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
140 | MAKEFLAGS += --no-print-directory | |
141 | else | |
142 | need-sub-make := 1 | |
51193b76 RJ |
143 | endif |
144 | ||
25b146c5 | 145 | abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) |
1da177e4 | 146 | |
25b146c5 MY |
147 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
148 | $(error source directory cannot contain spaces or colons) | |
149 | endif | |
1da177e4 | 150 | |
25b146c5 | 151 | ifneq ($(abs_srctree),$(abs_objtree)) |
80463f1b MY |
152 | # Look for make include files relative to root of kernel src |
153 | # | |
154 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
25b146c5 MY |
155 | # once after the Makefile is read. We need to invoke sub-make. |
156 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
688931a5 | 157 | need-sub-make := 1 |
25b146c5 | 158 | endif |
3812b8c5 | 159 | |
688931a5 MY |
160 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
161 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
162 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
163 | need-sub-make := 1 | |
164 | # Cancel implicit rules for this Makefile. | |
165 | $(lastword $(MAKEFILE_LIST)): ; | |
166 | endif | |
167 | ||
25b146c5 | 168 | export abs_srctree abs_objtree |
221cc2d2 MY |
169 | export sub_make_done := 1 |
170 | ||
688931a5 MY |
171 | ifeq ($(need-sub-make),1) |
172 | ||
0b35786d MM |
173 | PHONY += $(MAKECMDGOALS) sub-make |
174 | ||
0209987f | 175 | $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 176 | @: |
0b35786d | 177 | |
c4e6fff1 | 178 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 179 | sub-make: |
25b146c5 | 180 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 181 | |
688931a5 | 182 | endif # need-sub-make |
221cc2d2 | 183 | endif # sub_make_done |
688931a5 | 184 | |
1da177e4 | 185 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 186 | ifeq ($(need-sub-make),) |
1da177e4 | 187 | |
7ff52571 MY |
188 | # Do not print "Entering directory ...", |
189 | # but we want to display it when entering to the output directory | |
190 | # so that IDEs/editors are able to understand relative filenames. | |
191 | MAKEFLAGS += --no-print-directory | |
192 | ||
aa55c8e2 MY |
193 | # Call a source code checker (by default, "sparse") as part of the |
194 | # C compilation. | |
195 | # | |
196 | # Use 'make C=1' to enable checking of only re-compiled files. | |
197 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
198 | # of whether they are re-compiled or not. | |
199 | # | |
036db11c C |
200 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
201 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
202 | |
203 | ifeq ("$(origin C)", "command line") | |
204 | KBUILD_CHECKSRC = $(C) | |
205 | endif | |
206 | ifndef KBUILD_CHECKSRC | |
207 | KBUILD_CHECKSRC = 0 | |
208 | endif | |
209 | ||
7e35b425 MY |
210 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
211 | # directory of external module to build. Setting M= takes precedence. | |
aa55c8e2 MY |
212 | ifeq ("$(origin M)", "command line") |
213 | KBUILD_EXTMOD := $(M) | |
214 | endif | |
215 | ||
051f278e MY |
216 | export KBUILD_CHECKSRC KBUILD_EXTMOD |
217 | ||
394053f4 MY |
218 | extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
219 | ||
25b146c5 | 220 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
221 | # building in the source tree |
222 | srctree := . | |
051f278e | 223 | building_out_of_srctree := |
9da0763b | 224 | else |
25b146c5 | 225 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
226 | # building in a subdirectory of the source tree |
227 | srctree := .. | |
228 | else | |
25b146c5 | 229 | srctree := $(abs_srctree) |
9da0763b | 230 | endif |
051f278e | 231 | building_out_of_srctree := 1 |
9da0763b | 232 | endif |
2c1f4f12 | 233 | |
95fd3f87 MY |
234 | ifneq ($(KBUILD_ABS_SRCTREE),) |
235 | srctree := $(abs_srctree) | |
236 | endif | |
2c1f4f12 | 237 | |
7e1c0477 | 238 | objtree := . |
6b12de69 | 239 | VPATH := $(srctree) |
1da177e4 | 240 | |
051f278e | 241 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 242 | |
2c1f4f12 MY |
243 | # To make sure we do not include .config for any of the *config targets |
244 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
245 | # It is allowed to specify more targets when calling make, including | |
246 | # mixing *config targets and build targets. | |
247 | # For example 'make oldconfig all'. | |
248 | # Detect when mixed targets is specified, and make a second invocation | |
249 | # of make so .config is not included in this case either (for *config). | |
250 | ||
251 | version_h := include/generated/uapi/linux/version.h | |
252 | old_version_h := include/linux/version.h | |
253 | ||
22340a06 MY |
254 | clean-targets := %clean mrproper cleandocs |
255 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 256 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 257 | $(version_h) headers headers_% archheaders archscripts \ |
63e31a67 | 258 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
259 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
260 | kernelrelease | |
394053f4 | 261 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
2c1f4f12 | 262 | |
2042b548 MY |
263 | config-build := |
264 | mixed-build := | |
265 | need-config := 1 | |
266 | may-sync-config := 1 | |
394053f4 | 267 | single-build := |
2c1f4f12 MY |
268 | |
269 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
270 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 271 | need-config := |
2c1f4f12 MY |
272 | endif |
273 | endif | |
274 | ||
d7942413 MY |
275 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
276 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 277 | may-sync-config := |
d7942413 MY |
278 | endif |
279 | endif | |
280 | ||
281 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 282 | may-sync-config := |
d7942413 MY |
283 | endif |
284 | ||
2c1f4f12 MY |
285 | ifeq ($(KBUILD_EXTMOD),) |
286 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
2042b548 | 287 | config-build := 1 |
2c1f4f12 | 288 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 289 | mixed-build := 1 |
2c1f4f12 MY |
290 | endif |
291 | endif | |
292 | endif | |
22340a06 | 293 | |
394053f4 MY |
294 | # We cannot build single targets and the others at the same time |
295 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
296 | single-build := 1 | |
297 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
298 | mixed-build := 1 | |
299 | endif | |
300 | endif | |
301 | ||
22340a06 MY |
302 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
303 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
304 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 305 | mixed-build := 1 |
22340a06 MY |
306 | endif |
307 | endif | |
308 | ||
2c1f4f12 MY |
309 | # install and modules_install need also be processed one by one |
310 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
311 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 312 | mixed-build := 1 |
2c1f4f12 MY |
313 | endif |
314 | endif | |
315 | ||
2042b548 | 316 | ifdef mixed-build |
2c1f4f12 MY |
317 | # =========================================================================== |
318 | # We're called with mixed targets (*config and build targets). | |
319 | # Handle them one by one. | |
320 | ||
321 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
322 | ||
323 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
324 | @: | |
325 | ||
326 | __build_one_by_one: | |
327 | $(Q)set -e; \ | |
328 | for i in $(MAKECMDGOALS); do \ | |
329 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
330 | done | |
331 | ||
2042b548 | 332 | else # !mixed-build |
2c1f4f12 | 333 | |
2c1f4f12 MY |
334 | include scripts/Kbuild.include |
335 | ||
336 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
337 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
338 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
339 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
340 | ||
b2d35fa5 | 341 | include scripts/subarch.include |
1da177e4 LT |
342 | |
343 | # Cross compiling and selecting different set of gcc/bin-utils | |
344 | # --------------------------------------------------------------------------- | |
345 | # | |
346 | # When performing cross compilation for other architectures ARCH shall be set | |
347 | # to the target architecture. (See arch/* for the possibilities). | |
348 | # ARCH can be set during invocation of make: | |
349 | # make ARCH=ia64 | |
350 | # Another way is to have ARCH set in the environment. | |
351 | # The default ARCH is the host where make is executed. | |
352 | ||
353 | # CROSS_COMPILE specify the prefix used for all executables used | |
354 | # during compilation. Only gcc and related bin-utils executables | |
355 | # are prefixed with $(CROSS_COMPILE). | |
356 | # CROSS_COMPILE can be set on the command line | |
357 | # make CROSS_COMPILE=ia64-linux- | |
358 | # Alternatively CROSS_COMPILE can be set in the environment. | |
359 | # Default value for CROSS_COMPILE is not to prefix executables | |
360 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 361 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
362 | |
363 | # Architecture as present in compile.h | |
6752ed90 TG |
364 | UTS_MACHINE := $(ARCH) |
365 | SRCARCH := $(ARCH) | |
1da177e4 | 366 | |
d746d647 SR |
367 | # Additional ARCH settings for x86 |
368 | ifeq ($(ARCH),i386) | |
369 | SRCARCH := x86 | |
370 | endif | |
371 | ifeq ($(ARCH),x86_64) | |
372 | SRCARCH := x86 | |
373 | endif | |
74b469f2 | 374 | |
5e538790 | 375 | # Additional ARCH settings for sparc |
e69f58c0 NK |
376 | ifeq ($(ARCH),sparc32) |
377 | SRCARCH := sparc | |
378 | endif | |
a439fe51 | 379 | ifeq ($(ARCH),sparc64) |
5e538790 | 380 | SRCARCH := sparc |
a439fe51 | 381 | endif |
2fb9b1bd | 382 | |
3cc000b5 PM |
383 | # Additional ARCH settings for sh |
384 | ifeq ($(ARCH),sh64) | |
385 | SRCARCH := sh | |
386 | endif | |
387 | ||
14cdd3c4 | 388 | KCONFIG_CONFIG ?= .config |
41263fc6 | 389 | export KCONFIG_CONFIG |
14cdd3c4 | 390 | |
2a86f661 MY |
391 | # Default file for 'make defconfig'. This may be overridden by arch-Makefile. |
392 | export KBUILD_DEFCONFIG := defconfig | |
393 | ||
1da177e4 | 394 | # SHELL used by kbuild |
858805b3 | 395 | CONFIG_SHELL := sh |
1da177e4 | 396 | |
6d79a7b4 MY |
397 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
398 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
399 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 400 | |
070b98bf SR |
401 | HOSTCC = gcc |
402 | HOSTCXX = g++ | |
96f14fe7 | 403 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
404 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
405 | $(HOSTCFLAGS) | |
406 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
407 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
408 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 409 | |
1da177e4 | 410 | # Make variables (CC, etc...) |
1da177e4 LT |
411 | AS = $(CROSS_COMPILE)as |
412 | LD = $(CROSS_COMPILE)ld | |
413 | CC = $(CROSS_COMPILE)gcc | |
414 | CPP = $(CC) -E | |
415 | AR = $(CROSS_COMPILE)ar | |
416 | NM = $(CROSS_COMPILE)nm | |
417 | STRIP = $(CROSS_COMPILE)strip | |
418 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
419 | OBJDUMP = $(CROSS_COMPILE)objdump | |
7bac9870 | 420 | OBJSIZE = $(CROSS_COMPILE)size |
eefb8c12 | 421 | READELF = $(CROSS_COMPILE)readelf |
e83b9f55 | 422 | PAHOLE = pahole |
73a4f6db MY |
423 | LEX = flex |
424 | YACC = bison | |
1da177e4 | 425 | AWK = awk |
caa27b66 | 426 | INSTALLKERNEL := installkernel |
1da177e4 | 427 | DEPMOD = /sbin/depmod |
1da177e4 | 428 | PERL = perl |
011bf125 | 429 | PYTHON = python |
e9781b52 | 430 | PYTHON3 = python3 |
1da177e4 | 431 | CHECK = sparse |
858805b3 | 432 | BASH = bash |
1da177e4 | 433 | |
80a7d1d9 | 434 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 435 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
0c22be07 | 436 | NOSTDINC_FLAGS := |
6588169d SR |
437 | CFLAGS_MODULE = |
438 | AFLAGS_MODULE = | |
439 | LDFLAGS_MODULE = | |
1da177e4 LT |
440 | CFLAGS_KERNEL = |
441 | AFLAGS_KERNEL = | |
b36fad65 | 442 | LDFLAGS_vmlinux = |
1da177e4 | 443 | |
abbf1590 DH |
444 | # Use USERINCLUDE when you must reference the UAPI directories only. |
445 | USERINCLUDE := \ | |
9d022c54 MY |
446 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
447 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 448 | -I$(srctree)/include/uapi \ |
3308b285 | 449 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
450 | -include $(srctree)/include/linux/kconfig.h |
451 | ||
1da177e4 LT |
452 | # Use LINUXINCLUDE when you must reference the include/ directory. |
453 | # Needed to be compatible with the O= option | |
abbf1590 | 454 | LINUXINCLUDE := \ |
9d022c54 MY |
455 | -I$(srctree)/arch/$(SRCARCH)/include \ |
456 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
051f278e | 457 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
f8224f7f MY |
458 | -I$(objtree)/include \ |
459 | $(USERINCLUDE) | |
1da177e4 | 460 | |
42a92bcc | 461 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 462 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 463 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 464 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
51b97e35 | 465 | -Wno-format-security \ |
433dc2eb MY |
466 | -std=gnu89 |
467 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
468 | KBUILD_AFLAGS_KERNEL := |
469 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
470 | KBUILD_AFLAGS_MODULE := -DMODULE |
471 | KBUILD_CFLAGS_MODULE := -DMODULE | |
10df0638 MY |
472 | KBUILD_LDFLAGS_MODULE := |
473 | export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds | |
d503ac53 | 474 | KBUILD_LDFLAGS := |
433dc2eb | 475 | GCC_PLUGINS_CFLAGS := |
5241ab4c | 476 | CLANG_FLAGS := |
1da177e4 | 477 | |
858805b3 | 478 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
eefb8c12 | 479 | export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL |
94f7345b | 480 | export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
7bac9870 | 481 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
1da177e4 | 482 | |
d503ac53 | 483 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
484 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
485 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 486 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 487 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 488 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
1da177e4 | 489 | |
1da177e4 LT |
490 | # Files to ignore in find ... statements |
491 | ||
ae63b2d7 PB |
492 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
493 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
494 | -prune -o | |
450c6076 JJ |
495 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
496 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
497 | |
498 | # =========================================================================== | |
499 | # Rules shared between *config targets and build targets | |
500 | ||
312a3d09 | 501 | # Basic helpers built in scripts/basic/ |
4f193362 | 502 | PHONY += scripts_basic |
1da177e4 LT |
503 | scripts_basic: |
504 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 505 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 506 | |
4f193362 | 507 | PHONY += outputmakefile |
e8e83a23 | 508 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
509 | # outputmakefile generates a Makefile in the output directory, if using a |
510 | # separate output directory. This allows convenient use of make in the | |
511 | # output directory. | |
3a51ff34 VK |
512 | # At the same time when output Makefile generated, generate .gitignore to |
513 | # ignore whole output directory | |
1da177e4 | 514 | outputmakefile: |
051f278e | 515 | ifdef building_out_of_srctree |
e8e83a23 MY |
516 | $(Q)if [ -f $(srctree)/.config -o \ |
517 | -d $(srctree)/include/config -o \ | |
518 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
519 | echo >&2 "***"; \ | |
520 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
521 | echo >&2 "*** in $(abs_srctree)";\ | |
522 | echo >&2 "***"; \ | |
523 | false; \ | |
524 | fi | |
92979997 | 525 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 526 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
156e7cbb MY |
527 | $(Q)test -e .gitignore || \ |
528 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 529 | endif |
1da177e4 | 530 | |
99516742 | 531 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 532 | ifneq ($(CROSS_COMPILE),) |
5241ab4c | 533 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 534 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
238bcbc4 | 535 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
ef8c4ed9 | 536 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
537 | endif |
538 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 539 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 540 | endif |
876a0600 | 541 | ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) |
238bcbc4 | 542 | CLANG_FLAGS += -no-integrated-as |
876a0600 | 543 | endif |
589834b3 | 544 | CLANG_FLAGS += -Werror=unknown-warning-option |
238bcbc4 MY |
545 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
546 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 547 | export CLANG_FLAGS |
ae6b289a CF |
548 | endif |
549 | ||
315bab4e MY |
550 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
551 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
552 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
553 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
902a6898 | 554 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) |
315bab4e | 555 | |
2042b548 | 556 | ifdef config-build |
1da177e4 LT |
557 | # =========================================================================== |
558 | # *config targets only - make sure prerequisites are updated, and descend | |
559 | # in scripts/kconfig to make the *config target | |
560 | ||
561 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
562 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
563 | # used for 'make defconfig' | |
a436bb7b | 564 | include arch/$(SRCARCH)/Makefile |
315bab4e | 565 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 566 | |
36de077b | 567 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
568 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
569 | ||
36de077b | 570 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
571 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
572 | ||
2042b548 | 573 | else #!config-build |
1da177e4 LT |
574 | # =========================================================================== |
575 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
576 | # targets and others. In general all targets except *config targets. | |
577 | ||
2c1f4f12 MY |
578 | # If building an external module we do not care about the all: rule |
579 | # but instead _all depend on modules | |
580 | PHONY += all | |
581 | ifeq ($(KBUILD_EXTMOD),) | |
582 | _all: all | |
583 | else | |
584 | _all: modules | |
585 | endif | |
586 | ||
587 | # Decide whether to build built-in, modular, or both. | |
588 | # Normally, just do built-in. | |
589 | ||
590 | KBUILD_MODULES := | |
591 | KBUILD_BUILTIN := 1 | |
592 | ||
593 | # If we have only "make modules", don't compile built-in objects. | |
594 | # When we're building modules with modversions, we need to consider | |
595 | # the built-in objects during the descend as well, in order to | |
596 | # make sure the checksums are up to date before we record them. | |
597 | ||
598 | ifeq ($(MAKECMDGOALS),modules) | |
599 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
600 | endif | |
601 | ||
602 | # If we have "make <whatever> modules", compile modules | |
603 | # in addition to whatever we do anyway. | |
604 | # Just "make" or "make all" shall build modules as well | |
605 | ||
d85103ac | 606 | ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
607 | KBUILD_MODULES := 1 |
608 | endif | |
609 | ||
610 | ifeq ($(MAKECMDGOALS),) | |
611 | KBUILD_MODULES := 1 | |
612 | endif | |
613 | ||
614 | export KBUILD_MODULES KBUILD_BUILTIN | |
615 | ||
2042b548 | 616 | ifdef need-config |
d93a18f2 MY |
617 | include include/config/auto.conf |
618 | endif | |
619 | ||
1da177e4 | 620 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
621 | # Objects we will link into vmlinux / subdirs we need to visit |
622 | init-y := init/ | |
f96182e9 | 623 | drivers-y := drivers/ sound/ |
d93a18f2 | 624 | drivers-$(CONFIG_SAMPLES) += samples/ |
1da177e4 LT |
625 | net-y := net/ |
626 | libs-y := lib/ | |
627 | core-y := usr/ | |
37d9fe47 | 628 | virt-y := virt/ |
1da177e4 LT |
629 | endif # KBUILD_EXTMOD |
630 | ||
315bab4e MY |
631 | # The all: target is the default when no target is given on the |
632 | # command line. | |
633 | # This allow a user to issue only 'make' to build a kernel including modules | |
634 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
635 | all: vmlinux | |
636 | ||
637 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
638 | $(call cc-option,-fno-tree-loop-im) \ | |
639 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 640 | export CFLAGS_GCOV |
315bab4e | 641 | |
b1f4ff74 PZ |
642 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
643 | ifdef CONFIG_FUNCTION_TRACER | |
644 | CC_FLAGS_FTRACE := -pg | |
645 | endif | |
646 | ||
669e06b1 MY |
647 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
648 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
649 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
650 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
651 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
652 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
653 | export RETPOLINE_CFLAGS | |
654 | export RETPOLINE_VDSO_CFLAGS | |
655 | ||
315bab4e | 656 | include arch/$(SRCARCH)/Makefile |
1da177e4 | 657 | |
2042b548 MY |
658 | ifdef need-config |
659 | ifdef may-sync-config | |
315bab4e MY |
660 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
661 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
662 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 663 | include include/config/auto.conf.cmd |
1da177e4 | 664 | |
05850719 MY |
665 | $(KCONFIG_CONFIG): |
666 | @echo >&2 '***' | |
667 | @echo >&2 '*** Configuration file "$@" not found!' | |
668 | @echo >&2 '***' | |
669 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
670 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
671 | @echo >&2 '***' | |
672 | @/bin/false | |
1da177e4 | 673 | |
61277981 UM |
674 | # The actual configuration files used during the build are stored in |
675 | # include/generated/ and include/config/. Update them if .config is newer than | |
676 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
677 | # |
678 | # This exploits the 'multi-target pattern rule' trick. | |
679 | # The syncconfig should be executed only once to make all the targets. | |
8b41fc44 | 680 | %/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG) |
911a91c3 | 681 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
2042b548 | 682 | else # !may-sync-config |
d7942413 MY |
683 | # External modules and some install targets need include/generated/autoconf.h |
684 | # and include/config/auto.conf but do not care if they are up-to-date. | |
685 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
686 | PHONY += include/config/auto.conf |
687 | ||
688 | include/config/auto.conf: | |
264a2683 | 689 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
690 | echo >&2; \ |
691 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
692 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
693 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
694 | echo >&2 ; \ | |
9ee4e336 SR |
695 | /bin/false) |
696 | ||
d7942413 | 697 | endif # may-sync-config |
2042b548 | 698 | endif # need-config |
1da177e4 | 699 | |
a1c48bb1 | 700 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 701 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
702 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
703 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 704 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 705 | |
15f5db60 MY |
706 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
707 | KBUILD_CFLAGS += -O2 | |
708 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 | |
709 | KBUILD_CFLAGS += -O3 | |
710 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
711 | KBUILD_CFLAGS += -Os | |
815eb71e | 712 | endif |
1da177e4 | 713 | |
b303c6df MY |
714 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED |
715 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
716 | endif | |
a76bcf55 | 717 | |
69102311 JK |
718 | # Tell gcc to never replace conditional load with a non-conditional one |
719 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
720 | ||
d677a4d6 | 721 | include scripts/Makefile.kcov |
6b90bd4b ER |
722 | include scripts/Makefile.gcc-plugins |
723 | ||
1873e870 AK |
724 | ifdef CONFIG_READABLE_ASM |
725 | # Disable optimizations that make assembler listings hard to read. | |
726 | # reorder blocks reorders the control in the function | |
727 | # ipa clone creates specialized cloned functions | |
728 | # partial inlining inlines only parts of functions | |
729 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
730 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
731 | $(call cc-option,-fno-partial-inlining) | |
732 | endif | |
733 | ||
08f67461 | 734 | ifneq ($(CONFIG_FRAME_WARN),0) |
a83e4ca2 | 735 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
35bb5b1e AK |
736 | endif |
737 | ||
2a61f474 | 738 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
739 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
740 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
741 | |
742 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 743 | |
076f421d | 744 | ifdef CONFIG_CC_IS_CLANG |
a1494304 MY |
745 | KBUILD_CPPFLAGS += -Qunused-arguments |
746 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
747 | KBUILD_CFLAGS += -Wno-gnu | |
cfe17c9b | 748 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
a1494304 | 749 | KBUILD_CFLAGS += -Wno-tautological-compare |
cfe17c9b MY |
750 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
751 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
752 | # See modpost pattern 2 | |
a1494304 | 753 | KBUILD_CFLAGS += -mno-global-merge |
cfe17c9b MY |
754 | else |
755 | ||
756 | # These warnings generated too much noise in a regular build. | |
757 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 758 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
e2079e93 NC |
759 | |
760 | # Warn about unmarked fall-throughs in switch statement. | |
761 | # Disabled for clang while comment to attribute conversion happens and | |
762 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. | |
763 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) | |
cfe17c9b MY |
764 | endif |
765 | ||
0a5f4176 | 766 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 767 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 768 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 769 | else |
7e9501fd RV |
770 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
771 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
772 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
773 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
774 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
775 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 776 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 777 | endif |
7e9501fd | 778 | endif |
1da177e4 | 779 | |
709a972e KC |
780 | # Initialize all stack variables with a pattern, if desired. |
781 | ifdef CONFIG_INIT_STACK_ALL | |
782 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
783 | endif | |
784 | ||
1e88e415 | 785 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 786 | |
1da177e4 | 787 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 788 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 789 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 790 | else |
1e88e415 | 791 | DEBUG_CFLAGS += -g |
866ced95 | 792 | endif |
2288328c | 793 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 794 | endif |
bfaf2dd3 | 795 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 796 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 797 | endif |
1da177e4 | 798 | |
d6f4ceb7 | 799 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 800 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 801 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
802 | endif |
803 | ||
1e88e415 MY |
804 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
805 | export DEBUG_CFLAGS | |
806 | ||
606576ce | 807 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
808 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
809 | # gcc 5 supports generating the mcount tables directly | |
810 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
811 | CC_FLAGS_FTRACE += -mrecord-mcount | |
812 | export CC_USING_RECORD_MCOUNT := 1 | |
813 | endif | |
2f4df001 VG |
814 | ifdef CONFIG_HAVE_NOP_MCOUNT |
815 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
816 | CC_FLAGS_FTRACE += -mnop-mcount | |
817 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
818 | endif | |
819 | endif | |
07d04081 | 820 | endif |
a2546fae | 821 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
822 | ifeq ($(call cc-option-yn, -mfentry),y) |
823 | CC_FLAGS_FTRACE += -mfentry | |
824 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
825 | endif | |
a2546fae | 826 | endif |
f28bc3c3 VG |
827 | export CC_FLAGS_FTRACE |
828 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
829 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 830 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 831 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
832 | BUILD_C_RECORDMCOUNT := y |
833 | export BUILD_C_RECORDMCOUNT | |
834 | endif | |
835 | endif | |
16444a8a ACM |
836 | endif |
837 | ||
91341d4b SR |
838 | # We trigger additional mismatches with less inlining |
839 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
840 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
841 | endif | |
842 | ||
90ad4052 | 843 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
844 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
845 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
846 | endif |
847 | ||
43bd3a95 MB |
848 | ifdef CONFIG_LIVEPATCH |
849 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
850 | endif | |
851 | ||
e8e69931 | 852 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 853 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 854 | |
1da177e4 | 855 | # warn about C99 declaration after statement |
a33e7ae2 | 856 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 857 | |
0bb95f80 | 858 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 859 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 860 | |
070b98bf | 861 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 862 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 863 | |
217c3e01 SR |
864 | # disable stringop warnings in gcc 8+ |
865 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
866 | ||
fe8d0a41 | 867 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 868 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 869 | |
87e0d4f0 DB |
870 | # clang sets -fmerge-all-constants by default as optimization, but this |
871 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
872 | # need to disable it here generally. | |
873 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
874 | ||
875 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
876 | # to have actual conforming behavior enabled. | |
877 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
878 | ||
3ce120b1 LT |
879 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
880 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
881 | ||
8f7f5c9f AK |
882 | # conserve stack if available |
883 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
884 | ||
fe7c36c7 JT |
885 | # Prohibit date/time macros, which would make the build non-deterministic |
886 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
887 | ||
ea8daa7b DW |
888 | # enforce correct pointer usage |
889 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
890 | ||
c834f0e8 KC |
891 | # Require designated initializers for all marked structures |
892 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
893 | ||
a73619a8 MY |
894 | # change __FILE__ to the relative path from the srctree |
895 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
896 | ||
29be86d7 SF |
897 | # ensure -fcf-protection is disabled when using retpoline as it is |
898 | # incompatible with -mindirect-branch=thunk-extern | |
899 | ifdef CONFIG_RETPOLINE | |
900 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
901 | endif | |
902 | ||
a436bb7b MY |
903 | include scripts/Makefile.kasan |
904 | include scripts/Makefile.extrawarn | |
c6d30853 | 905 | include scripts/Makefile.ubsan |
a86fe353 | 906 | |
8cc7af75 MY |
907 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
908 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
909 | KBUILD_AFLAGS += $(KAFLAGS) | |
910 | KBUILD_CFLAGS += $(KCFLAGS) | |
52bcc330 | 911 | |
89ff7131 MY |
912 | KBUILD_LDFLAGS_MODULE += --build-id |
913 | LDFLAGS_vmlinux += --build-id | |
18991197 | 914 | |
5d7d18f5 | 915 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 916 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
917 | endif |
918 | ||
5cf896fb PC |
919 | ifeq ($(CONFIG_RELR),y) |
920 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr | |
921 | endif | |
922 | ||
80591e61 LVO |
923 | # make the checker run with the right architecture |
924 | CHECKFLAGS += --arch=$(ARCH) | |
925 | ||
14516765 LVO |
926 | # insure the checker run with the right endianness |
927 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
928 | ||
1f2f01b1 LVO |
929 | # the checker needs the correct machine size |
930 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
931 | ||
1da177e4 | 932 | # Default kernel image to build when no specific target is given. |
070b98bf | 933 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
934 | # set in the environment |
935 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
936 | # this default value | |
937 | export KBUILD_IMAGE ?= vmlinux | |
938 | ||
939 | # | |
940 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
941 | # images. Default is /boot, but you can set it to other values | |
942 | export INSTALL_PATH ?= /boot | |
943 | ||
f4d4ffc0 JC |
944 | # |
945 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
946 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
947 | # an argument if needed. Otherwise it defaults to the kernel install path | |
948 | # | |
949 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
950 | ||
1da177e4 LT |
951 | # |
952 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
953 | # relocations required by build roots. This is not defined in the | |
070b98bf | 954 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
955 | # |
956 | ||
df9df036 | 957 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
958 | export MODLIB |
959 | ||
ac031f26 | 960 | # |
3fbb43df MY |
961 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
962 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
963 | # the default option --strip-debug will be used. Otherwise, | |
964 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 965 | |
ac031f26 TT |
966 | ifdef INSTALL_MOD_STRIP |
967 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 968 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 969 | else |
2ea03891 | 970 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
971 | endif # INSTALL_MOD_STRIP=1 |
972 | else | |
2ea03891 | 973 | mod_strip_cmd = true |
ac031f26 TT |
974 | endif # INSTALL_MOD_STRIP |
975 | export mod_strip_cmd | |
976 | ||
beb50df3 BJ |
977 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
978 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
979 | # or CONFIG_MODULE_COMPRESS_XZ. | |
980 | ||
981 | mod_compress_cmd = true | |
982 | ifdef CONFIG_MODULE_COMPRESS | |
983 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 984 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
985 | endif # CONFIG_MODULE_COMPRESS_GZIP |
986 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 987 | mod_compress_cmd = xz -f |
beb50df3 BJ |
988 | endif # CONFIG_MODULE_COMPRESS_XZ |
989 | endif # CONFIG_MODULE_COMPRESS | |
990 | export mod_compress_cmd | |
991 | ||
d9d8d7ed | 992 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
993 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
994 | ||
995 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
996 | else |
997 | mod_sign_cmd = true | |
998 | endif | |
999 | export mod_sign_cmd | |
1000 | ||
056d28d1 REB |
1001 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
1002 | ||
9f0c18ae JP |
1003 | ifdef CONFIG_STACK_VALIDATION |
1004 | has_libelf := $(call try-run,\ | |
056d28d1 | 1005 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
9f0c18ae JP |
1006 | ifeq ($(has_libelf),1) |
1007 | objtool_target := tools/objtool FORCE | |
1008 | else | |
9f0c18ae JP |
1009 | SKIP_STACK_VALIDATION := 1 |
1010 | export SKIP_STACK_VALIDATION | |
1011 | endif | |
1012 | endif | |
1013 | ||
e00d8880 | 1014 | PHONY += prepare0 |
e2a666d5 | 1015 | |
394053f4 | 1016 | export MODORDER := $(extmod-prefix)modules.order |
bc35d4bd | 1017 | export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps |
47801c97 | 1018 | |
1da177e4 | 1019 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 1020 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
1021 | |
1022 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
1023 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 1024 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 | 1025 | |
1eaca4b9 MY |
1026 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
1027 | $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ | |
1028 | $(drivers-) $(net-) $(libs-) $(virt-)))) | |
1da177e4 | 1029 | |
c99f3918 | 1030 | build-dirs := $(vmlinux-dirs) |
76cd306d | 1031 | clean-dirs := $(vmlinux-alldirs) |
c99f3918 | 1032 | |
f49821ee NP |
1033 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
1034 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1035 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1036 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 1037 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
1038 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
1039 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 1040 | |
1f2bfbd0 | 1041 | # Externally visible symbols (used by link-vmlinux.sh) |
d151e971 MY |
1042 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
1043 | $(drivers-y) $(net-y) $(virt-y) | |
3a166fc2 | 1044 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
95698570 | 1045 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1046 | export LDFLAGS_vmlinux |
85f0ae7e | 1047 | # used by scripts/Makefile.package |
233c741d | 1048 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
9bb48247 | 1049 | |
d151e971 | 1050 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1051 | |
3fdc7d3f MY |
1052 | # Recurse until adjust_autoksyms.sh is satisfied |
1053 | PHONY += autoksyms_recursive | |
2441e78b | 1054 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
c99f3918 | 1055 | autoksyms_recursive: descend modules.order |
ba79d401 | 1056 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1057 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1058 | endif |
23121ca2 | 1059 | |
1f50b80a MY |
1060 | # For the kernel to actually contain only the needed exported symbols, |
1061 | # we have to build modules as well to determine what those symbols are. | |
1062 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1063 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1064 | KBUILD_MODULES := 1 | |
1065 | endif | |
1066 | ||
07a422bb MY |
1067 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1068 | ||
1069 | $(autoksyms_h): | |
1070 | $(Q)mkdir -p $(dir $@) | |
1071 | $(Q)touch $@ | |
23121ca2 | 1072 | |
fbe6e37d NP |
1073 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1074 | ||
1075 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1076 | cmd_link-vmlinux = \ |
d503ac53 | 1077 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1078 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1079 | |
3fdc7d3f | 1080 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1081 | +$(call if_changed,link-vmlinux) |
741f98fe | 1082 | |
392885ee MY |
1083 | targets := vmlinux |
1084 | ||
38385f8f | 1085 | # The actual objects are generated when descending, |
1da177e4 | 1086 | # make sure no implicit rule kicks in |
c99f3918 | 1087 | $(sort $(vmlinux-deps)): descend ; |
1da177e4 | 1088 | |
ba97df45 | 1089 | filechk_kernel.release = \ |
0d0e7718 | 1090 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1091 | |
83a35e36 | 1092 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1093 | include/config/kernel.release: FORCE |
0d0e7718 | 1094 | $(call filechk,kernel.release) |
cb58455c | 1095 | |
d8821622 MY |
1096 | # Additional helpers built in scripts/ |
1097 | # Carefully list dependencies so we do not try to build scripts twice | |
1098 | # in parallel | |
1099 | PHONY += scripts | |
60df1aee | 1100 | scripts: scripts_basic scripts_dtc |
d8821622 | 1101 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1102 | |
1da177e4 | 1103 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1104 | # or the modules are listed in "prepare". |
1105 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1106 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1107 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1108 | |
a5139fb3 | 1109 | PHONY += prepare archprepare |
5bb78269 | 1110 | |
36de077b | 1111 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
30527cef | 1112 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h |
5bb78269 | 1113 | |
65bba042 | 1114 | prepare0: archprepare |
60df1aee | 1115 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1116 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1117 | |
1da177e4 | 1118 | # All the preparing.. |
b9ab5ebb JP |
1119 | prepare: prepare0 prepare-objtool |
1120 | ||
2c1f4f12 | 1121 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1122 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1123 | ||
2c1f4f12 MY |
1124 | PHONY += asm-generic uapi-asm-generic |
1125 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1126 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1127 | generic=include/asm-generic | |
2c1f4f12 | 1128 | uapi-asm-generic: |
037fc336 MY |
1129 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1130 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1131 | |
b9ab5ebb | 1132 | PHONY += prepare-objtool |
3b27a0c8 | 1133 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1134 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1135 | ifdef CONFIG_UNWINDER_ORC | |
1136 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1137 | @false | |
1138 | else | |
1139 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1140 | endif | |
1141 | endif | |
1da177e4 | 1142 | |
1da177e4 LT |
1143 | # Generate some files |
1144 | # --------------------------------------------------------------------------- | |
1145 | ||
1146 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1147 | # needs to be updated, so this check is forced on all builds | |
1148 | ||
1149 | uts_len := 64 | |
63104eec SR |
1150 | define filechk_utsrelease.h |
1151 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1152 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1153 | exit 1; \ | |
1154 | fi; \ | |
ad774086 | 1155 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1156 | endef |
1da177e4 LT |
1157 | |
1158 | define filechk_version.h | |
ad774086 | 1159 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1160 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1161 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1162 | endef |
1163 | ||
43fee2b2 | 1164 | $(version_h): FORCE |
1da177e4 | 1165 | $(call filechk,version.h) |
223c24a7 | 1166 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1167 | |
273b281f | 1168 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1169 | $(call filechk,utsrelease.h) |
1170 | ||
179efcb4 VN |
1171 | PHONY += headerdep |
1172 | headerdep: | |
9663d989 PF |
1173 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1174 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1175 | |
8d730cfb DW |
1176 | # --------------------------------------------------------------------------- |
1177 | # Kernel headers | |
8d730cfb | 1178 | |
e6883b18 SR |
1179 | #Default location for installed headers |
1180 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1181 | |
59b2bd05 MY |
1182 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1183 | cmd_headers_install = \ | |
1184 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1185 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1186 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1187 | |
8d730cfb | 1188 | PHONY += headers_install |
59b2bd05 MY |
1189 | headers_install: headers |
1190 | $(call cmd,headers_install) | |
6520fe55 | 1191 | |
59b2bd05 | 1192 | PHONY += archheaders archscripts |
e6883b18 | 1193 | |
a5bae54c | 1194 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1195 | |
59b2bd05 MY |
1196 | PHONY += headers |
1197 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
9d022c54 | 1198 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1199 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
d5470d14 MY |
1200 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1201 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1202 | |
7ecaf069 | 1203 | # Deprecated. It is no-op now. |
68475359 | 1204 | PHONY += headers_check |
7ecaf069 MY |
1205 | headers_check: |
1206 | @: | |
68475359 | 1207 | |
e949f4c2 | 1208 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1209 | prepare: headers |
e949f4c2 | 1210 | endif |
68475359 | 1211 | |
bdd7714b MY |
1212 | PHONY += scripts_unifdef |
1213 | scripts_unifdef: scripts_basic | |
1214 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1215 | ||
5a5da78b SK |
1216 | # --------------------------------------------------------------------------- |
1217 | # Kernel selftest | |
1218 | ||
1219 | PHONY += kselftest | |
1220 | kselftest: | |
2bc84526 | 1221 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1222 | |
17eac6c2 SK |
1223 | kselftest-%: FORCE |
1224 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
dcb825a9 | 1225 | |
3d6dee7a BJZ |
1226 | PHONY += kselftest-merge |
1227 | kselftest-merge: | |
1228 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1229 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1230 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1231 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1232 | |
37c8a5fa RH |
1233 | # --------------------------------------------------------------------------- |
1234 | # Devicetree files | |
1235 | ||
1236 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1237 | dtstree := arch/$(SRCARCH)/boot/dts | |
1238 | endif | |
1239 | ||
1240 | ifneq ($(dtstree),) | |
1241 | ||
a5139fb3 | 1242 | %.dtb: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1243 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
1244 | ||
c473a8d0 | 1245 | PHONY += dtbs dtbs_install dtbs_check |
a5139fb3 | 1246 | dtbs dtbs_check: include/config/kernel.release scripts_dtc |
37c8a5fa RH |
1247 | $(Q)$(MAKE) $(build)=$(dtstree) |
1248 | ||
4f0e3a57 RH |
1249 | dtbs_check: export CHECK_DTBS=1 |
1250 | dtbs_check: dt_binding_check | |
1251 | ||
37c8a5fa RH |
1252 | dtbs_install: |
1253 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1254 | ||
1255 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1256 | all: dtbs | |
1257 | endif | |
1258 | ||
1259 | endif | |
1260 | ||
1261 | PHONY += scripts_dtc | |
1262 | scripts_dtc: scripts_basic | |
1263 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1264 | ||
c473a8d0 | 1265 | PHONY += dt_binding_check |
4f0e3a57 RH |
1266 | dt_binding_check: scripts_dtc |
1267 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1268 | ||
1da177e4 LT |
1269 | # --------------------------------------------------------------------------- |
1270 | # Modules | |
1271 | ||
1272 | ifdef CONFIG_MODULES | |
1273 | ||
070b98bf | 1274 | # By default, build modules as well |
1da177e4 | 1275 | |
73d1393e | 1276 | all: modules |
1da177e4 | 1277 | |
3fbb43df | 1278 | # Build modules |
551559e1 | 1279 | # |
3fbb43df MY |
1280 | # A module can be listed more than once in obj-m resulting in |
1281 | # duplicate lines in modules.order files. Those are removed | |
1282 | # using awk while concatenating to the final file. | |
1da177e4 | 1283 | |
4f193362 | 1284 | PHONY += modules |
8b41fc44 | 1285 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order |
b805aa0e | 1286 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
3a48a919 | 1287 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh |
1da177e4 | 1288 | |
c99f3918 MY |
1289 | modules.order: descend |
1290 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ | |
68980b47 | 1291 | |
1da177e4 | 1292 | # Target to prepare building external modules |
4f193362 | 1293 | PHONY += modules_prepare |
059bc9fc | 1294 | modules_prepare: prepare |
1da177e4 LT |
1295 | |
1296 | # Target to install modules | |
4f193362 | 1297 | PHONY += modules_install |
1da177e4 LT |
1298 | modules_install: _modinst_ _modinst_post |
1299 | ||
4f193362 | 1300 | PHONY += _modinst_ |
2da30e70 | 1301 | _modinst_: |
1da177e4 LT |
1302 | @rm -rf $(MODLIB)/kernel |
1303 | @rm -f $(MODLIB)/source | |
1304 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1305 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1306 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1307 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1308 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1309 | fi |
1bd9a468 | 1310 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
8b41fc44 | 1311 | @cp -f modules.builtin $(MODLIB)/ |
898490c0 | 1312 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
b805aa0e | 1313 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1314 | |
50a8ec31 | 1315 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1316 | # boot a modules.dep even before / is mounted read-write. However the |
1317 | # boot script depmod is the master version. | |
4f193362 | 1318 | PHONY += _modinst_post |
6d128e1e | 1319 | _modinst_post: _modinst_ |
50a8ec31 | 1320 | $(call cmd,depmod) |
1da177e4 | 1321 | |
d890f510 JB |
1322 | ifeq ($(CONFIG_MODULE_SIG), y) |
1323 | PHONY += modules_sign | |
1324 | modules_sign: | |
1325 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1326 | endif | |
1327 | ||
1da177e4 LT |
1328 | else # CONFIG_MODULES |
1329 | ||
1330 | # Modules not configured | |
1331 | # --------------------------------------------------------------------------- | |
1332 | ||
612e47ce MY |
1333 | PHONY += modules modules_install |
1334 | modules modules_install: | |
5369f550 MM |
1335 | @echo >&2 |
1336 | @echo >&2 "The present kernel configuration has modules disabled." | |
1337 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1338 | @echo >&2 "Then build a kernel with module support enabled." | |
1339 | @echo >&2 | |
1da177e4 LT |
1340 | @exit 1 |
1341 | ||
1342 | endif # CONFIG_MODULES | |
1343 | ||
1da177e4 LT |
1344 | ### |
1345 | # Cleaning is done on three levels. | |
1346 | # make clean Delete most generated files | |
1347 | # Leave enough to build external modules | |
1348 | # make mrproper Delete the current configuration, and all generated files | |
1349 | # make distclean Remove editor backup files, patch leftover files and the like | |
1350 | ||
1351 | # Directories & files removed with 'make clean' | |
b7dca6dd | 1352 | CLEAN_DIRS += include/ksym |
8b41fc44 | 1353 | CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps |
1da177e4 LT |
1354 | |
1355 | # Directories & files removed with 'make mrproper' | |
d6fc9fcb | 1356 | MRPROPER_DIRS += include/config include/generated \ |
46a63d4b MY |
1357 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
1358 | debian/ snap/ tar-install/ | |
278ae604 | 1359 | MRPROPER_FILES += .config .config.old .version \ |
46457133 | 1360 | Module.symvers \ |
fb117949 DW |
1361 | signing_key.pem signing_key.priv signing_key.x509 \ |
1362 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
46a63d4b MY |
1363 | signing_key.x509.signer vmlinux-gdb.py \ |
1364 | *.spec | |
1da177e4 | 1365 | |
46457133 MY |
1366 | # Directories & files removed with 'make distclean' |
1367 | DISTCLEAN_DIRS += | |
1368 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS | |
1369 | ||
1da177e4 LT |
1370 | # clean - Delete most, but leave enough to build external modules |
1371 | # | |
1372 | clean: rm-dirs := $(CLEAN_DIRS) | |
1373 | clean: rm-files := $(CLEAN_FILES) | |
1da177e4 | 1374 | |
76cd306d | 1375 | PHONY += archclean vmlinuxclean |
1da177e4 | 1376 | |
bd1ee804 PM |
1377 | vmlinuxclean: |
1378 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1379 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1380 | |
1381 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1382 | |
1383 | # mrproper - Delete all generated files, including .config | |
1384 | # | |
1385 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1386 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1387 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1388 | |
b421b8a6 | 1389 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1390 | $(mrproper-dirs): |
1391 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1392 | ||
b421b8a6 | 1393 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1394 | $(call cmd,rmdirs) |
1395 | $(call cmd,rmfiles) | |
1396 | ||
1397 | # distclean | |
1398 | # | |
46457133 MY |
1399 | distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) |
1400 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) | |
1401 | ||
4f193362 | 1402 | PHONY += distclean |
1da177e4 LT |
1403 | |
1404 | distclean: mrproper | |
46457133 MY |
1405 | $(call cmd,rmdirs) |
1406 | $(call cmd,rmfiles) | |
1da177e4 | 1407 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
070b98bf | 1408 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1409 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1410 | -o -name 'core' \) \ | |
1da177e4 LT |
1411 | -type f -print | xargs rm -f |
1412 | ||
1413 | ||
1414 | # Packaging of the kernel to various formats | |
1415 | # --------------------------------------------------------------------------- | |
1da177e4 | 1416 | |
bafb6747 | 1417 | %src-pkg: FORCE |
000ec95f | 1418 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1419 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1420 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1421 | |
1422 | # Brief documentation of the typical targets used | |
1423 | # --------------------------------------------------------------------------- | |
1424 | ||
5dffbe81 | 1425 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1426 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1427 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1428 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1429 | |
fe69b420 | 1430 | PHONY += help |
1da177e4 LT |
1431 | help: |
1432 | @echo 'Cleaning targets:' | |
5ea084ef | 1433 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1434 | @echo ' enough build support to build external modules' |
5ea084ef | 1435 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1436 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1437 | @echo '' |
1438 | @echo 'Configuration targets:' | |
1439 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1440 | @echo '' | |
1441 | @echo 'Other generic targets:' | |
1442 | @echo ' all - Build all targets marked with [*]' | |
1443 | @echo '* vmlinux - Build the bare kernel' | |
1444 | @echo '* modules - Build all modules' | |
9cc5d74c | 1445 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1446 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1447 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1448 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1449 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1450 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1451 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1452 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1453 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1454 | @echo ' tags/TAGS - Generate tags file for editors' |
1455 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1456 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1457 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1458 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1459 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1460 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1461 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1462 | echo '' |
31b8cc80 | 1463 | @echo 'Static analysers:' |
1da177e4 LT |
1464 | @echo ' checkstack - Generate a list of stack hogs' |
1465 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1466 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1467 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1468 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1469 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1470 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1471 | @echo '' |
eb8305ae MM |
1472 | @echo 'Tools:' |
1473 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1474 | @echo '' | |
31b8cc80 | 1475 | @echo 'Kernel selftest:' |
5a5da78b SK |
1476 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1477 | @echo ' Build, install, and boot kernel before' | |
1478 | @echo ' running kselftest on it' | |
dcb825a9 | 1479 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1480 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1481 | @echo ' .config.' |
5a5da78b | 1482 | @echo '' |
37c8a5fa RH |
1483 | @$(if $(dtstree), \ |
1484 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1485 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1486 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1487 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1488 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1489 | echo '') |
1490 | ||
31b8cc80 RD |
1491 | @echo 'Userspace tools targets:' |
1492 | @echo ' use "make tools/help"' | |
1493 | @echo ' or "cd tools; make help"' | |
1494 | @echo '' | |
1da177e4 | 1495 | @echo 'Kernel packaging:' |
000ec95f | 1496 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1497 | @echo '' |
1498 | @echo 'Documentation targets:' | |
cb43fb57 | 1499 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1500 | @echo '' |
01dee188 | 1501 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1502 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1503 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1504 | @echo '' |
1505 | @$(if $(boards), \ | |
1506 | $(foreach b, $(boards), \ | |
4234448b | 1507 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
1da177e4 | 1508 | echo '') |
5dffbe81 SB |
1509 | @$(if $(board-dirs), \ |
1510 | $(foreach b, $(board-dirs), \ | |
1511 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1512 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1513 | echo '') | |
1da177e4 LT |
1514 | |
1515 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1516 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1517 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
a64c0440 GU |
1518 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
1519 | @echo ' (sparse by default)' | |
701842e3 | 1520 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1521 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1522 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1523 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1524 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1525 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1526 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1527 | @echo '' |
1528 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1529 | @echo 'For further info see the ./README file' | |
1530 | ||
1531 | ||
5dffbe81 SB |
1532 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1533 | ||
1534 | help-boards: $(help-board-dirs) | |
1535 | ||
fbae4d58 | 1536 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1537 | |
1538 | $(help-board-dirs): help-%: | |
1539 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1540 | @$(if $(boards-per-dir), \ | |
1541 | $(foreach b, $(boards-per-dir), \ | |
1542 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1543 | echo '') | |
1544 | ||
1545 | ||
1da177e4 LT |
1546 | # Documentation targets |
1547 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1548 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1549 | linkcheckdocs dochelp refcheckdocs | |
22cba31b | 1550 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1551 | $(DOC_TARGETS): |
cb43fb57 | 1552 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1553 | |
67274c08 MY |
1554 | # Misc |
1555 | # --------------------------------------------------------------------------- | |
1556 | ||
1557 | PHONY += scripts_gdb | |
7a739ce5 | 1558 | scripts_gdb: prepare0 |
1e5ff84f | 1559 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1560 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1561 | |
1562 | ifdef CONFIG_GDB_SCRIPTS | |
1563 | all: scripts_gdb | |
1564 | endif | |
1565 | ||
1da177e4 LT |
1566 | else # KBUILD_EXTMOD |
1567 | ||
1568 | ### | |
1569 | # External module support. | |
1570 | # When building external modules the kernel used as basis is considered | |
1571 | # read-only, and no consistency checks are made and the make | |
1572 | # system is not used on the basis kernel. If updates are required | |
1573 | # in the basis kernel ordinary make commands (without M=...) must | |
1574 | # be used. | |
1575 | # | |
1576 | # The following are the only valid targets when building external | |
1577 | # modules. | |
1578 | # make M=dir clean Delete all automatically generated files | |
1579 | # make M=dir modules Make all modules in specified dir | |
1580 | # make M=dir Same as 'make M=dir modules' | |
1581 | # make M=dir modules_install | |
070b98bf | 1582 | # Install the modules built in the module directory |
1da177e4 LT |
1583 | # Assumes install directory is already created |
1584 | ||
1585 | # We are always building modules | |
1586 | KBUILD_MODULES := 1 | |
1da177e4 | 1587 | |
4f193362 | 1588 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1589 | $(objtree)/Module.symvers: |
1590 | @test -e $(objtree)/Module.symvers || ( \ | |
1591 | echo; \ | |
1592 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1593 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1594 | echo ) | |
1595 | ||
c99f3918 MY |
1596 | build-dirs := $(KBUILD_EXTMOD) |
1597 | PHONY += modules | |
1598 | modules: descend $(objtree)/Module.symvers | |
b805aa0e | 1599 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1600 | |
4f193362 | 1601 | PHONY += modules_install |
a67dc21a | 1602 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1603 | |
4f193362 PS |
1604 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1605 | PHONY += _emodinst_ | |
a67dc21a | 1606 | _emodinst_: |
a67dc21a | 1607 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1608 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1609 | |
4f193362 | 1610 | PHONY += _emodinst_post |
a67dc21a SR |
1611 | _emodinst_post: _emodinst_ |
1612 | $(call cmd,depmod) | |
1613 | ||
76cd306d | 1614 | clean-dirs := $(KBUILD_EXTMOD) |
bc35d4bd | 1615 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps |
1da177e4 | 1616 | |
d4945049 MY |
1617 | PHONY += / |
1618 | /: | |
1619 | @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' | |
1620 | ||
fe69b420 | 1621 | PHONY += help |
1da177e4 LT |
1622 | help: |
1623 | @echo ' Building external modules.' | |
1624 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1625 | @echo '' | |
1626 | @echo ' modules - default target, build the module(s)' | |
1627 | @echo ' modules_install - install the module' | |
1628 | @echo ' clean - remove generated files in module directory only' | |
1629 | @echo '' | |
06300b21 | 1630 | |
059bc9fc | 1631 | PHONY += prepare |
1da177e4 LT |
1632 | endif # KBUILD_EXTMOD |
1633 | ||
b1fbfcb4 MY |
1634 | # Single targets |
1635 | # --------------------------------------------------------------------------- | |
1636 | # To build individual files in subdirectories, you can do like this: | |
1637 | # | |
1638 | # make foo/bar/baz.s | |
1639 | # | |
1640 | # The supported suffixes for single-target are listed in 'single-targets' | |
1641 | # | |
1642 | # To build only under specific subdirectories, you can do like this: | |
1643 | # | |
1644 | # make foo/bar/baz/ | |
1645 | ||
1646 | ifdef single-build | |
1647 | ||
1648 | # .ko is special because modpost is needed | |
1649 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1650 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) | |
1651 | ||
1652 | $(single-ko): single_modpost | |
1653 | @: | |
1654 | $(single-no-ko): descend | |
1655 | @: | |
1656 | ||
1657 | ifeq ($(KBUILD_EXTMOD),) | |
1658 | # For the single build of in-tree modules, use a temporary file to avoid | |
1659 | # the situation of modules_install installing an invalid modules.order. | |
1660 | MODORDER := .modules.tmp | |
1661 | endif | |
1662 | ||
1663 | PHONY += single_modpost | |
1664 | single_modpost: $(single-no-ko) | |
1665 | $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) | |
1666 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1667 | ||
1668 | KBUILD_MODULES := 1 | |
1669 | ||
1670 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) | |
1671 | ||
1672 | # trim unrelated directories | |
1673 | build-dirs := $(foreach d, $(build-dirs), \ | |
1674 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
1675 | ||
1676 | endif | |
1677 | ||
c99f3918 MY |
1678 | # Handle descending into subdirectories listed in $(build-dirs) |
1679 | # Preset locale variables to speed up the build process. Limit locale | |
1680 | # tweaks to this spot to avoid wrong language settings when running | |
1681 | # make menuconfig etc. | |
1682 | # Error messages still appears in the original language | |
1683 | PHONY += descend $(build-dirs) | |
1684 | descend: $(build-dirs) | |
1685 | $(build-dirs): prepare | |
b1fbfcb4 | 1686 | $(Q)$(MAKE) $(build)=$@ \ |
f566e1fb | 1687 | single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ |
b1fbfcb4 | 1688 | need-builtin=1 need-modorder=1 |
c99f3918 | 1689 | |
76cd306d MY |
1690 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
1691 | PHONY += $(clean-dirs) clean | |
1692 | $(clean-dirs): | |
1693 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1694 | ||
88d7be03 MM |
1695 | clean: $(clean-dirs) |
1696 | $(call cmd,rmdirs) | |
1697 | $(call cmd,rmfiles) | |
43f67c98 | 1698 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1699 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1700 | -o -name '*.ko.*' \ |
1701 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1702 | -o -name '*.dwo' -o -name '*.lst' \ |
bbc55bde | 1703 | -o -name '*.su' -o -name '*.mod' \ |
88d7be03 | 1704 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1705 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1706 | -o -name '*.asn1.[ch]' \ |
88d7be03 | 1707 | -o -name '*.symtypes' -o -name 'modules.order' \ |
8b41fc44 | 1708 | -o -name '.tmp_*.o.*' \ |
6b90bd4b | 1709 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1710 | -o -name '*.ll' \ |
88d7be03 MM |
1711 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1712 | ||
1da177e4 LT |
1713 | # Generate tags for editors |
1714 | # --------------------------------------------------------------------------- | |
a680eedc | 1715 | quiet_cmd_tags = GEN $@ |
858805b3 | 1716 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 1717 | |
f4ed1009 | 1718 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1719 | $(call cmd,tags) |
1720 | ||
eb8305ae MM |
1721 | # Script to generate missing namespace dependencies |
1722 | # --------------------------------------------------------------------------- | |
1723 | ||
1724 | PHONY += nsdeps | |
bff9c62b | 1725 | nsdeps: export KBUILD_NSDEPS=1 |
eb8305ae | 1726 | nsdeps: modules |
bff9c62b | 1727 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
eb8305ae | 1728 | |
1da177e4 LT |
1729 | # Scripts to check various things for consistency |
1730 | # --------------------------------------------------------------------------- | |
1731 | ||
279f3dd3 PF |
1732 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1733 | ||
1da177e4 | 1734 | includecheck: |
436f876c | 1735 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1736 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1737 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1738 | |
1739 | versioncheck: | |
2ee2d292 | 1740 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1741 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1742 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1743 | |
74425eee | 1744 | coccicheck: |
858805b3 | 1745 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 1746 | |
1da177e4 LT |
1747 | namespacecheck: |
1748 | $(PERL) $(srctree)/scripts/namespace.pl | |
1749 | ||
295ac051 AB |
1750 | export_report: |
1751 | $(PERL) $(srctree)/scripts/export_report.pl | |
1752 | ||
c398ff00 | 1753 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1754 | |
011e3a9a JD |
1755 | # UML needs a little special treatment here. It wants to use the host |
1756 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1757 | # else wants $(ARCH), including people doing cross-builds, which means | |
1758 | # that $(SUBARCH) doesn't work here. | |
1759 | ifeq ($(ARCH), um) | |
1760 | CHECKSTACK_ARCH := $(SUBARCH) | |
1761 | else | |
1762 | CHECKSTACK_ARCH := $(ARCH) | |
1763 | endif | |
1da177e4 LT |
1764 | checkstack: |
1765 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 1766 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1767 | |
7b8ea53d AW |
1768 | kernelrelease: |
1769 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1770 | |
cb58455c | 1771 | kernelversion: |
2244cbd8 | 1772 | @echo $(KERNELVERSION) |
1da177e4 | 1773 | |
c398ff00 MM |
1774 | image_name: |
1775 | @echo $(KBUILD_IMAGE) | |
1776 | ||
ea01fa9f | 1777 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1778 | |
1779 | ifeq ($(quiet),silent_) | |
1780 | tools_silent=s | |
1781 | endif | |
1782 | ||
ea01fa9f | 1783 | tools/: FORCE |
bf35182f | 1784 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1785 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
ea01fa9f BP |
1786 | |
1787 | tools/%: FORCE | |
bf35182f | 1788 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1789 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
ea01fa9f | 1790 | |
38385f8f | 1791 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1792 | # =========================================================================== |
1793 | ||
1794 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1795 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1796 | ||
1797 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1798 | cmd_rmfiles = rm -f $(rm-files) | |
1799 | ||
bc3c26fe | 1800 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1801 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1802 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1803 | $(KERNELRELEASE) |
50a8ec31 | 1804 | |
392885ee MY |
1805 | # read saved command lines for existing targets |
1806 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1807 | |
b999923c | 1808 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 1809 | |
2042b548 MY |
1810 | endif # config-targets |
1811 | endif # mixed-build | |
1812 | endif # need-sub-make | |
1da177e4 | 1813 | |
4f193362 | 1814 | PHONY += FORCE |
1da177e4 | 1815 | FORCE: |
4f193362 | 1816 | |
bd412d81 | 1817 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1818 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1819 | .PHONY: $(PHONY) |