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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
bfeffd15 | 2 | VERSION = 5 |
5f9e832c | 3 | PATCHLEVEL = 3 |
55922c9d | 4 | SUBLEVEL = 0 |
5f9e832c | 5 | EXTRAVERSION = -rc1 |
6fbc7275 | 6 | NAME = Bobtail Squid |
1da177e4 LT |
7 | |
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
ba634ece MY |
14 | # That's our default target when none is given on the command line |
15 | PHONY := _all | |
16 | _all: | |
17 | ||
1da177e4 LT |
18 | # We are using a recursive build, so we need to do a little thinking |
19 | # to get the ordering right. | |
20 | # | |
21 | # Most importantly: sub-Makefiles should only ever modify files in | |
22 | # their own directory. If in some directory we have a dependency on | |
23 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 24 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
25 | # turn into vmlinux), we will call a sub make in that other dir, and |
26 | # after that we are sure that everything which is in that other dir | |
27 | # is now up to date. | |
28 | # | |
29 | # The only cases where we need to modify files which have global | |
30 | # effects are thus separated out and done before the recursive | |
31 | # descending is started. They are now explicitly listed as the | |
32 | # prepare rule. | |
33 | ||
221cc2d2 | 34 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
35 | |
36 | # Do not use make's built-in rules and variables | |
37 | # (this increases performance and avoids hard-to-debug behaviour) | |
38 | MAKEFLAGS += -rR | |
39 | ||
40 | # Avoid funny character set dependencies | |
41 | unexport LC_ALL | |
42 | LC_COLLATE=C | |
43 | LC_NUMERIC=C | |
44 | export LC_COLLATE LC_NUMERIC | |
45 | ||
46 | # Avoid interference with shell env settings | |
47 | unexport GREP_OPTIONS | |
48 | ||
066b7ed9 MM |
49 | # Beautify output |
50 | # --------------------------------------------------------------------------- | |
51 | # | |
52 | # Normally, we echo the whole command before executing it. By making | |
53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
54 | # $(quiet) to choose other forms of output instead, e.g. | |
55 | # | |
56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
58 | # | |
59 | # If $(quiet) is empty, the whole command will be printed. | |
60 | # If it is set to "quiet_", only the short version will be printed. | |
61 | # If it is set to "silent_", nothing will be printed at all, since | |
62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
63 | # | |
64 | # A simple variant is to prefix commands with $(Q) - that's useful | |
65 | # for commands that shall be hidden in non-verbose mode. | |
66 | # | |
67 | # $(Q)ln $@ :< | |
68 | # | |
69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
71 | # | |
1da177e4 LT |
72 | # To put more focus on warnings, be less verbose as default |
73 | # Use 'make V=1' to see the full commands | |
74 | ||
b8b0618c CR |
75 | ifeq ("$(origin V)", "command line") |
76 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
77 | endif |
78 | ifndef KBUILD_VERBOSE | |
79 | KBUILD_VERBOSE = 0 | |
80 | endif | |
81 | ||
066b7ed9 MM |
82 | ifeq ($(KBUILD_VERBOSE),1) |
83 | quiet = | |
84 | Q = | |
85 | else | |
86 | quiet=quiet_ | |
87 | Q = @ | |
88 | endif | |
89 | ||
90 | # If the user is running make -s (silent mode), suppress echoing of | |
91 | # commands | |
92 | ||
6f0fa58e | 93 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 MM |
94 | quiet=silent_ |
95 | endif | |
066b7ed9 MM |
96 | |
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
25b146c5 MY |
99 | # Kbuild will save output files in the current working directory. |
100 | # This does not need to match to the root of the kernel source tree. | |
101 | # | |
102 | # For example, you can do this: | |
103 | # | |
104 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
105 | # | |
106 | # If you want to save output files in a different location, there are | |
107 | # two syntaxes to specify it. | |
108 | # | |
1da177e4 LT |
109 | # 1) O= |
110 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 111 | # |
1da177e4 | 112 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
113 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
114 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
115 | # |
116 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
117 | # variable. | |
118 | ||
25b146c5 | 119 | # Do we want to change the working directory? |
b8b0618c CR |
120 | ifeq ("$(origin O)", "command line") |
121 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
122 | endif |
123 | ||
25b146c5 MY |
124 | ifneq ($(KBUILD_OUTPUT),) |
125 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
126 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
127 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
128 | $(if $(abs_objtree),, \ | |
129 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
130 | ||
131 | # $(realpath ...) resolves symlinks | |
132 | abs_objtree := $(realpath $(abs_objtree)) | |
133 | else | |
134 | abs_objtree := $(CURDIR) | |
135 | endif # ifneq ($(KBUILD_OUTPUT),) | |
136 | ||
137 | ifeq ($(abs_objtree),$(CURDIR)) | |
138 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
139 | MAKEFLAGS += --no-print-directory | |
140 | else | |
141 | need-sub-make := 1 | |
51193b76 RJ |
142 | endif |
143 | ||
25b146c5 | 144 | abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) |
1da177e4 | 145 | |
25b146c5 MY |
146 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
147 | $(error source directory cannot contain spaces or colons) | |
148 | endif | |
1da177e4 | 149 | |
25b146c5 | 150 | ifneq ($(abs_srctree),$(abs_objtree)) |
80463f1b MY |
151 | # Look for make include files relative to root of kernel src |
152 | # | |
153 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
25b146c5 MY |
154 | # once after the Makefile is read. We need to invoke sub-make. |
155 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
688931a5 | 156 | need-sub-make := 1 |
25b146c5 | 157 | endif |
3812b8c5 | 158 | |
688931a5 MY |
159 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
160 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
161 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
162 | need-sub-make := 1 | |
163 | # Cancel implicit rules for this Makefile. | |
164 | $(lastword $(MAKEFILE_LIST)): ; | |
165 | endif | |
166 | ||
25b146c5 | 167 | export abs_srctree abs_objtree |
221cc2d2 MY |
168 | export sub_make_done := 1 |
169 | ||
688931a5 MY |
170 | ifeq ($(need-sub-make),1) |
171 | ||
0b35786d MM |
172 | PHONY += $(MAKECMDGOALS) sub-make |
173 | ||
0209987f | 174 | $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 175 | @: |
0b35786d | 176 | |
c4e6fff1 | 177 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 178 | sub-make: |
25b146c5 | 179 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 180 | |
688931a5 | 181 | endif # need-sub-make |
221cc2d2 | 182 | endif # sub_make_done |
688931a5 | 183 | |
1da177e4 | 184 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 185 | ifeq ($(need-sub-make),) |
1da177e4 | 186 | |
7ff52571 MY |
187 | # Do not print "Entering directory ...", |
188 | # but we want to display it when entering to the output directory | |
189 | # so that IDEs/editors are able to understand relative filenames. | |
190 | MAKEFLAGS += --no-print-directory | |
191 | ||
aa55c8e2 MY |
192 | # Call a source code checker (by default, "sparse") as part of the |
193 | # C compilation. | |
194 | # | |
195 | # Use 'make C=1' to enable checking of only re-compiled files. | |
196 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
197 | # of whether they are re-compiled or not. | |
198 | # | |
036db11c C |
199 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
200 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
201 | |
202 | ifeq ("$(origin C)", "command line") | |
203 | KBUILD_CHECKSRC = $(C) | |
204 | endif | |
205 | ifndef KBUILD_CHECKSRC | |
206 | KBUILD_CHECKSRC = 0 | |
207 | endif | |
208 | ||
209 | # Use make M=dir to specify directory of external module to build | |
210 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
211 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
212 | ifdef SUBDIRS | |
0126be38 MY |
213 | $(warning ================= WARNING ================) |
214 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
4e8fc3f5 MY |
215 | $(warning ) |
216 | $(warning If you are building an individual subdirectory) | |
217 | $(warning in the kernel tree, you can do like this:) | |
218 | $(warning $$ make path/to/dir/you/want/to/build/) | |
219 | $(warning (Do not forget the trailing slash)) | |
220 | $(warning ) | |
221 | $(warning If you are building an external module,) | |
0126be38 MY |
222 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) |
223 | $(warning ==========================================) | |
aa55c8e2 MY |
224 | KBUILD_EXTMOD ?= $(SUBDIRS) |
225 | endif | |
226 | ||
227 | ifeq ("$(origin M)", "command line") | |
228 | KBUILD_EXTMOD := $(M) | |
229 | endif | |
230 | ||
051f278e MY |
231 | export KBUILD_CHECKSRC KBUILD_EXTMOD |
232 | ||
25b146c5 | 233 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
234 | # building in the source tree |
235 | srctree := . | |
051f278e | 236 | building_out_of_srctree := |
9da0763b | 237 | else |
25b146c5 | 238 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
239 | # building in a subdirectory of the source tree |
240 | srctree := .. | |
241 | else | |
25b146c5 | 242 | srctree := $(abs_srctree) |
9da0763b | 243 | endif |
051f278e | 244 | building_out_of_srctree := 1 |
9da0763b | 245 | endif |
2c1f4f12 | 246 | |
95fd3f87 MY |
247 | ifneq ($(KBUILD_ABS_SRCTREE),) |
248 | srctree := $(abs_srctree) | |
249 | endif | |
2c1f4f12 | 250 | |
7e1c0477 | 251 | objtree := . |
6b12de69 | 252 | VPATH := $(srctree) |
1da177e4 | 253 | |
051f278e | 254 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 255 | |
2c1f4f12 MY |
256 | # To make sure we do not include .config for any of the *config targets |
257 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
258 | # It is allowed to specify more targets when calling make, including | |
259 | # mixing *config targets and build targets. | |
260 | # For example 'make oldconfig all'. | |
261 | # Detect when mixed targets is specified, and make a second invocation | |
262 | # of make so .config is not included in this case either (for *config). | |
263 | ||
264 | version_h := include/generated/uapi/linux/version.h | |
265 | old_version_h := include/linux/version.h | |
266 | ||
22340a06 MY |
267 | clean-targets := %clean mrproper cleandocs |
268 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 269 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 270 | $(version_h) headers headers_% archheaders archscripts \ |
63e31a67 | 271 | %asm-generic kernelversion %src-pkg |
a29d4d8c MY |
272 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
273 | kernelrelease | |
2c1f4f12 | 274 | |
d7942413 MY |
275 | config-targets := 0 |
276 | mixed-targets := 0 | |
277 | dot-config := 1 | |
278 | may-sync-config := 1 | |
2c1f4f12 MY |
279 | |
280 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
281 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
282 | dot-config := 0 | |
283 | endif | |
284 | endif | |
285 | ||
d7942413 MY |
286 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
287 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
288 | may-sync-config := 0 | |
289 | endif | |
290 | endif | |
291 | ||
292 | ifneq ($(KBUILD_EXTMOD),) | |
293 | may-sync-config := 0 | |
294 | endif | |
295 | ||
2c1f4f12 MY |
296 | ifeq ($(KBUILD_EXTMOD),) |
297 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
298 | config-targets := 1 | |
299 | ifneq ($(words $(MAKECMDGOALS)),1) | |
300 | mixed-targets := 1 | |
301 | endif | |
302 | endif | |
303 | endif | |
22340a06 MY |
304 | |
305 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
306 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
307 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
308 | mixed-targets := 1 | |
309 | endif | |
310 | endif | |
311 | ||
2c1f4f12 MY |
312 | # install and modules_install need also be processed one by one |
313 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
314 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
315 | mixed-targets := 1 | |
316 | endif | |
317 | endif | |
318 | ||
319 | ifeq ($(mixed-targets),1) | |
320 | # =========================================================================== | |
321 | # We're called with mixed targets (*config and build targets). | |
322 | # Handle them one by one. | |
323 | ||
324 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
325 | ||
326 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
327 | @: | |
328 | ||
329 | __build_one_by_one: | |
330 | $(Q)set -e; \ | |
331 | for i in $(MAKECMDGOALS); do \ | |
332 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
333 | done | |
334 | ||
335 | else | |
336 | ||
2c1f4f12 MY |
337 | include scripts/Kbuild.include |
338 | ||
339 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
340 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
341 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
342 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
343 | ||
b2d35fa5 | 344 | include scripts/subarch.include |
1da177e4 LT |
345 | |
346 | # Cross compiling and selecting different set of gcc/bin-utils | |
347 | # --------------------------------------------------------------------------- | |
348 | # | |
349 | # When performing cross compilation for other architectures ARCH shall be set | |
350 | # to the target architecture. (See arch/* for the possibilities). | |
351 | # ARCH can be set during invocation of make: | |
352 | # make ARCH=ia64 | |
353 | # Another way is to have ARCH set in the environment. | |
354 | # The default ARCH is the host where make is executed. | |
355 | ||
356 | # CROSS_COMPILE specify the prefix used for all executables used | |
357 | # during compilation. Only gcc and related bin-utils executables | |
358 | # are prefixed with $(CROSS_COMPILE). | |
359 | # CROSS_COMPILE can be set on the command line | |
360 | # make CROSS_COMPILE=ia64-linux- | |
361 | # Alternatively CROSS_COMPILE can be set in the environment. | |
362 | # Default value for CROSS_COMPILE is not to prefix executables | |
363 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 364 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
365 | |
366 | # Architecture as present in compile.h | |
6752ed90 TG |
367 | UTS_MACHINE := $(ARCH) |
368 | SRCARCH := $(ARCH) | |
1da177e4 | 369 | |
d746d647 SR |
370 | # Additional ARCH settings for x86 |
371 | ifeq ($(ARCH),i386) | |
372 | SRCARCH := x86 | |
373 | endif | |
374 | ifeq ($(ARCH),x86_64) | |
375 | SRCARCH := x86 | |
376 | endif | |
74b469f2 | 377 | |
5e538790 | 378 | # Additional ARCH settings for sparc |
e69f58c0 NK |
379 | ifeq ($(ARCH),sparc32) |
380 | SRCARCH := sparc | |
381 | endif | |
a439fe51 | 382 | ifeq ($(ARCH),sparc64) |
5e538790 | 383 | SRCARCH := sparc |
a439fe51 | 384 | endif |
2fb9b1bd | 385 | |
3cc000b5 PM |
386 | # Additional ARCH settings for sh |
387 | ifeq ($(ARCH),sh64) | |
388 | SRCARCH := sh | |
389 | endif | |
390 | ||
14cdd3c4 | 391 | KCONFIG_CONFIG ?= .config |
41263fc6 | 392 | export KCONFIG_CONFIG |
14cdd3c4 | 393 | |
1da177e4 LT |
394 | # SHELL used by kbuild |
395 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
396 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
397 | else echo sh; fi ; fi) | |
398 | ||
6d79a7b4 MY |
399 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
400 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
401 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 402 | |
070b98bf SR |
403 | HOSTCC = gcc |
404 | HOSTCXX = g++ | |
96f14fe7 | 405 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
f92d19e0 LA |
406 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
407 | $(HOSTCFLAGS) | |
408 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
409 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
410 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 411 | |
1da177e4 | 412 | # Make variables (CC, etc...) |
1da177e4 LT |
413 | AS = $(CROSS_COMPILE)as |
414 | LD = $(CROSS_COMPILE)ld | |
415 | CC = $(CROSS_COMPILE)gcc | |
416 | CPP = $(CC) -E | |
417 | AR = $(CROSS_COMPILE)ar | |
418 | NM = $(CROSS_COMPILE)nm | |
419 | STRIP = $(CROSS_COMPILE)strip | |
420 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
421 | OBJDUMP = $(CROSS_COMPILE)objdump | |
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 MY |
430 | PYTHON2 = python2 |
431 | PYTHON3 = python3 | |
1da177e4 LT |
432 | CHECK = sparse |
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 | |
472 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
d503ac53 | 473 | KBUILD_LDFLAGS := |
433dc2eb | 474 | GCC_PLUGINS_CFLAGS := |
1da177e4 | 475 | |
96f14fe7 | 476 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
e83b9f55 | 477 | export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
88110713 | 478 | export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
10844aeb | 479 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 480 | |
d503ac53 | 481 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 AK |
482 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
483 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 484 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 485 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 486 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 487 | export KBUILD_ARFLAGS |
1da177e4 | 488 | |
1da177e4 LT |
489 | # Files to ignore in find ... statements |
490 | ||
ae63b2d7 PB |
491 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
492 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
493 | -prune -o | |
450c6076 JJ |
494 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
495 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
496 | |
497 | # =========================================================================== | |
498 | # Rules shared between *config targets and build targets | |
499 | ||
312a3d09 | 500 | # Basic helpers built in scripts/basic/ |
4f193362 | 501 | PHONY += scripts_basic |
1da177e4 LT |
502 | scripts_basic: |
503 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 504 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 505 | |
4f193362 | 506 | PHONY += outputmakefile |
fd5f0cd6 JB |
507 | # outputmakefile generates a Makefile in the output directory, if using a |
508 | # separate output directory. This allows convenient use of make in the | |
509 | # output directory. | |
3a51ff34 VK |
510 | # At the same time when output Makefile generated, generate .gitignore to |
511 | # ignore whole output directory | |
1da177e4 | 512 | outputmakefile: |
051f278e | 513 | ifdef building_out_of_srctree |
92979997 | 514 | $(Q)ln -fsn $(srctree) source |
4fd61277 | 515 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
156e7cbb MY |
516 | $(Q)test -e .gitignore || \ |
517 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 518 | endif |
1da177e4 | 519 | |
99516742 | 520 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
ae6b289a | 521 | ifneq ($(CROSS_COMPILE),) |
238bcbc4 | 522 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
ad15006c | 523 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
238bcbc4 | 524 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
ef8c4ed9 | 525 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
ae6b289a CF |
526 | endif |
527 | ifneq ($(GCC_TOOLCHAIN),) | |
238bcbc4 | 528 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
ae6b289a | 529 | endif |
876a0600 | 530 | ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) |
238bcbc4 | 531 | CLANG_FLAGS += -no-integrated-as |
876a0600 | 532 | endif |
589834b3 | 533 | CLANG_FLAGS += -Werror=unknown-warning-option |
238bcbc4 MY |
534 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
535 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
3bd98050 | 536 | export CLANG_FLAGS |
ae6b289a CF |
537 | endif |
538 | ||
315bab4e MY |
539 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
540 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
541 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
542 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
902a6898 | 543 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) |
315bab4e | 544 | |
1da177e4 LT |
545 | ifeq ($(config-targets),1) |
546 | # =========================================================================== | |
547 | # *config targets only - make sure prerequisites are updated, and descend | |
548 | # in scripts/kconfig to make the *config target | |
549 | ||
550 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
551 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
552 | # used for 'make defconfig' | |
a436bb7b | 553 | include arch/$(SRCARCH)/Makefile |
315bab4e | 554 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 555 | |
31110ebb | 556 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
557 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
558 | ||
559 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
560 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
561 | ||
562 | else | |
563 | # =========================================================================== | |
564 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
565 | # targets and others. In general all targets except *config targets. | |
566 | ||
2c1f4f12 MY |
567 | # If building an external module we do not care about the all: rule |
568 | # but instead _all depend on modules | |
569 | PHONY += all | |
570 | ifeq ($(KBUILD_EXTMOD),) | |
571 | _all: all | |
572 | else | |
573 | _all: modules | |
574 | endif | |
575 | ||
576 | # Decide whether to build built-in, modular, or both. | |
577 | # Normally, just do built-in. | |
578 | ||
579 | KBUILD_MODULES := | |
580 | KBUILD_BUILTIN := 1 | |
581 | ||
582 | # If we have only "make modules", don't compile built-in objects. | |
583 | # When we're building modules with modversions, we need to consider | |
584 | # the built-in objects during the descend as well, in order to | |
585 | # make sure the checksums are up to date before we record them. | |
586 | ||
587 | ifeq ($(MAKECMDGOALS),modules) | |
588 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
589 | endif | |
590 | ||
591 | # If we have "make <whatever> modules", compile modules | |
592 | # in addition to whatever we do anyway. | |
593 | # Just "make" or "make all" shall build modules as well | |
594 | ||
595 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
596 | KBUILD_MODULES := 1 | |
597 | endif | |
598 | ||
599 | ifeq ($(MAKECMDGOALS),) | |
600 | KBUILD_MODULES := 1 | |
601 | endif | |
602 | ||
603 | export KBUILD_MODULES KBUILD_BUILTIN | |
604 | ||
d93a18f2 MY |
605 | ifeq ($(dot-config),1) |
606 | include include/config/auto.conf | |
607 | endif | |
608 | ||
1da177e4 | 609 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
610 | # Objects we will link into vmlinux / subdirs we need to visit |
611 | init-y := init/ | |
f96182e9 | 612 | drivers-y := drivers/ sound/ |
d93a18f2 | 613 | drivers-$(CONFIG_SAMPLES) += samples/ |
43c78d88 | 614 | drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/ |
1da177e4 LT |
615 | net-y := net/ |
616 | libs-y := lib/ | |
617 | core-y := usr/ | |
37d9fe47 | 618 | virt-y := virt/ |
1da177e4 LT |
619 | endif # KBUILD_EXTMOD |
620 | ||
315bab4e MY |
621 | # The all: target is the default when no target is given on the |
622 | # command line. | |
623 | # This allow a user to issue only 'make' to build a kernel including modules | |
624 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
625 | all: vmlinux | |
626 | ||
627 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
628 | $(call cc-option,-fno-tree-loop-im) \ | |
629 | $(call cc-disable-warning,maybe-uninitialized,) | |
5aadfdeb | 630 | export CFLAGS_GCOV |
315bab4e | 631 | |
b1f4ff74 PZ |
632 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
633 | ifdef CONFIG_FUNCTION_TRACER | |
634 | CC_FLAGS_FTRACE := -pg | |
635 | endif | |
636 | ||
669e06b1 MY |
637 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
638 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
639 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
640 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
641 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
642 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
643 | export RETPOLINE_CFLAGS | |
644 | export RETPOLINE_VDSO_CFLAGS | |
645 | ||
315bab4e MY |
646 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
647 | # values of the respective KBUILD_* variables | |
648 | ARCH_CPPFLAGS := | |
649 | ARCH_AFLAGS := | |
650 | ARCH_CFLAGS := | |
651 | include arch/$(SRCARCH)/Makefile | |
1da177e4 | 652 | |
315bab4e | 653 | ifeq ($(dot-config),1) |
d7942413 | 654 | ifeq ($(may-sync-config),1) |
315bab4e MY |
655 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
656 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
657 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 658 | include include/config/auto.conf.cmd |
1da177e4 | 659 | |
05850719 MY |
660 | $(KCONFIG_CONFIG): |
661 | @echo >&2 '***' | |
662 | @echo >&2 '*** Configuration file "$@" not found!' | |
663 | @echo >&2 '***' | |
664 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
665 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
666 | @echo >&2 '***' | |
667 | @/bin/false | |
1da177e4 | 668 | |
61277981 UM |
669 | # The actual configuration files used during the build are stored in |
670 | # include/generated/ and include/config/. Update them if .config is newer than | |
671 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
672 | # |
673 | # This exploits the 'multi-target pattern rule' trick. | |
674 | # The syncconfig should be executed only once to make all the targets. | |
675 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
911a91c3 | 676 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
3041e47e | 677 | else |
d7942413 MY |
678 | # External modules and some install targets need include/generated/autoconf.h |
679 | # and include/config/auto.conf but do not care if they are up-to-date. | |
680 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
681 | PHONY += include/config/auto.conf |
682 | ||
683 | include/config/auto.conf: | |
264a2683 | 684 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
685 | echo >&2; \ |
686 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
687 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
688 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
689 | echo >&2 ; \ | |
9ee4e336 SR |
690 | /bin/false) |
691 | ||
d7942413 | 692 | endif # may-sync-config |
9ee4e336 | 693 | endif # $(dot-config) |
1da177e4 | 694 | |
a1c48bb1 | 695 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
ef6000b4 | 696 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
697 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
698 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 699 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 700 | |
1da177e4 | 701 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
a75bb4eb | 702 | KBUILD_CFLAGS += -Os |
815eb71e AB |
703 | else |
704 | KBUILD_CFLAGS += -O2 | |
705 | endif | |
1da177e4 | 706 | |
b303c6df MY |
707 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED |
708 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
709 | endif | |
a76bcf55 | 710 | |
69102311 JK |
711 | # Tell gcc to never replace conditional load with a non-conditional one |
712 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
713 | ||
d677a4d6 | 714 | include scripts/Makefile.kcov |
6b90bd4b ER |
715 | include scripts/Makefile.gcc-plugins |
716 | ||
1873e870 AK |
717 | ifdef CONFIG_READABLE_ASM |
718 | # Disable optimizations that make assembler listings hard to read. | |
719 | # reorder blocks reorders the control in the function | |
720 | # ipa clone creates specialized cloned functions | |
721 | # partial inlining inlines only parts of functions | |
722 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
723 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
724 | $(call cc-option,-fno-partial-inlining) | |
725 | endif | |
726 | ||
08f67461 | 727 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
728 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
729 | endif | |
730 | ||
2a61f474 | 731 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
050e9baa LT |
732 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
733 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
734 | |
735 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 736 | |
076f421d | 737 | ifdef CONFIG_CC_IS_CLANG |
a1494304 MY |
738 | KBUILD_CPPFLAGS += -Qunused-arguments |
739 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
740 | KBUILD_CFLAGS += -Wno-gnu | |
cfe17c9b | 741 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
a1494304 | 742 | KBUILD_CFLAGS += -Wno-tautological-compare |
cfe17c9b MY |
743 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
744 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
745 | # See modpost pattern 2 | |
a1494304 | 746 | KBUILD_CFLAGS += -mno-global-merge |
cfe17c9b MY |
747 | else |
748 | ||
749 | # These warnings generated too much noise in a regular build. | |
750 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
9df3e7a7 | 751 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
cfe17c9b MY |
752 | endif |
753 | ||
0a5f4176 | 754 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 755 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 756 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 757 | else |
7e9501fd RV |
758 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
759 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
760 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
761 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
762 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
763 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 764 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 765 | endif |
7e9501fd | 766 | endif |
1da177e4 | 767 | |
709a972e KC |
768 | # Initialize all stack variables with a pattern, if desired. |
769 | ifdef CONFIG_INIT_STACK_ALL | |
770 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
771 | endif | |
772 | ||
1e88e415 | 773 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
2062afb4 | 774 | |
1da177e4 | 775 | ifdef CONFIG_DEBUG_INFO |
866ced95 | 776 | ifdef CONFIG_DEBUG_INFO_SPLIT |
9d937444 | 777 | DEBUG_CFLAGS += -gsplit-dwarf |
866ced95 | 778 | else |
1e88e415 | 779 | DEBUG_CFLAGS += -g |
866ced95 | 780 | endif |
2288328c | 781 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 782 | endif |
bfaf2dd3 | 783 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
9d937444 | 784 | DEBUG_CFLAGS += -gdwarf-4 |
bfaf2dd3 | 785 | endif |
1da177e4 | 786 | |
d6f4ceb7 | 787 | ifdef CONFIG_DEBUG_INFO_REDUCED |
1e88e415 | 788 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
e82c4bb8 | 789 | $(call cc-option,-fno-var-tracking) |
d6f4ceb7 AK |
790 | endif |
791 | ||
1e88e415 MY |
792 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
793 | export DEBUG_CFLAGS | |
794 | ||
606576ce | 795 | ifdef CONFIG_FUNCTION_TRACER |
07d04081 VG |
796 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
797 | # gcc 5 supports generating the mcount tables directly | |
798 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
799 | CC_FLAGS_FTRACE += -mrecord-mcount | |
800 | export CC_USING_RECORD_MCOUNT := 1 | |
801 | endif | |
2f4df001 VG |
802 | ifdef CONFIG_HAVE_NOP_MCOUNT |
803 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
804 | CC_FLAGS_FTRACE += -mnop-mcount | |
805 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
806 | endif | |
807 | endif | |
07d04081 | 808 | endif |
a2546fae | 809 | ifdef CONFIG_HAVE_FENTRY |
f28bc3c3 VG |
810 | ifeq ($(call cc-option-yn, -mfentry),y) |
811 | CC_FLAGS_FTRACE += -mfentry | |
812 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
813 | endif | |
a2546fae | 814 | endif |
f28bc3c3 VG |
815 | export CC_FLAGS_FTRACE |
816 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
817 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
72441cb1 | 818 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 819 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
820 | BUILD_C_RECORDMCOUNT := y |
821 | export BUILD_C_RECORDMCOUNT | |
822 | endif | |
823 | endif | |
16444a8a ACM |
824 | endif |
825 | ||
91341d4b SR |
826 | # We trigger additional mismatches with less inlining |
827 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
828 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
829 | endif | |
830 | ||
90ad4052 | 831 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 MY |
832 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
833 | LDFLAGS_vmlinux += --gc-sections | |
90ad4052 MY |
834 | endif |
835 | ||
43bd3a95 MB |
836 | ifdef CONFIG_LIVEPATCH |
837 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
838 | endif | |
839 | ||
e8e69931 | 840 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 841 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 842 | |
1da177e4 | 843 | # warn about C99 declaration after statement |
a33e7ae2 | 844 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 845 | |
0bb95f80 | 846 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 847 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 848 | |
070b98bf | 849 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 850 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 851 | |
217c3e01 SR |
852 | # disable stringop warnings in gcc 8+ |
853 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
854 | ||
fe8d0a41 | 855 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 856 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 857 | |
87e0d4f0 DB |
858 | # clang sets -fmerge-all-constants by default as optimization, but this |
859 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
860 | # need to disable it here generally. | |
861 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
862 | ||
863 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
864 | # to have actual conforming behavior enabled. | |
865 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
866 | ||
3ce120b1 LT |
867 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
868 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
869 | ||
8f7f5c9f AK |
870 | # conserve stack if available |
871 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
872 | ||
fe7c36c7 JT |
873 | # Prohibit date/time macros, which would make the build non-deterministic |
874 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
875 | ||
ea8daa7b DW |
876 | # enforce correct pointer usage |
877 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
878 | ||
c834f0e8 KC |
879 | # Require designated initializers for all marked structures |
880 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
881 | ||
a73619a8 MY |
882 | # change __FILE__ to the relative path from the srctree |
883 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
884 | ||
29be86d7 SF |
885 | # ensure -fcf-protection is disabled when using retpoline as it is |
886 | # incompatible with -mindirect-branch=thunk-extern | |
887 | ifdef CONFIG_RETPOLINE | |
888 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
889 | endif | |
890 | ||
40df759e MM |
891 | # use the deterministic mode of AR if available |
892 | KBUILD_ARFLAGS := $(call ar-option,D) | |
893 | ||
a436bb7b MY |
894 | include scripts/Makefile.kasan |
895 | include scripts/Makefile.extrawarn | |
c6d30853 | 896 | include scripts/Makefile.ubsan |
a86fe353 | 897 | |
61754c18 MM |
898 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
899 | # last assignments | |
900 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
901 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
902 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 903 | |
89ff7131 MY |
904 | KBUILD_LDFLAGS_MODULE += --build-id |
905 | LDFLAGS_vmlinux += --build-id | |
18991197 | 906 | |
5d7d18f5 | 907 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 908 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
909 | endif |
910 | ||
14516765 LVO |
911 | # insure the checker run with the right endianness |
912 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
913 | ||
1f2f01b1 LVO |
914 | # the checker needs the correct machine size |
915 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
916 | ||
1da177e4 | 917 | # Default kernel image to build when no specific target is given. |
070b98bf | 918 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
919 | # set in the environment |
920 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
921 | # this default value | |
922 | export KBUILD_IMAGE ?= vmlinux | |
923 | ||
924 | # | |
925 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
926 | # images. Default is /boot, but you can set it to other values | |
927 | export INSTALL_PATH ?= /boot | |
928 | ||
f4d4ffc0 JC |
929 | # |
930 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
931 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
932 | # an argument if needed. Otherwise it defaults to the kernel install path | |
933 | # | |
934 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
935 | ||
1da177e4 LT |
936 | # |
937 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
938 | # relocations required by build roots. This is not defined in the | |
070b98bf | 939 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
940 | # |
941 | ||
df9df036 | 942 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
943 | export MODLIB |
944 | ||
ac031f26 | 945 | # |
3fbb43df MY |
946 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
947 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
948 | # the default option --strip-debug will be used. Otherwise, | |
949 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 950 | |
ac031f26 TT |
951 | ifdef INSTALL_MOD_STRIP |
952 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 953 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 954 | else |
2ea03891 | 955 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
956 | endif # INSTALL_MOD_STRIP=1 |
957 | else | |
2ea03891 | 958 | mod_strip_cmd = true |
ac031f26 TT |
959 | endif # INSTALL_MOD_STRIP |
960 | export mod_strip_cmd | |
961 | ||
beb50df3 BJ |
962 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
963 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
964 | # or CONFIG_MODULE_COMPRESS_XZ. | |
965 | ||
966 | mod_compress_cmd = true | |
967 | ifdef CONFIG_MODULE_COMPRESS | |
968 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 969 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
970 | endif # CONFIG_MODULE_COMPRESS_GZIP |
971 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 972 | mod_compress_cmd = xz -f |
beb50df3 BJ |
973 | endif # CONFIG_MODULE_COMPRESS_XZ |
974 | endif # CONFIG_MODULE_COMPRESS | |
975 | export mod_compress_cmd | |
976 | ||
d9d8d7ed | 977 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
978 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
979 | ||
980 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
981 | else |
982 | mod_sign_cmd = true | |
983 | endif | |
984 | export mod_sign_cmd | |
985 | ||
056d28d1 REB |
986 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
987 | ||
9f0c18ae JP |
988 | ifdef CONFIG_STACK_VALIDATION |
989 | has_libelf := $(call try-run,\ | |
056d28d1 | 990 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
9f0c18ae JP |
991 | ifeq ($(has_libelf),1) |
992 | objtool_target := tools/objtool FORCE | |
993 | else | |
9f0c18ae JP |
994 | SKIP_STACK_VALIDATION := 1 |
995 | export SKIP_STACK_VALIDATION | |
996 | endif | |
997 | endif | |
998 | ||
e00d8880 | 999 | PHONY += prepare0 |
e2a666d5 | 1000 | |
1da177e4 | 1001 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 1002 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
1003 | |
1004 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
1005 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 1006 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 | 1007 | |
1eaca4b9 MY |
1008 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
1009 | $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ | |
1010 | $(drivers-) $(net-) $(libs-) $(virt-)))) | |
1da177e4 | 1011 | |
f49821ee NP |
1012 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
1013 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1014 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1015 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 1016 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
1017 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
1018 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 1019 | |
1f2bfbd0 | 1020 | # Externally visible symbols (used by link-vmlinux.sh) |
d151e971 MY |
1021 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
1022 | $(drivers-y) $(net-y) $(virt-y) | |
3a166fc2 | 1023 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
95698570 | 1024 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1025 | export LDFLAGS_vmlinux |
312a3d09 | 1026 | # used by scripts/package/Makefile |
233c741d | 1027 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
9bb48247 | 1028 | |
d151e971 | 1029 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1030 | |
3fdc7d3f MY |
1031 | # Recurse until adjust_autoksyms.sh is satisfied |
1032 | PHONY += autoksyms_recursive | |
2441e78b | 1033 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
b7dca6dd | 1034 | autoksyms_recursive: $(vmlinux-deps) modules.order |
ba79d401 | 1035 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1036 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1037 | endif |
23121ca2 | 1038 | |
1f50b80a MY |
1039 | # For the kernel to actually contain only the needed exported symbols, |
1040 | # we have to build modules as well to determine what those symbols are. | |
1041 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1042 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1043 | KBUILD_MODULES := 1 | |
1044 | endif | |
1045 | ||
07a422bb MY |
1046 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1047 | ||
1048 | $(autoksyms_h): | |
1049 | $(Q)mkdir -p $(dir $@) | |
1050 | $(Q)touch $@ | |
23121ca2 | 1051 | |
fbe6e37d NP |
1052 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1053 | ||
1054 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 | 1055 | cmd_link-vmlinux = \ |
d503ac53 | 1056 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
fbe6e37d | 1057 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1058 | |
3fdc7d3f | 1059 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1f2bfbd0 | 1060 | +$(call if_changed,link-vmlinux) |
741f98fe | 1061 | |
392885ee MY |
1062 | targets := vmlinux |
1063 | ||
38385f8f | 1064 | # The actual objects are generated when descending, |
1da177e4 | 1065 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1066 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1067 | |
1068 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1069 | # Preset locale variables to speed up the build process. Limit locale | |
1070 | # tweaks to this spot to avoid wrong language settings when running | |
1071 | # make menuconfig etc. | |
1072 | # Error messages still appears in the original language | |
1073 | ||
4f193362 | 1074 | PHONY += $(vmlinux-dirs) |
059bc9fc | 1075 | $(vmlinux-dirs): prepare |
7e131918 | 1076 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 |
1da177e4 | 1077 | |
ba97df45 | 1078 | filechk_kernel.release = \ |
0d0e7718 | 1079 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
0d0e7718 | 1080 | |
83a35e36 | 1081 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1082 | include/config/kernel.release: FORCE |
0d0e7718 | 1083 | $(call filechk,kernel.release) |
cb58455c | 1084 | |
d8821622 MY |
1085 | # Additional helpers built in scripts/ |
1086 | # Carefully list dependencies so we do not try to build scripts twice | |
1087 | # in parallel | |
1088 | PHONY += scripts | |
60df1aee | 1089 | scripts: scripts_basic scripts_dtc |
d8821622 | 1090 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1091 | |
1da177e4 | 1092 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1093 | # or the modules are listed in "prepare". |
1094 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1095 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1096 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1097 | |
30527cef | 1098 | PHONY += prepare archprepare prepare3 |
5bb78269 | 1099 | |
86feeaa8 | 1100 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1101 | # and if so do: |
1102 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1103 | prepare3: include/config/kernel.release |
051f278e | 1104 | ifdef building_out_of_srctree |
fd54f502 | 1105 | @$(kecho) ' Using $(srctree) as source for kernel' |
a788b2ed MY |
1106 | $(Q)if [ -f $(srctree)/.config -o \ |
1107 | -d $(srctree)/include/config -o \ | |
1108 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
3a475b21 | 1109 | echo >&2 " $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \ |
5369f550 | 1110 | echo >&2 " in the '$(srctree)' directory.";\ |
1da177e4 LT |
1111 | /bin/false; \ |
1112 | fi; | |
1da177e4 LT |
1113 | endif |
1114 | ||
30527cef MY |
1115 | archprepare: archheaders archscripts scripts prepare3 outputmakefile \ |
1116 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h | |
5bb78269 | 1117 | |
65bba042 | 1118 | prepare0: archprepare |
60df1aee | 1119 | $(Q)$(MAKE) $(build)=scripts/mod |
8d36a623 | 1120 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1121 | |
1da177e4 | 1122 | # All the preparing.. |
b9ab5ebb JP |
1123 | prepare: prepare0 prepare-objtool |
1124 | ||
2c1f4f12 | 1125 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1126 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1127 | ||
2c1f4f12 MY |
1128 | PHONY += asm-generic uapi-asm-generic |
1129 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1130 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1131 | generic=include/asm-generic | |
2c1f4f12 | 1132 | uapi-asm-generic: |
037fc336 MY |
1133 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1134 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1135 | |
b9ab5ebb | 1136 | PHONY += prepare-objtool |
3b27a0c8 | 1137 | prepare-objtool: $(objtool_target) |
ef7cfd00 MY |
1138 | ifeq ($(SKIP_STACK_VALIDATION),1) |
1139 | ifdef CONFIG_UNWINDER_ORC | |
1140 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1141 | @false | |
1142 | else | |
1143 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1144 | endif | |
1145 | endif | |
1da177e4 | 1146 | |
1da177e4 LT |
1147 | # Generate some files |
1148 | # --------------------------------------------------------------------------- | |
1149 | ||
1150 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1151 | # needs to be updated, so this check is forced on all builds | |
1152 | ||
1153 | uts_len := 64 | |
63104eec SR |
1154 | define filechk_utsrelease.h |
1155 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1156 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1157 | exit 1; \ | |
1158 | fi; \ | |
ad774086 | 1159 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1160 | endef |
1da177e4 LT |
1161 | |
1162 | define filechk_version.h | |
ad774086 | 1163 | echo \#define LINUX_VERSION_CODE $(shell \ |
450c6076 | 1164 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
ad774086 | 1165 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
1da177e4 LT |
1166 | endef |
1167 | ||
43fee2b2 | 1168 | $(version_h): FORCE |
1da177e4 | 1169 | $(call filechk,version.h) |
223c24a7 | 1170 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1171 | |
273b281f | 1172 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1173 | $(call filechk,utsrelease.h) |
1174 | ||
179efcb4 VN |
1175 | PHONY += headerdep |
1176 | headerdep: | |
9663d989 PF |
1177 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1178 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1179 | |
8d730cfb DW |
1180 | # --------------------------------------------------------------------------- |
1181 | # Kernel headers | |
8d730cfb | 1182 | |
e6883b18 SR |
1183 | #Default location for installed headers |
1184 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1185 | |
59b2bd05 MY |
1186 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1187 | cmd_headers_install = \ | |
1188 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1189 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1190 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1191 | |
8d730cfb | 1192 | PHONY += headers_install |
59b2bd05 MY |
1193 | headers_install: headers |
1194 | $(call cmd,headers_install) | |
6520fe55 | 1195 | |
59b2bd05 | 1196 | PHONY += archheaders archscripts |
e6883b18 | 1197 | |
a5bae54c | 1198 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1199 | |
59b2bd05 MY |
1200 | PHONY += headers |
1201 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
9d022c54 | 1202 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1203 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
d5470d14 MY |
1204 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1205 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1206 | |
68475359 | 1207 | PHONY += headers_check |
59b2bd05 | 1208 | headers_check: headers |
d5470d14 MY |
1209 | $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 |
1210 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 | |
68475359 | 1211 | |
e949f4c2 | 1212 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1213 | prepare: headers |
e949f4c2 | 1214 | endif |
68475359 | 1215 | |
257edce6 MY |
1216 | ifdef CONFIG_HEADERS_CHECK |
1217 | all: headers_check | |
1218 | endif | |
1219 | ||
bdd7714b MY |
1220 | PHONY += scripts_unifdef |
1221 | scripts_unifdef: scripts_basic | |
1222 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1223 | ||
5a5da78b SK |
1224 | # --------------------------------------------------------------------------- |
1225 | # Kernel selftest | |
1226 | ||
1227 | PHONY += kselftest | |
1228 | kselftest: | |
2bc84526 | 1229 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1230 | |
801d2e9f | 1231 | PHONY += kselftest-clean |
dcb825a9 | 1232 | kselftest-clean: |
2bc84526 | 1233 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1234 | |
3d6dee7a BJZ |
1235 | PHONY += kselftest-merge |
1236 | kselftest-merge: | |
1237 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1238 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1239 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3d6dee7a BJZ |
1240 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
1241 | ||
37c8a5fa RH |
1242 | # --------------------------------------------------------------------------- |
1243 | # Devicetree files | |
1244 | ||
1245 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1246 | dtstree := arch/$(SRCARCH)/boot/dts | |
1247 | endif | |
1248 | ||
1249 | ifneq ($(dtstree),) | |
1250 | ||
1251 | %.dtb: prepare3 scripts_dtc | |
1252 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1253 | ||
4f0e3a57 RH |
1254 | PHONY += dtbs dtbs_install dt_binding_check |
1255 | dtbs dtbs_check: prepare3 scripts_dtc | |
37c8a5fa RH |
1256 | $(Q)$(MAKE) $(build)=$(dtstree) |
1257 | ||
4f0e3a57 RH |
1258 | dtbs_check: export CHECK_DTBS=1 |
1259 | dtbs_check: dt_binding_check | |
1260 | ||
37c8a5fa RH |
1261 | dtbs_install: |
1262 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1263 | ||
1264 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1265 | all: dtbs | |
1266 | endif | |
1267 | ||
1268 | endif | |
1269 | ||
1270 | PHONY += scripts_dtc | |
1271 | scripts_dtc: scripts_basic | |
1272 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1273 | ||
4f0e3a57 RH |
1274 | dt_binding_check: scripts_dtc |
1275 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1276 | ||
1da177e4 LT |
1277 | # --------------------------------------------------------------------------- |
1278 | # Modules | |
1279 | ||
1280 | ifdef CONFIG_MODULES | |
1281 | ||
070b98bf | 1282 | # By default, build modules as well |
1da177e4 | 1283 | |
73d1393e | 1284 | all: modules |
1da177e4 | 1285 | |
3fbb43df | 1286 | # Build modules |
551559e1 | 1287 | # |
3fbb43df MY |
1288 | # A module can be listed more than once in obj-m resulting in |
1289 | # duplicate lines in modules.order files. Those are removed | |
1290 | # using awk while concatenating to the final file. | |
1da177e4 | 1291 | |
4f193362 | 1292 | PHONY += modules |
68980b47 | 1293 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin |
fd54f502 | 1294 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1295 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
3a48a919 | 1296 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh |
1da177e4 | 1297 | |
68980b47 MY |
1298 | modules.order: $(vmlinux-dirs) |
1299 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ | |
1300 | ||
50ef0cdf | 1301 | modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs)) |
a6c36632 | 1302 | |
50ef0cdf MY |
1303 | modules.builtin: $(modbuiltin-dirs) |
1304 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ | |
a6c36632 | 1305 | |
50ef0cdf MY |
1306 | PHONY += $(modbuiltin-dirs) |
1307 | # tristate.conf is not included from this Makefile. Add it as a prerequisite | |
1308 | # here to make it self-healing in case somebody accidentally removes it. | |
1309 | $(modbuiltin-dirs): include/config/tristate.conf | |
1310 | $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) | |
1da177e4 LT |
1311 | |
1312 | # Target to prepare building external modules | |
4f193362 | 1313 | PHONY += modules_prepare |
059bc9fc | 1314 | modules_prepare: prepare |
1da177e4 LT |
1315 | |
1316 | # Target to install modules | |
4f193362 | 1317 | PHONY += modules_install |
1da177e4 LT |
1318 | modules_install: _modinst_ _modinst_post |
1319 | ||
4f193362 | 1320 | PHONY += _modinst_ |
2da30e70 | 1321 | _modinst_: |
1da177e4 LT |
1322 | @rm -rf $(MODLIB)/kernel |
1323 | @rm -f $(MODLIB)/source | |
1324 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1325 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1326 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1327 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1328 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1329 | fi |
1bd9a468 MY |
1330 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
1331 | @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin | |
898490c0 | 1332 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
b805aa0e | 1333 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1334 | |
50a8ec31 | 1335 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1336 | # boot a modules.dep even before / is mounted read-write. However the |
1337 | # boot script depmod is the master version. | |
4f193362 | 1338 | PHONY += _modinst_post |
6d128e1e | 1339 | _modinst_post: _modinst_ |
50a8ec31 | 1340 | $(call cmd,depmod) |
1da177e4 | 1341 | |
d890f510 JB |
1342 | ifeq ($(CONFIG_MODULE_SIG), y) |
1343 | PHONY += modules_sign | |
1344 | modules_sign: | |
1345 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1346 | endif | |
1347 | ||
1da177e4 LT |
1348 | else # CONFIG_MODULES |
1349 | ||
1350 | # Modules not configured | |
1351 | # --------------------------------------------------------------------------- | |
1352 | ||
612e47ce MY |
1353 | PHONY += modules modules_install |
1354 | modules modules_install: | |
5369f550 MM |
1355 | @echo >&2 |
1356 | @echo >&2 "The present kernel configuration has modules disabled." | |
1357 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1358 | @echo >&2 "Then build a kernel with module support enabled." | |
1359 | @echo >&2 | |
1da177e4 LT |
1360 | @exit 1 |
1361 | ||
1362 | endif # CONFIG_MODULES | |
1363 | ||
1da177e4 LT |
1364 | ### |
1365 | # Cleaning is done on three levels. | |
1366 | # make clean Delete most generated files | |
1367 | # Leave enough to build external modules | |
1368 | # make mrproper Delete the current configuration, and all generated files | |
1369 | # make distclean Remove editor backup files, patch leftover files and the like | |
1370 | ||
1371 | # Directories & files removed with 'make clean' | |
b7dca6dd | 1372 | CLEAN_DIRS += include/ksym |
898490c0 | 1373 | CLEAN_FILES += modules.builtin.modinfo |
1da177e4 LT |
1374 | |
1375 | # Directories & files removed with 'make mrproper' | |
d6fc9fcb | 1376 | MRPROPER_DIRS += include/config include/generated \ |
a788b2ed | 1377 | arch/$(SRCARCH)/include/generated .tmp_objdiff |
278ae604 | 1378 | MRPROPER_FILES += .config .config.old .version \ |
46457133 | 1379 | Module.symvers \ |
fb117949 DW |
1380 | signing_key.pem signing_key.priv signing_key.x509 \ |
1381 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1382 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 | 1383 | |
46457133 MY |
1384 | # Directories & files removed with 'make distclean' |
1385 | DISTCLEAN_DIRS += | |
1386 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS | |
1387 | ||
1da177e4 LT |
1388 | # clean - Delete most, but leave enough to build external modules |
1389 | # | |
1390 | clean: rm-dirs := $(CLEAN_DIRS) | |
1391 | clean: rm-files := $(CLEAN_FILES) | |
1eaca4b9 | 1392 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) |
1da177e4 | 1393 | |
bd1ee804 | 1394 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1395 | $(clean-dirs): |
1396 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1397 | ||
bd1ee804 PM |
1398 | vmlinuxclean: |
1399 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1400 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 PM |
1401 | |
1402 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1403 | |
1404 | # mrproper - Delete all generated files, including .config | |
1405 | # | |
1406 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1407 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
cb43fb57 | 1408 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1409 | |
b421b8a6 | 1410 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1411 | $(mrproper-dirs): |
1412 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1413 | ||
b421b8a6 | 1414 | mrproper: clean $(mrproper-dirs) |
1da177e4 LT |
1415 | $(call cmd,rmdirs) |
1416 | $(call cmd,rmfiles) | |
1417 | ||
1418 | # distclean | |
1419 | # | |
46457133 MY |
1420 | distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) |
1421 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) | |
1422 | ||
4f193362 | 1423 | PHONY += distclean |
1da177e4 LT |
1424 | |
1425 | distclean: mrproper | |
46457133 MY |
1426 | $(call cmd,rmdirs) |
1427 | $(call cmd,rmfiles) | |
1da177e4 | 1428 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
070b98bf | 1429 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1430 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1431 | -o -name 'core' \) \ | |
1da177e4 LT |
1432 | -type f -print | xargs rm -f |
1433 | ||
1434 | ||
1435 | # Packaging of the kernel to various formats | |
1436 | # --------------------------------------------------------------------------- | |
c79624c1 | 1437 | package-dir := scripts/package |
1da177e4 | 1438 | |
bafb6747 ACM |
1439 | %src-pkg: FORCE |
1440 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1441 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1442 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1443 | |
1444 | ||
1445 | # Brief documentation of the typical targets used | |
1446 | # --------------------------------------------------------------------------- | |
1447 | ||
5dffbe81 | 1448 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1449 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1450 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1451 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1452 | |
fe69b420 | 1453 | PHONY += help |
1da177e4 LT |
1454 | help: |
1455 | @echo 'Cleaning targets:' | |
5ea084ef | 1456 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1457 | @echo ' enough build support to build external modules' |
5ea084ef | 1458 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1459 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1460 | @echo '' |
1461 | @echo 'Configuration targets:' | |
1462 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1463 | @echo '' | |
1464 | @echo 'Other generic targets:' | |
1465 | @echo ' all - Build all targets marked with [*]' | |
1466 | @echo '* vmlinux - Build the bare kernel' | |
1467 | @echo '* modules - Build all modules' | |
9cc5d74c | 1468 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1469 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1470 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1471 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1472 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1473 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1474 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1475 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1476 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1477 | @echo ' tags/TAGS - Generate tags file for editors' |
1478 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1479 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1480 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1481 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1482 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1483 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1484 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1485 | echo '' |
31b8cc80 | 1486 | @echo 'Static analysers:' |
1da177e4 LT |
1487 | @echo ' checkstack - Generate a list of stack hogs' |
1488 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1489 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1490 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1491 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1492 | @echo ' headers_check - Sanity check on exported headers' |
74425eee | 1493 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1494 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1495 | @echo '' |
31b8cc80 | 1496 | @echo 'Kernel selftest:' |
5a5da78b SK |
1497 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1498 | @echo ' Build, install, and boot kernel before' | |
1499 | @echo ' running kselftest on it' | |
dcb825a9 | 1500 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1501 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1502 | @echo ' .config.' |
5a5da78b | 1503 | @echo '' |
37c8a5fa RH |
1504 | @$(if $(dtstree), \ |
1505 | echo 'Devicetree:'; \ | |
1506 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1507 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1508 | echo '') | |
1509 | ||
31b8cc80 RD |
1510 | @echo 'Userspace tools targets:' |
1511 | @echo ' use "make tools/help"' | |
1512 | @echo ' or "cd tools; make help"' | |
1513 | @echo '' | |
1da177e4 | 1514 | @echo 'Kernel packaging:' |
6c2133e1 | 1515 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1516 | @echo '' |
1517 | @echo 'Documentation targets:' | |
cb43fb57 | 1518 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1519 | @echo '' |
01dee188 | 1520 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1521 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1522 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1523 | @echo '' |
1524 | @$(if $(boards), \ | |
1525 | $(foreach b, $(boards), \ | |
1526 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1527 | echo '') | |
5dffbe81 SB |
1528 | @$(if $(board-dirs), \ |
1529 | $(foreach b, $(board-dirs), \ | |
1530 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1531 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1532 | echo '') | |
1da177e4 LT |
1533 | |
1534 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1535 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1536 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1537 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1538 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1539 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1540 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1541 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1542 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1543 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1544 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1545 | @echo '' |
1546 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1547 | @echo 'For further info see the ./README file' | |
1548 | ||
1549 | ||
5dffbe81 SB |
1550 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1551 | ||
1552 | help-boards: $(help-board-dirs) | |
1553 | ||
fbae4d58 | 1554 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1555 | |
1556 | $(help-board-dirs): help-%: | |
1557 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1558 | @$(if $(boards-per-dir), \ | |
1559 | $(foreach b, $(boards-per-dir), \ | |
1560 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1561 | echo '') | |
1562 | ||
1563 | ||
1da177e4 LT |
1564 | # Documentation targets |
1565 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1566 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1567 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1568 | PHONY += $(DOC_TARGETS) |
1569 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1570 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1571 | |
67274c08 MY |
1572 | # Misc |
1573 | # --------------------------------------------------------------------------- | |
1574 | ||
1575 | PHONY += scripts_gdb | |
7a739ce5 | 1576 | scripts_gdb: prepare0 |
1e5ff84f | 1577 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1578 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1579 | |
1580 | ifdef CONFIG_GDB_SCRIPTS | |
1581 | all: scripts_gdb | |
1582 | endif | |
1583 | ||
1da177e4 LT |
1584 | else # KBUILD_EXTMOD |
1585 | ||
1586 | ### | |
1587 | # External module support. | |
1588 | # When building external modules the kernel used as basis is considered | |
1589 | # read-only, and no consistency checks are made and the make | |
1590 | # system is not used on the basis kernel. If updates are required | |
1591 | # in the basis kernel ordinary make commands (without M=...) must | |
1592 | # be used. | |
1593 | # | |
1594 | # The following are the only valid targets when building external | |
1595 | # modules. | |
1596 | # make M=dir clean Delete all automatically generated files | |
1597 | # make M=dir modules Make all modules in specified dir | |
1598 | # make M=dir Same as 'make M=dir modules' | |
1599 | # make M=dir modules_install | |
070b98bf | 1600 | # Install the modules built in the module directory |
1da177e4 LT |
1601 | # Assumes install directory is already created |
1602 | ||
1603 | # We are always building modules | |
1604 | KBUILD_MODULES := 1 | |
1da177e4 | 1605 | |
4f193362 | 1606 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1607 | $(objtree)/Module.symvers: |
1608 | @test -e $(objtree)/Module.symvers || ( \ | |
1609 | echo; \ | |
1610 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1611 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1612 | echo ) | |
1613 | ||
1614 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1615 | PHONY += $(module-dirs) modules |
e07db28e | 1616 | $(module-dirs): prepare $(objtree)/Module.symvers |
7e131918 | 1617 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) need-modorder=1 |
1da177e4 LT |
1618 | |
1619 | modules: $(module-dirs) | |
fd54f502 | 1620 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1621 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1622 | |
4f193362 | 1623 | PHONY += modules_install |
a67dc21a | 1624 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1625 | |
4f193362 PS |
1626 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1627 | PHONY += _emodinst_ | |
a67dc21a | 1628 | _emodinst_: |
a67dc21a | 1629 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1630 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1631 | |
4f193362 | 1632 | PHONY += _emodinst_post |
a67dc21a SR |
1633 | _emodinst_post: _emodinst_ |
1634 | $(call cmd,depmod) | |
1635 | ||
1da177e4 LT |
1636 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1637 | ||
4f193362 | 1638 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1639 | $(clean-dirs): |
1640 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1641 | ||
88d7be03 | 1642 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1643 | |
fe69b420 | 1644 | PHONY += help |
1da177e4 LT |
1645 | help: |
1646 | @echo ' Building external modules.' | |
1647 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1648 | @echo '' | |
1649 | @echo ' modules - default target, build the module(s)' | |
1650 | @echo ' modules_install - install the module' | |
1651 | @echo ' clean - remove generated files in module directory only' | |
1652 | @echo '' | |
06300b21 | 1653 | |
059bc9fc | 1654 | PHONY += prepare |
1da177e4 LT |
1655 | endif # KBUILD_EXTMOD |
1656 | ||
88d7be03 MM |
1657 | clean: $(clean-dirs) |
1658 | $(call cmd,rmdirs) | |
1659 | $(call cmd,rmfiles) | |
43f67c98 | 1660 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1661 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 RH |
1662 | -o -name '*.ko.*' \ |
1663 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
ef46d9b3 | 1664 | -o -name '*.dwo' -o -name '*.lst' \ |
b7dca6dd | 1665 | -o -name '*.su' -o -name '*.mod' \ |
88d7be03 | 1666 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1667 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1668 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1669 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1670 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1671 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1672 | -o -name '*.ll' \ |
88d7be03 MM |
1673 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1674 | ||
1da177e4 LT |
1675 | # Generate tags for editors |
1676 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1677 | quiet_cmd_tags = GEN $@ |
1678 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1679 | |
f4ed1009 | 1680 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1681 | $(call cmd,tags) |
1682 | ||
1da177e4 LT |
1683 | # Scripts to check various things for consistency |
1684 | # --------------------------------------------------------------------------- | |
1685 | ||
279f3dd3 PF |
1686 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1687 | ||
1da177e4 | 1688 | includecheck: |
436f876c | 1689 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1690 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1691 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1692 | |
1693 | versioncheck: | |
2ee2d292 | 1694 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1695 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1696 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1697 | |
74425eee NP |
1698 | coccicheck: |
1699 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1700 | ||
1da177e4 LT |
1701 | namespacecheck: |
1702 | $(PERL) $(srctree)/scripts/namespace.pl | |
1703 | ||
295ac051 AB |
1704 | export_report: |
1705 | $(PERL) $(srctree)/scripts/export_report.pl | |
1706 | ||
c398ff00 | 1707 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1708 | |
011e3a9a JD |
1709 | # UML needs a little special treatment here. It wants to use the host |
1710 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1711 | # else wants $(ARCH), including people doing cross-builds, which means | |
1712 | # that $(SUBARCH) doesn't work here. | |
1713 | ifeq ($(ARCH), um) | |
1714 | CHECKSTACK_ARCH := $(SUBARCH) | |
1715 | else | |
1716 | CHECKSTACK_ARCH := $(ARCH) | |
1717 | endif | |
1da177e4 LT |
1718 | checkstack: |
1719 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 1720 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1721 | |
7b8ea53d AW |
1722 | kernelrelease: |
1723 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1724 | |
cb58455c | 1725 | kernelversion: |
2244cbd8 | 1726 | @echo $(KERNELVERSION) |
1da177e4 | 1727 | |
c398ff00 MM |
1728 | image_name: |
1729 | @echo $(KBUILD_IMAGE) | |
1730 | ||
ea01fa9f | 1731 | # Clear a bunch of variables before executing the submake |
f47a23ce MY |
1732 | |
1733 | ifeq ($(quiet),silent_) | |
1734 | tools_silent=s | |
1735 | endif | |
1736 | ||
ea01fa9f | 1737 | tools/: FORCE |
bf35182f | 1738 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1739 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
ea01fa9f BP |
1740 | |
1741 | tools/%: FORCE | |
bf35182f | 1742 | $(Q)mkdir -p $(objtree)/tools |
75dd4747 | 1743 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
ea01fa9f | 1744 | |
06300b21 SR |
1745 | # Single targets |
1746 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1747 | # Single targets are compatible with: |
e1b8513d | 1748 | # - build with mixed source and output |
bc2546a6 SR |
1749 | # - build with separate output dir 'make O=...' |
1750 | # - external modules | |
1751 | # | |
1752 | # target-dir => where to store outputfile | |
1753 | # build-dir => directory in kernel source tree to use | |
1754 | ||
6b12de69 MY |
1755 | build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ |
1756 | build-dir = $(patsubst %/,%,$(dir $(build-target))) | |
1757 | ||
1758 | %.i: prepare FORCE | |
1759 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1760 | %.ll: prepare FORCE | |
1761 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1762 | %.lst: prepare FORCE | |
1763 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1764 | %.o: prepare FORCE | |
1765 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1766 | %.s: prepare FORCE | |
1767 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1768 | %.symtypes: prepare FORCE | |
1769 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
06300b21 | 1770 | |
bc2546a6 | 1771 | # Modules |
6d3c94e4 MY |
1772 | PHONY += / |
1773 | /: ./ | |
1774 | ||
059bc9fc | 1775 | %/: prepare FORCE |
648ad9b1 | 1776 | $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) |
06300b21 | 1777 | |
38385f8f | 1778 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1779 | # =========================================================================== |
1780 | ||
1781 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1782 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1783 | ||
1784 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1785 | cmd_rmfiles = rm -f $(rm-files) | |
1786 | ||
bc3c26fe | 1787 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1788 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1789 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1790 | $(KERNELRELEASE) |
50a8ec31 | 1791 | |
392885ee MY |
1792 | # read saved command lines for existing targets |
1793 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 1794 | |
b999923c | 1795 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 1796 | |
25815cf5 MY |
1797 | endif # ifeq ($(config-targets),1) |
1798 | endif # ifeq ($(mixed-targets),1) | |
688931a5 | 1799 | endif # need-sub-make |
1da177e4 | 1800 | |
4f193362 | 1801 | PHONY += FORCE |
1da177e4 | 1802 | FORCE: |
4f193362 | 1803 | |
bd412d81 | 1804 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 1805 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1806 | .PHONY: $(PHONY) |