]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
c517d838 | 2 | VERSION = 4 |
60cc43fc | 3 | PATCHLEVEL = 17 |
55922c9d | 4 | SUBLEVEL = 0 |
29dcea88 | 5 | EXTRAVERSION = |
75bc37fe | 6 | NAME = Merciless Moray |
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 | ||
a436bb7b MY |
18 | # o Do not use make's built-in rules and variables |
19 | # (this increases performance and avoids hard-to-debug behaviour); | |
20 | # o Look for make include files relative to root of kernel src | |
21 | MAKEFLAGS += -rR --include-dir=$(CURDIR) | |
1da177e4 | 22 | |
c051346b | 23 | # Avoid funny character set dependencies |
06b5dc64 | 24 | unexport LC_ALL |
c051346b PA |
25 | LC_COLLATE=C |
26 | LC_NUMERIC=C | |
07105202 | 27 | export LC_COLLATE LC_NUMERIC |
c051346b | 28 | |
ab7474ea BP |
29 | # Avoid interference with shell env settings |
30 | unexport GREP_OPTIONS | |
31 | ||
1da177e4 LT |
32 | # We are using a recursive build, so we need to do a little thinking |
33 | # to get the ordering right. | |
34 | # | |
35 | # Most importantly: sub-Makefiles should only ever modify files in | |
36 | # their own directory. If in some directory we have a dependency on | |
37 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 38 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
39 | # turn into vmlinux), we will call a sub make in that other dir, and |
40 | # after that we are sure that everything which is in that other dir | |
41 | # is now up to date. | |
42 | # | |
43 | # The only cases where we need to modify files which have global | |
44 | # effects are thus separated out and done before the recursive | |
45 | # descending is started. They are now explicitly listed as the | |
46 | # prepare rule. | |
47 | ||
066b7ed9 MM |
48 | # Beautify output |
49 | # --------------------------------------------------------------------------- | |
50 | # | |
51 | # Normally, we echo the whole command before executing it. By making | |
52 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
53 | # $(quiet) to choose other forms of output instead, e.g. | |
54 | # | |
55 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
56 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
57 | # | |
58 | # If $(quiet) is empty, the whole command will be printed. | |
59 | # If it is set to "quiet_", only the short version will be printed. | |
60 | # If it is set to "silent_", nothing will be printed at all, since | |
61 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
62 | # | |
63 | # A simple variant is to prefix commands with $(Q) - that's useful | |
64 | # for commands that shall be hidden in non-verbose mode. | |
65 | # | |
66 | # $(Q)ln $@ :< | |
67 | # | |
68 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
69 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
70 | # | |
1da177e4 LT |
71 | # To put more focus on warnings, be less verbose as default |
72 | # Use 'make V=1' to see the full commands | |
73 | ||
b8b0618c CR |
74 | ifeq ("$(origin V)", "command line") |
75 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
76 | endif |
77 | ifndef KBUILD_VERBOSE | |
78 | KBUILD_VERBOSE = 0 | |
79 | endif | |
80 | ||
066b7ed9 MM |
81 | ifeq ($(KBUILD_VERBOSE),1) |
82 | quiet = | |
83 | Q = | |
84 | else | |
85 | quiet=quiet_ | |
86 | Q = @ | |
87 | endif | |
88 | ||
89 | # If the user is running make -s (silent mode), suppress echoing of | |
90 | # commands | |
91 | ||
6f0fa58e | 92 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
066b7ed9 | 93 | quiet=silent_ |
e572d088 | 94 | tools_silent=s |
066b7ed9 | 95 | endif |
066b7ed9 MM |
96 | |
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
1da177e4 LT |
99 | # kbuild supports saving output files in a separate directory. |
100 | # To locate output files in a separate directory two syntaxes are supported. | |
101 | # In both cases the working directory must be the root of the kernel src. | |
102 | # 1) O= | |
103 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 104 | # |
1da177e4 LT |
105 | # 2) Set KBUILD_OUTPUT |
106 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
107 | # where the output files shall be placed. | |
108 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
109 | # make | |
110 | # | |
111 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
112 | # variable. | |
113 | ||
c4e6fff1 C |
114 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
115 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
1da177e4 LT |
116 | ifeq ($(KBUILD_SRC),) |
117 | ||
118 | # OK, Make called in directory where kernel src resides | |
119 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
120 | ifeq ("$(origin O)", "command line") |
121 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
122 | endif |
123 | ||
1cacc9ab SR |
124 | # Cancel implicit rules on top Makefile |
125 | $(CURDIR)/Makefile Makefile: ; | |
126 | ||
51193b76 RJ |
127 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
128 | $(error main directory cannot contain spaces nor colons) | |
129 | endif | |
130 | ||
1da177e4 | 131 | ifneq ($(KBUILD_OUTPUT),) |
1da177e4 LT |
132 | # check that the output directory actually exists |
133 | saved-output := $(KBUILD_OUTPUT) | |
028568d8 | 134 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
16f8259c | 135 | && pwd) |
1da177e4 | 136 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 137 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 138 | |
0b35786d MM |
139 | PHONY += $(MAKECMDGOALS) sub-make |
140 | ||
1cacc9ab | 141 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 142 | @: |
0b35786d | 143 | |
c4e6fff1 | 144 | # Invoke a second make in the output directory, passing relevant variables |
2e8d696b | 145 | sub-make: |
745a2543 | 146 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
aa55c8e2 | 147 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 LT |
148 | |
149 | # Leave processing to above invocation of make | |
150 | skip-makefile := 1 | |
151 | endif # ifneq ($(KBUILD_OUTPUT),) | |
152 | endif # ifeq ($(KBUILD_SRC),) | |
153 | ||
154 | # We process the rest of the Makefile if this is the final invocation of make | |
155 | ifeq ($(skip-makefile),) | |
156 | ||
7ff52571 MY |
157 | # Do not print "Entering directory ...", |
158 | # but we want to display it when entering to the output directory | |
159 | # so that IDEs/editors are able to understand relative filenames. | |
160 | MAKEFLAGS += --no-print-directory | |
161 | ||
aa55c8e2 MY |
162 | # Call a source code checker (by default, "sparse") as part of the |
163 | # C compilation. | |
164 | # | |
165 | # Use 'make C=1' to enable checking of only re-compiled files. | |
166 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
167 | # of whether they are re-compiled or not. | |
168 | # | |
036db11c C |
169 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
170 | # including where to get the "sparse" utility. | |
aa55c8e2 MY |
171 | |
172 | ifeq ("$(origin C)", "command line") | |
173 | KBUILD_CHECKSRC = $(C) | |
174 | endif | |
175 | ifndef KBUILD_CHECKSRC | |
176 | KBUILD_CHECKSRC = 0 | |
177 | endif | |
178 | ||
179 | # Use make M=dir to specify directory of external module to build | |
180 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
181 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
182 | ifdef SUBDIRS | |
183 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
184 | endif | |
185 | ||
186 | ifeq ("$(origin M)", "command line") | |
187 | KBUILD_EXTMOD := $(M) | |
188 | endif | |
189 | ||
9da0763b MM |
190 | ifeq ($(KBUILD_SRC),) |
191 | # building in the source tree | |
192 | srctree := . | |
193 | else | |
194 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
195 | # building in a subdirectory of the source tree | |
196 | srctree := .. | |
197 | else | |
198 | srctree := $(KBUILD_SRC) | |
199 | endif | |
200 | endif | |
2c1f4f12 MY |
201 | |
202 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
203 | ||
7e1c0477 | 204 | objtree := . |
1da177e4 LT |
205 | src := $(srctree) |
206 | obj := $(objtree) | |
207 | ||
0f558c33 | 208 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 | 209 | |
11294235 | 210 | export srctree objtree VPATH |
1da177e4 | 211 | |
2c1f4f12 MY |
212 | # To make sure we do not include .config for any of the *config targets |
213 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
214 | # It is allowed to specify more targets when calling make, including | |
215 | # mixing *config targets and build targets. | |
216 | # For example 'make oldconfig all'. | |
217 | # Detect when mixed targets is specified, and make a second invocation | |
218 | # of make so .config is not included in this case either (for *config). | |
219 | ||
220 | version_h := include/generated/uapi/linux/version.h | |
221 | old_version_h := include/linux/version.h | |
222 | ||
22340a06 MY |
223 | clean-targets := %clean mrproper cleandocs |
224 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 MY |
225 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
226 | $(version_h) headers_% archheaders archscripts \ | |
227 | kernelversion %src-pkg | |
228 | ||
229 | config-targets := 0 | |
230 | mixed-targets := 0 | |
231 | dot-config := 1 | |
232 | ||
233 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
234 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
235 | dot-config := 0 | |
236 | endif | |
237 | endif | |
238 | ||
239 | ifeq ($(KBUILD_EXTMOD),) | |
240 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
241 | config-targets := 1 | |
242 | ifneq ($(words $(MAKECMDGOALS)),1) | |
243 | mixed-targets := 1 | |
244 | endif | |
245 | endif | |
246 | endif | |
22340a06 MY |
247 | |
248 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
249 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
250 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
251 | mixed-targets := 1 | |
252 | endif | |
253 | endif | |
254 | ||
2c1f4f12 MY |
255 | # install and modules_install need also be processed one by one |
256 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
257 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
258 | mixed-targets := 1 | |
259 | endif | |
260 | endif | |
261 | ||
262 | ifeq ($(mixed-targets),1) | |
263 | # =========================================================================== | |
264 | # We're called with mixed targets (*config and build targets). | |
265 | # Handle them one by one. | |
266 | ||
267 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
268 | ||
269 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
270 | @: | |
271 | ||
272 | __build_one_by_one: | |
273 | $(Q)set -e; \ | |
274 | for i in $(MAKECMDGOALS); do \ | |
275 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
276 | done | |
277 | ||
278 | else | |
279 | ||
280 | # We need some generic definitions (do not try to remake the file). | |
281 | scripts/Kbuild.include: ; | |
282 | include scripts/Kbuild.include | |
283 | ||
284 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
285 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
286 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
287 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
288 | ||
1da177e4 LT |
289 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
290 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
291 | # line overrides the setting of ARCH below. If a native build is happening, | |
38385f8f | 292 | # then ARCH is assigned, getting whatever value it gets normally, and |
1da177e4 LT |
293 | # SUBARCH is subsequently ignored. |
294 | ||
ffee0de4 DW |
295 | SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ |
296 | -e s/sun4u/sparc64/ \ | |
1da177e4 | 297 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
39990b5e | 298 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
236b1957 | 299 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
fbe934d6 PD |
300 | -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ |
301 | -e s/riscv.*/riscv/) | |
1da177e4 LT |
302 | |
303 | # Cross compiling and selecting different set of gcc/bin-utils | |
304 | # --------------------------------------------------------------------------- | |
305 | # | |
306 | # When performing cross compilation for other architectures ARCH shall be set | |
307 | # to the target architecture. (See arch/* for the possibilities). | |
308 | # ARCH can be set during invocation of make: | |
309 | # make ARCH=ia64 | |
310 | # Another way is to have ARCH set in the environment. | |
311 | # The default ARCH is the host where make is executed. | |
312 | ||
313 | # CROSS_COMPILE specify the prefix used for all executables used | |
314 | # during compilation. Only gcc and related bin-utils executables | |
315 | # are prefixed with $(CROSS_COMPILE). | |
316 | # CROSS_COMPILE can be set on the command line | |
317 | # make CROSS_COMPILE=ia64-linux- | |
318 | # Alternatively CROSS_COMPILE can be set in the environment. | |
319 | # Default value for CROSS_COMPILE is not to prefix executables | |
320 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 321 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
322 | |
323 | # Architecture as present in compile.h | |
6752ed90 TG |
324 | UTS_MACHINE := $(ARCH) |
325 | SRCARCH := $(ARCH) | |
1da177e4 | 326 | |
d746d647 SR |
327 | # Additional ARCH settings for x86 |
328 | ifeq ($(ARCH),i386) | |
329 | SRCARCH := x86 | |
330 | endif | |
331 | ifeq ($(ARCH),x86_64) | |
332 | SRCARCH := x86 | |
333 | endif | |
74b469f2 | 334 | |
5e538790 | 335 | # Additional ARCH settings for sparc |
e69f58c0 NK |
336 | ifeq ($(ARCH),sparc32) |
337 | SRCARCH := sparc | |
338 | endif | |
a439fe51 | 339 | ifeq ($(ARCH),sparc64) |
5e538790 | 340 | SRCARCH := sparc |
a439fe51 | 341 | endif |
2fb9b1bd | 342 | |
3cc000b5 PM |
343 | # Additional ARCH settings for sh |
344 | ifeq ($(ARCH),sh64) | |
345 | SRCARCH := sh | |
346 | endif | |
347 | ||
14cdd3c4 | 348 | KCONFIG_CONFIG ?= .config |
41263fc6 | 349 | export KCONFIG_CONFIG |
14cdd3c4 | 350 | |
1da177e4 LT |
351 | # SHELL used by kbuild |
352 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
353 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
354 | else echo sh; fi ; fi) | |
355 | ||
d7f14c66 UKK |
356 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS) |
357 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS) | |
358 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS) | |
359 | ||
070b98bf SR |
360 | HOSTCC = gcc |
361 | HOSTCXX = g++ | |
d7f14c66 UKK |
362 | HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
363 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) | |
364 | HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) | |
365 | HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) | |
366 | HOST_LOADLIBES := $(HOST_LFS_LIBS) | |
1da177e4 | 367 | |
1da177e4 | 368 | # Make variables (CC, etc...) |
1da177e4 LT |
369 | AS = $(CROSS_COMPILE)as |
370 | LD = $(CROSS_COMPILE)ld | |
371 | CC = $(CROSS_COMPILE)gcc | |
372 | CPP = $(CC) -E | |
373 | AR = $(CROSS_COMPILE)ar | |
374 | NM = $(CROSS_COMPILE)nm | |
375 | STRIP = $(CROSS_COMPILE)strip | |
376 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
377 | OBJDUMP = $(CROSS_COMPILE)objdump | |
73a4f6db MY |
378 | LEX = flex |
379 | YACC = bison | |
1da177e4 LT |
380 | AWK = awk |
381 | GENKSYMS = scripts/genksyms/genksyms | |
caa27b66 | 382 | INSTALLKERNEL := installkernel |
1da177e4 | 383 | DEPMOD = /sbin/depmod |
1da177e4 | 384 | PERL = perl |
011bf125 | 385 | PYTHON = python |
e9781b52 MY |
386 | PYTHON2 = python2 |
387 | PYTHON3 = python3 | |
1da177e4 LT |
388 | CHECK = sparse |
389 | ||
80a7d1d9 | 390 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 391 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
b36fad65 | 392 | NOSTDINC_FLAGS = |
6588169d SR |
393 | CFLAGS_MODULE = |
394 | AFLAGS_MODULE = | |
395 | LDFLAGS_MODULE = | |
1da177e4 LT |
396 | CFLAGS_KERNEL = |
397 | AFLAGS_KERNEL = | |
b36fad65 | 398 | LDFLAGS_vmlinux = |
1da177e4 | 399 | |
abbf1590 DH |
400 | # Use USERINCLUDE when you must reference the UAPI directories only. |
401 | USERINCLUDE := \ | |
9d022c54 MY |
402 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
403 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 404 | -I$(srctree)/include/uapi \ |
3308b285 | 405 | -I$(objtree)/include/generated/uapi \ |
abbf1590 DH |
406 | -include $(srctree)/include/linux/kconfig.h |
407 | ||
1da177e4 LT |
408 | # Use LINUXINCLUDE when you must reference the include/ directory. |
409 | # Needed to be compatible with the O= option | |
abbf1590 | 410 | LINUXINCLUDE := \ |
9d022c54 MY |
411 | -I$(srctree)/arch/$(SRCARCH)/include \ |
412 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
abbf1590 | 413 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
f8224f7f MY |
414 | -I$(objtree)/include \ |
415 | $(USERINCLUDE) | |
1da177e4 | 416 | |
433dc2eb | 417 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
a0f97e06 | 418 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
8c97023c | 419 | -fno-strict-aliasing -fno-common -fshort-wchar \ |
a8735821 | 420 | -Werror-implicit-function-declaration \ |
51b97e35 | 421 | -Wno-format-security \ |
433dc2eb MY |
422 | -std=gnu89 |
423 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
80c00ba9 SR |
424 | KBUILD_AFLAGS_KERNEL := |
425 | KBUILD_CFLAGS_KERNEL := | |
6588169d SR |
426 | KBUILD_AFLAGS_MODULE := -DMODULE |
427 | KBUILD_CFLAGS_MODULE := -DMODULE | |
428 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
ce99d0bf | 429 | LDFLAGS := |
433dc2eb | 430 | GCC_PLUGINS_CFLAGS := |
1da177e4 | 431 | |
80ef88d6 | 432 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
d7f14c66 | 433 | export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES |
e9781b52 | 434 | export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
070b98bf | 435 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 436 | |
06c5040c | 437 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
0e410e15 AK |
438 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
439 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
222d394d | 440 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 441 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 442 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 443 | export KBUILD_ARFLAGS |
1da177e4 | 444 | |
21c54b77 MY |
445 | export CC_VERSION_TEXT := $(shell $(CC) --version | head -n 1) |
446 | ||
1da177e4 LT |
447 | # When compiling out-of-tree modules, put MODVERDIR in the module |
448 | # tree rather than in the kernel tree. The kernel tree might | |
449 | # even be read-only. | |
450 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
451 | ||
1da177e4 LT |
452 | # Files to ignore in find ... statements |
453 | ||
ae63b2d7 PB |
454 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
455 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
456 | -prune -o | |
450c6076 JJ |
457 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
458 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
459 | |
460 | # =========================================================================== | |
461 | # Rules shared between *config targets and build targets | |
462 | ||
312a3d09 | 463 | # Basic helpers built in scripts/basic/ |
4f193362 | 464 | PHONY += scripts_basic |
1da177e4 LT |
465 | scripts_basic: |
466 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 467 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 468 | |
cd05e6bd JB |
469 | # To avoid any implicit rule to kick in, define an empty command. |
470 | scripts/basic/%: scripts_basic ; | |
471 | ||
4f193362 | 472 | PHONY += outputmakefile |
fd5f0cd6 JB |
473 | # outputmakefile generates a Makefile in the output directory, if using a |
474 | # separate output directory. This allows convenient use of make in the | |
475 | # output directory. | |
1da177e4 | 476 | outputmakefile: |
fd5f0cd6 | 477 | ifneq ($(KBUILD_SRC),) |
92979997 | 478 | $(Q)ln -fsn $(srctree) source |
fd5f0cd6 JB |
479 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
480 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
481 | endif | |
1da177e4 | 482 | |
ae6b289a CF |
483 | ifeq ($(cc-name),clang) |
484 | ifneq ($(CROSS_COMPILE),) | |
485 | CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) | |
486 | GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) | |
487 | endif | |
488 | ifneq ($(GCC_TOOLCHAIN),) | |
489 | CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) | |
490 | endif | |
491 | KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) | |
492 | KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) | |
0f0e8de3 SA |
493 | KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) |
494 | KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) | |
ae6b289a CF |
495 | endif |
496 | ||
d5028ba8 PZ |
497 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
498 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
499 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
500 | export RETPOLINE_CFLAGS | |
501 | ||
8438ee76 MK |
502 | KBUILD_CFLAGS += $(call cc-option,-fno-PIE) |
503 | KBUILD_AFLAGS += $(call cc-option,-fno-PIE) | |
504 | ||
e501ce95 | 505 | # check for 'asm goto' |
e08d6de4 | 506 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) |
e501ce95 PZ |
507 | CC_HAVE_ASM_GOTO := 1 |
508 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
509 | KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO | |
510 | endif | |
511 | ||
1c8c5a9d | 512 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/cc-can-link.sh $(CC)), y) |
819dd92b AS |
513 | CC_CAN_LINK := y |
514 | export CC_CAN_LINK | |
515 | endif | |
516 | ||
1da177e4 LT |
517 | ifeq ($(config-targets),1) |
518 | # =========================================================================== | |
519 | # *config targets only - make sure prerequisites are updated, and descend | |
520 | # in scripts/kconfig to make the *config target | |
521 | ||
522 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
523 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
524 | # used for 'make defconfig' | |
a436bb7b | 525 | include arch/$(SRCARCH)/Makefile |
61bee204 | 526 | export KBUILD_DEFCONFIG KBUILD_KCONFIG |
1da177e4 | 527 | |
31110ebb | 528 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
529 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
530 | ||
531 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
532 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
533 | ||
534 | else | |
535 | # =========================================================================== | |
536 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
537 | # targets and others. In general all targets except *config targets. | |
538 | ||
2c1f4f12 MY |
539 | # If building an external module we do not care about the all: rule |
540 | # but instead _all depend on modules | |
541 | PHONY += all | |
542 | ifeq ($(KBUILD_EXTMOD),) | |
543 | _all: all | |
544 | else | |
545 | _all: modules | |
546 | endif | |
547 | ||
548 | # Decide whether to build built-in, modular, or both. | |
549 | # Normally, just do built-in. | |
550 | ||
551 | KBUILD_MODULES := | |
552 | KBUILD_BUILTIN := 1 | |
553 | ||
554 | # If we have only "make modules", don't compile built-in objects. | |
555 | # When we're building modules with modversions, we need to consider | |
556 | # the built-in objects during the descend as well, in order to | |
557 | # make sure the checksums are up to date before we record them. | |
558 | ||
559 | ifeq ($(MAKECMDGOALS),modules) | |
560 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
561 | endif | |
562 | ||
563 | # If we have "make <whatever> modules", compile modules | |
564 | # in addition to whatever we do anyway. | |
565 | # Just "make" or "make all" shall build modules as well | |
566 | ||
567 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
568 | KBUILD_MODULES := 1 | |
569 | endif | |
570 | ||
571 | ifeq ($(MAKECMDGOALS),) | |
572 | KBUILD_MODULES := 1 | |
573 | endif | |
574 | ||
575 | export KBUILD_MODULES KBUILD_BUILTIN | |
576 | ||
1da177e4 | 577 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
578 | # Objects we will link into vmlinux / subdirs we need to visit |
579 | init-y := init/ | |
df85b2d7 | 580 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
581 | net-y := net/ |
582 | libs-y := lib/ | |
583 | core-y := usr/ | |
37d9fe47 | 584 | virt-y := virt/ |
1da177e4 LT |
585 | endif # KBUILD_EXTMOD |
586 | ||
587 | ifeq ($(dot-config),1) | |
9ee4e336 SR |
588 | # Read in config |
589 | -include include/config/auto.conf | |
1da177e4 | 590 | |
9ee4e336 | 591 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
592 | # Read in dependencies to all Kconfig* files, make sure to run |
593 | # oldconfig if changes are detected. | |
c955ccaf | 594 | -include include/config/auto.conf.cmd |
1da177e4 | 595 | |
1da177e4 | 596 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 597 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 598 | |
61277981 UM |
599 | # The actual configuration files used during the build are stored in |
600 | # include/generated/ and include/config/. Update them if .config is newer than | |
601 | # include/config/auto.conf (which mirrors .config). | |
bc081dd6 | 602 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
911a91c3 | 603 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
3041e47e | 604 | else |
264a2683 | 605 | # external modules needs include/generated/autoconf.h and include/config/auto.conf |
9ee4e336 SR |
606 | # but do not care if they are up-to-date. Use auto.conf to trigger the test |
607 | PHONY += include/config/auto.conf | |
608 | ||
609 | include/config/auto.conf: | |
264a2683 | 610 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
611 | echo >&2; \ |
612 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
613 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
614 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
615 | echo >&2 ; \ | |
9ee4e336 SR |
616 | /bin/false) |
617 | ||
618 | endif # KBUILD_EXTMOD | |
c955ccaf | 619 | |
1da177e4 LT |
620 | else |
621 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 622 | include/config/auto.conf: ; |
9ee4e336 | 623 | endif # $(dot-config) |
1da177e4 LT |
624 | |
625 | # The all: target is the default when no target is given on the | |
626 | # command line. | |
627 | # This allow a user to issue only 'make' to build a kernel including modules | |
c8447161 | 628 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
1da177e4 LT |
629 | all: vmlinux |
630 | ||
c64ba044 ND |
631 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ |
632 | $(call cc-option,-fno-tree-loop-im) \ | |
633 | $(call cc-disable-warning,maybe-uninitialized,) | |
433dc2eb MY |
634 | export CFLAGS_GCOV CFLAGS_KCOV |
635 | ||
6dd3f13e MM |
636 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
637 | # values of the respective KBUILD_* variables | |
638 | ARCH_CPPFLAGS := | |
639 | ARCH_AFLAGS := | |
640 | ARCH_CFLAGS := | |
a436bb7b | 641 | include arch/$(SRCARCH)/Makefile |
a1c48bb1 GU |
642 | |
643 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
ef6000b4 | 644 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
645 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
646 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
647 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
a1c48bb1 | 648 | |
1da177e4 | 649 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
6748cb3c BW |
650 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
651 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) | |
1da177e4 | 652 | else |
815eb71e | 653 | ifdef CONFIG_PROFILE_ALL_BRANCHES |
a76bcf55 | 654 | KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
815eb71e AB |
655 | else |
656 | KBUILD_CFLAGS += -O2 | |
657 | endif | |
1da177e4 LT |
658 | endif |
659 | ||
a76bcf55 AB |
660 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
661 | $(call cc-disable-warning,maybe-uninitialized,)) | |
662 | ||
69102311 JK |
663 | # Tell gcc to never replace conditional load with a non-conditional one |
664 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
665 | ||
d677a4d6 | 666 | include scripts/Makefile.kcov |
6b90bd4b ER |
667 | include scripts/Makefile.gcc-plugins |
668 | ||
1873e870 AK |
669 | ifdef CONFIG_READABLE_ASM |
670 | # Disable optimizations that make assembler listings hard to read. | |
671 | # reorder blocks reorders the control in the function | |
672 | # ipa clone creates specialized cloned functions | |
673 | # partial inlining inlines only parts of functions | |
674 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
675 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
676 | $(call cc-option,-fno-partial-inlining) | |
677 | endif | |
678 | ||
08f67461 | 679 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
680 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
681 | endif | |
682 | ||
c965b105 KC |
683 | # This selects the stack protector compiler flag. Testing it is delayed |
684 | # until after .config has been reprocessed, in the prepare-compiler-check | |
685 | # target. | |
44c6dc94 KC |
686 | ifdef CONFIG_CC_STACKPROTECTOR_AUTO |
687 | stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector)) | |
688 | stackp-name := AUTO | |
689 | else | |
8779657d | 690 | ifdef CONFIG_CC_STACKPROTECTOR_REGULAR |
19952a92 | 691 | stackp-flag := -fstack-protector |
c965b105 | 692 | stackp-name := REGULAR |
6c15b327 JB |
693 | else |
694 | ifdef CONFIG_CC_STACKPROTECTOR_STRONG | |
8779657d | 695 | stackp-flag := -fstack-protector-strong |
c965b105 | 696 | stackp-name := STRONG |
19952a92 | 697 | else |
44c6dc94 KC |
698 | # If either there is no stack protector for this architecture or |
699 | # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name) | |
700 | # is empty, skipping all remaining stack protector tests. | |
701 | # | |
19952a92 | 702 | # Force off for distro compilers that enable stack protector by default. |
44c6dc94 KC |
703 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) |
704 | endif | |
5d707e9c | 705 | endif |
6c15b327 | 706 | endif |
c965b105 | 707 | # Find arch-specific stack protector compiler sanity-checking script. |
2bc2f688 | 708 | ifdef stackp-name |
44c6dc94 | 709 | ifneq ($(stackp-flag),) |
228d96c6 KC |
710 | stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh |
711 | stackp-check := $(wildcard $(stackp-path)) | |
2b838392 KC |
712 | # If the wildcard test matches a test script, run it to check functionality. |
713 | ifdef stackp-check | |
714 | ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) | |
715 | stackp-broken := y | |
716 | endif | |
717 | endif | |
2bc2f688 KC |
718 | ifndef stackp-broken |
719 | # If the stack protector is functional, enable code that depends on it. | |
720 | KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR | |
44c6dc94 KC |
721 | # Either we've already detected the flag (for AUTO) or we'll fail the |
722 | # build in the prepare-compiler-check rule (for specific flag). | |
723 | KBUILD_CFLAGS += $(stackp-flag) | |
724 | else | |
725 | # We have to make sure stack protector is unconditionally disabled if | |
726 | # the compiler is broken (in case we're going to continue the build in | |
727 | # AUTO mode). | |
728 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) | |
2bc2f688 | 729 | endif |
c965b105 | 730 | endif |
44c6dc94 | 731 | endif |
e06b8b98 | 732 | |
cfe17c9b MY |
733 | ifeq ($(cc-name),clang) |
734 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) | |
cfe17c9b MY |
735 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
736 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
737 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
738 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
739 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
740 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
741 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
742 | # See modpost pattern 2 | |
743 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
744 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
cfe17c9b MY |
745 | else |
746 | ||
747 | # These warnings generated too much noise in a regular build. | |
748 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
749 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
cfe17c9b MY |
750 | endif |
751 | ||
0a5f4176 | 752 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
1da177e4 | 753 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 754 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 755 | else |
7e9501fd RV |
756 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
757 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
758 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
759 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
760 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
761 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 762 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 763 | endif |
7e9501fd | 764 | endif |
1da177e4 | 765 | |
2062afb4 LT |
766 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
767 | ||
1da177e4 | 768 | ifdef CONFIG_DEBUG_INFO |
866ced95 AK |
769 | ifdef CONFIG_DEBUG_INFO_SPLIT |
770 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) | |
771 | else | |
a0f97e06 | 772 | KBUILD_CFLAGS += -g |
866ced95 | 773 | endif |
2288328c | 774 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 775 | endif |
bfaf2dd3 AK |
776 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
777 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) | |
778 | endif | |
1da177e4 | 779 | |
d6f4ceb7 | 780 | ifdef CONFIG_DEBUG_INFO_REDUCED |
e82c4bb8 AK |
781 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
782 | $(call cc-option,-fno-var-tracking) | |
d6f4ceb7 AK |
783 | endif |
784 | ||
606576ce | 785 | ifdef CONFIG_FUNCTION_TRACER |
c0a80c0c HC |
786 | ifndef CC_FLAGS_FTRACE |
787 | CC_FLAGS_FTRACE := -pg | |
788 | endif | |
789 | export CC_FLAGS_FTRACE | |
a2546fae SR |
790 | ifdef CONFIG_HAVE_FENTRY |
791 | CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) | |
792 | endif | |
c0a80c0c | 793 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) |
a2546fae | 794 | KBUILD_AFLAGS += $(CC_USING_FENTRY) |
72441cb1 | 795 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 796 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
797 | BUILD_C_RECORDMCOUNT := y |
798 | export BUILD_C_RECORDMCOUNT | |
799 | endif | |
800 | endif | |
16444a8a ACM |
801 | endif |
802 | ||
91341d4b SR |
803 | # We trigger additional mismatches with less inlining |
804 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
805 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
806 | endif | |
807 | ||
90ad4052 | 808 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
6ca8d943 NP |
809 | KBUILD_CFLAGS_KERNEL += $(call cc-option,-ffunction-sections,) |
810 | KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdata-sections,) | |
90ad4052 MY |
811 | endif |
812 | ||
e8e69931 | 813 | # arch Makefile may override CC so keep this after arch Makefile is included |
e08d6de4 | 814 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 | 815 | |
1da177e4 | 816 | # warn about C99 declaration after statement |
a0f97e06 | 817 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
1da177e4 | 818 | |
070b98bf | 819 | # disable pointer signed / unsigned warnings in gcc 4.0 |
8417da6f | 820 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
1da177e4 | 821 | |
fe8d0a41 | 822 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 823 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 824 | |
87e0d4f0 DB |
825 | # clang sets -fmerge-all-constants by default as optimization, but this |
826 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
827 | # need to disable it here generally. | |
828 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
829 | ||
830 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
831 | # to have actual conforming behavior enabled. | |
832 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
833 | ||
3ce120b1 LT |
834 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
835 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
836 | ||
8f7f5c9f AK |
837 | # conserve stack if available |
838 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
839 | ||
80970472 ST |
840 | # disallow errors like 'EXPORT_GPL(foo);' with missing header |
841 | KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) | |
842 | ||
843 | # require functions to have arguments in prototypes, not empty 'int foo()' | |
844 | KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) | |
845 | ||
fe7c36c7 JT |
846 | # Prohibit date/time macros, which would make the build non-deterministic |
847 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
848 | ||
ea8daa7b DW |
849 | # enforce correct pointer usage |
850 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
851 | ||
c834f0e8 KC |
852 | # Require designated initializers for all marked structures |
853 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
854 | ||
a73619a8 MY |
855 | # change __FILE__ to the relative path from the srctree |
856 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
857 | ||
40df759e MM |
858 | # use the deterministic mode of AR if available |
859 | KBUILD_ARFLAGS := $(call ar-option,D) | |
860 | ||
a436bb7b MY |
861 | include scripts/Makefile.kasan |
862 | include scripts/Makefile.extrawarn | |
c6d30853 | 863 | include scripts/Makefile.ubsan |
a86fe353 | 864 | |
61754c18 MM |
865 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
866 | # last assignments | |
867 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
868 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
869 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
52bcc330 | 870 | |
18991197 | 871 | # Use --build-id when available. |
0da4fabd | 872 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
6588169d | 873 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
874 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
875 | ||
b67067f1 NP |
876 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
877 | LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) | |
878 | endif | |
879 | ||
5d7d18f5 | 880 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 881 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
882 | endif |
883 | ||
14516765 LVO |
884 | # insure the checker run with the right endianness |
885 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
886 | ||
1f2f01b1 LVO |
887 | # the checker needs the correct machine size |
888 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
889 | ||
1da177e4 | 890 | # Default kernel image to build when no specific target is given. |
070b98bf | 891 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
892 | # set in the environment |
893 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
894 | # this default value | |
895 | export KBUILD_IMAGE ?= vmlinux | |
896 | ||
897 | # | |
898 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
899 | # images. Default is /boot, but you can set it to other values | |
900 | export INSTALL_PATH ?= /boot | |
901 | ||
f4d4ffc0 JC |
902 | # |
903 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
904 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
905 | # an argument if needed. Otherwise it defaults to the kernel install path | |
906 | # | |
907 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
908 | ||
1da177e4 LT |
909 | # |
910 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
911 | # relocations required by build roots. This is not defined in the | |
070b98bf | 912 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
913 | # |
914 | ||
df9df036 | 915 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
916 | export MODLIB |
917 | ||
ac031f26 | 918 | # |
3fbb43df MY |
919 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
920 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
921 | # the default option --strip-debug will be used. Otherwise, | |
922 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 923 | |
ac031f26 TT |
924 | ifdef INSTALL_MOD_STRIP |
925 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 926 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 927 | else |
2ea03891 | 928 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
929 | endif # INSTALL_MOD_STRIP=1 |
930 | else | |
2ea03891 | 931 | mod_strip_cmd = true |
ac031f26 TT |
932 | endif # INSTALL_MOD_STRIP |
933 | export mod_strip_cmd | |
934 | ||
beb50df3 BJ |
935 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
936 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
937 | # or CONFIG_MODULE_COMPRESS_XZ. | |
938 | ||
939 | mod_compress_cmd = true | |
940 | ifdef CONFIG_MODULE_COMPRESS | |
941 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
3d1450d5 | 942 | mod_compress_cmd = gzip -n -f |
beb50df3 BJ |
943 | endif # CONFIG_MODULE_COMPRESS_GZIP |
944 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
3d1450d5 | 945 | mod_compress_cmd = xz -f |
beb50df3 BJ |
946 | endif # CONFIG_MODULE_COMPRESS_XZ |
947 | endif # CONFIG_MODULE_COMPRESS | |
948 | export mod_compress_cmd | |
949 | ||
1bf49dd4 | 950 | # Select initial ramdisk compression format, default is gzip(1). |
951 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
952 | # | |
7ac18156 JB |
953 | INITRD_COMPRESS-y := gzip |
954 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
955 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
956 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
957 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
958 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
b7000ade LT |
959 | # do not export INITRD_COMPRESS, since we didn't actually |
960 | # choose a sane default compression above. | |
961 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
1da177e4 | 962 | |
d9d8d7ed | 963 | ifdef CONFIG_MODULE_SIG_ALL |
3ee550f1 DW |
964 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
965 | ||
966 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
e2a666d5 RR |
967 | else |
968 | mod_sign_cmd = true | |
969 | endif | |
970 | export mod_sign_cmd | |
971 | ||
9f0c18ae JP |
972 | ifdef CONFIG_STACK_VALIDATION |
973 | has_libelf := $(call try-run,\ | |
974 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) | |
975 | ifeq ($(has_libelf),1) | |
976 | objtool_target := tools/objtool FORCE | |
977 | else | |
11af8474 JP |
978 | ifdef CONFIG_UNWINDER_ORC |
979 | $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") | |
3dd40cb3 JP |
980 | else |
981 | $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") | |
982 | endif | |
9f0c18ae JP |
983 | SKIP_STACK_VALIDATION := 1 |
984 | export SKIP_STACK_VALIDATION | |
985 | endif | |
986 | endif | |
987 | ||
e2a666d5 | 988 | |
1da177e4 | 989 | ifeq ($(KBUILD_EXTMOD),) |
cfc411e7 | 990 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
991 | |
992 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
993 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
37d9fe47 | 994 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
1da177e4 LT |
995 | |
996 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
37d9fe47 | 997 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
1da177e4 | 998 | |
f49821ee NP |
999 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
1000 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1001 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1002 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1da177e4 | 1003 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
f49821ee NP |
1004 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
1005 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1da177e4 | 1006 | |
1f2bfbd0 | 1007 | # Externally visible symbols (used by link-vmlinux.sh) |
95698570 | 1008 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) |
3a166fc2 NP |
1009 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) |
1010 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
95698570 | 1011 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1f2bfbd0 | 1012 | export LDFLAGS_vmlinux |
312a3d09 | 1013 | # used by scripts/package/Makefile |
37d9fe47 | 1014 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
9bb48247 | 1015 | |
3a166fc2 | 1016 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) |
1da177e4 | 1017 | |
3fdc7d3f MY |
1018 | # Recurse until adjust_autoksyms.sh is satisfied |
1019 | PHONY += autoksyms_recursive | |
1020 | autoksyms_recursive: $(vmlinux-deps) | |
2441e78b | 1021 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
ba79d401 | 1022 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
86556392 | 1023 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
2441e78b | 1024 | endif |
23121ca2 | 1025 | |
1f50b80a MY |
1026 | # For the kernel to actually contain only the needed exported symbols, |
1027 | # we have to build modules as well to determine what those symbols are. | |
1028 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1029 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1030 | KBUILD_MODULES := 1 | |
1031 | endif | |
1032 | ||
07a422bb MY |
1033 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1034 | ||
1035 | $(autoksyms_h): | |
1036 | $(Q)mkdir -p $(dir $@) | |
1037 | $(Q)touch $@ | |
23121ca2 | 1038 | |
fbe6e37d NP |
1039 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
1040 | ||
1041 | # Final link of vmlinux with optional arch pass after final link | |
312a3d09 C |
1042 | cmd_link-vmlinux = \ |
1043 | $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
fbe6e37d | 1044 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
2441e78b | 1045 | |
3fdc7d3f MY |
1046 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
1047 | ifdef CONFIG_HEADERS_CHECK | |
1048 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check | |
1049 | endif | |
1050 | ifdef CONFIG_GDB_SCRIPTS | |
1051 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1052 | endif | |
1f2bfbd0 | 1053 | +$(call if_changed,link-vmlinux) |
741f98fe | 1054 | |
dd92478a NP |
1055 | # Build samples along the rest of the kernel |
1056 | ifdef CONFIG_SAMPLES | |
1057 | vmlinux-dirs += samples | |
1058 | endif | |
1059 | ||
38385f8f | 1060 | # The actual objects are generated when descending, |
1da177e4 | 1061 | # make sure no implicit rule kicks in |
1f2bfbd0 | 1062 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
1063 | |
1064 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1065 | # Preset locale variables to speed up the build process. Limit locale | |
1066 | # tweaks to this spot to avoid wrong language settings when running | |
1067 | # make menuconfig etc. | |
1068 | # Error messages still appears in the original language | |
1069 | ||
4f193362 | 1070 | PHONY += $(vmlinux-dirs) |
5bb78269 | 1071 | $(vmlinux-dirs): prepare scripts |
f7adc312 | 1072 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
1da177e4 | 1073 | |
0d0e7718 MM |
1074 | define filechk_kernel.release |
1075 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1076 | endef | |
1077 | ||
83a35e36 | 1078 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
f1d28fb0 | 1079 | include/config/kernel.release: include/config/auto.conf FORCE |
0d0e7718 | 1080 | $(call filechk,kernel.release) |
cb58455c | 1081 | |
d8821622 MY |
1082 | # Additional helpers built in scripts/ |
1083 | # Carefully list dependencies so we do not try to build scripts twice | |
1084 | # in parallel | |
1085 | PHONY += scripts | |
1086 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ | |
07a422bb | 1087 | asm-generic gcc-plugins $(autoksyms_h) |
d8821622 | 1088 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1089 | |
1da177e4 | 1090 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1091 | # or the modules are listed in "prepare". |
1092 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1093 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1094 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1095 | |
5bb78269 | 1096 | # Listed in dependency order |
4f193362 | 1097 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 | 1098 | |
86feeaa8 | 1099 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
1100 | # and if so do: |
1101 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 1102 | prepare3: include/config/kernel.release |
1da177e4 | 1103 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 1104 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 1105 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
1106 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
1107 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
1108 | /bin/false; \ |
1109 | fi; | |
1da177e4 LT |
1110 | endif |
1111 | ||
c965b105 KC |
1112 | # prepare2 creates a makefile if using a separate output directory. |
1113 | # From this point forward, .config has been reprocessed, so any rules | |
1114 | # that need to depend on updated CONFIG_* values can be checked here. | |
1115 | prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic | |
1da177e4 | 1116 | |
07a422bb | 1117 | prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
f7f16b77 | 1118 | include/config/auto.conf |
7bb9d092 | 1119 | $(cmd_crmodverdir) |
1da177e4 | 1120 | |
6520fe55 | 1121 | archprepare: archheaders archscripts prepare1 scripts_basic |
5bb78269 | 1122 | |
6b90bd4b | 1123 | prepare0: archprepare gcc-plugins |
8d36a623 | 1124 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 1125 | |
1da177e4 | 1126 | # All the preparing.. |
b9ab5ebb JP |
1127 | prepare: prepare0 prepare-objtool |
1128 | ||
2c1f4f12 MY |
1129 | # Support for using generic headers in asm-generic |
1130 | PHONY += asm-generic uapi-asm-generic | |
1131 | asm-generic: uapi-asm-generic | |
1132 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
1133 | src=asm obj=arch/$(SRCARCH)/include/generated/asm | |
1134 | uapi-asm-generic: | |
1135 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
1136 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm | |
1137 | ||
b9ab5ebb | 1138 | PHONY += prepare-objtool |
3b27a0c8 | 1139 | prepare-objtool: $(objtool_target) |
1da177e4 | 1140 | |
c965b105 KC |
1141 | # Check for CONFIG flags that require compiler support. Abort the build |
1142 | # after .config has been processed, but before the kernel build starts. | |
1143 | # | |
1144 | # For security-sensitive CONFIG options, we don't want to fallback and/or | |
1145 | # silently change which compiler flags will be used, since that leads to | |
1146 | # producing kernels with different security feature characteristics | |
1147 | # depending on the compiler used. (For example, "But I selected | |
1148 | # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") | |
1149 | PHONY += prepare-compiler-check | |
1150 | prepare-compiler-check: FORCE | |
1151 | # Make sure compiler supports requested stack protector flag. | |
1152 | ifdef stackp-name | |
44c6dc94 KC |
1153 | # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option. |
1154 | ifeq ($(stackp-flag),) | |
1155 | @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1156 | Compiler does not support any known stack-protector >&2 | |
1157 | else | |
1158 | # Fail if specifically requested stack protector is missing. | |
c965b105 KC |
1159 | ifeq ($(call cc-option, $(stackp-flag)),) |
1160 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1161 | $(stackp-flag) not supported by compiler >&2 && exit 1 | |
1162 | endif | |
44c6dc94 | 1163 | endif |
c965b105 | 1164 | endif |
44c6dc94 KC |
1165 | # Make sure compiler does not have buggy stack-protector support. If a |
1166 | # specific stack-protector was requested, fail the build, otherwise warn. | |
2b838392 | 1167 | ifdef stackp-broken |
44c6dc94 KC |
1168 | ifeq ($(stackp-name),AUTO) |
1169 | @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1170 | $(stackp-flag) available but compiler is broken: disabling >&2 | |
1171 | else | |
c965b105 KC |
1172 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ |
1173 | $(stackp-flag) available but compiler is broken >&2 && exit 1 | |
44c6dc94 | 1174 | endif |
c965b105 KC |
1175 | endif |
1176 | @: | |
1177 | ||
1da177e4 LT |
1178 | # Generate some files |
1179 | # --------------------------------------------------------------------------- | |
1180 | ||
1181 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1182 | # needs to be updated, so this check is forced on all builds | |
1183 | ||
1184 | uts_len := 64 | |
63104eec SR |
1185 | define filechk_utsrelease.h |
1186 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1187 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1188 | exit 1; \ | |
1189 | fi; \ | |
1190 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1191 | endef | |
1da177e4 LT |
1192 | |
1193 | define filechk_version.h | |
450c6076 JJ |
1194 | (echo \#define LINUX_VERSION_CODE $(shell \ |
1195 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
63104eec | 1196 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
1da177e4 LT |
1197 | endef |
1198 | ||
d183e6f5 | 1199 | $(version_h): $(srctree)/Makefile FORCE |
1da177e4 | 1200 | $(call filechk,version.h) |
223c24a7 | 1201 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1202 | |
273b281f | 1203 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1204 | $(call filechk,utsrelease.h) |
1205 | ||
179efcb4 VN |
1206 | PHONY += headerdep |
1207 | headerdep: | |
9663d989 PF |
1208 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1209 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1210 | |
8d730cfb DW |
1211 | # --------------------------------------------------------------------------- |
1212 | # Kernel headers | |
8d730cfb | 1213 | |
e6883b18 SR |
1214 | #Default location for installed headers |
1215 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1216 | |
9d022c54 MY |
1217 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
1218 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
e6883b18 | 1219 | |
052ad274 PA |
1220 | PHONY += archheaders |
1221 | archheaders: | |
1222 | ||
6520fe55 PA |
1223 | PHONY += archscripts |
1224 | archscripts: | |
1225 | ||
e6883b18 | 1226 | PHONY += __headers |
a9d9a400 | 1227 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
e1b702cf | 1228 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1229 | |
1230 | PHONY += headers_install_all | |
2fb9b1bd SR |
1231 | headers_install_all: |
1232 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1233 | |
8d730cfb | 1234 | PHONY += headers_install |
e6883b18 | 1235 | headers_install: __headers |
9d022c54 | 1236 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
10b63956 | 1237 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
a8ff49a1 | 1238 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
9d022c54 | 1239 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
8d730cfb | 1240 | |
1f85712e MF |
1241 | PHONY += headers_check_all |
1242 | headers_check_all: headers_install_all | |
2fb9b1bd | 1243 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1244 | |
68475359 DW |
1245 | PHONY += headers_check |
1246 | headers_check: headers_install | |
a8ff49a1 | 1247 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
9d022c54 | 1248 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
68475359 | 1249 | |
5a5da78b SK |
1250 | # --------------------------------------------------------------------------- |
1251 | # Kernel selftest | |
1252 | ||
1253 | PHONY += kselftest | |
1254 | kselftest: | |
2bc84526 | 1255 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1256 | |
801d2e9f | 1257 | PHONY += kselftest-clean |
dcb825a9 | 1258 | kselftest-clean: |
2bc84526 | 1259 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
dcb825a9 | 1260 | |
3d6dee7a BJZ |
1261 | PHONY += kselftest-merge |
1262 | kselftest-merge: | |
1263 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1264 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1265 | -m $(objtree)/.config \ | |
1266 | $(srctree)/tools/testing/selftests/*/config | |
1267 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
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 |
2da30e70 | 1285 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1286 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1287 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1288 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1289 | |
a6c36632 MM |
1290 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1291 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1292 | ||
73d1393e | 1293 | %/modules.builtin: include/config/auto.conf |
a6c36632 MM |
1294 | $(Q)$(MAKE) $(modbuiltin)=$* |
1295 | ||
1da177e4 LT |
1296 | |
1297 | # Target to prepare building external modules | |
4f193362 | 1298 | PHONY += modules_prepare |
5bb78269 | 1299 | modules_prepare: prepare scripts |
1da177e4 LT |
1300 | |
1301 | # Target to install modules | |
4f193362 | 1302 | PHONY += modules_install |
1da177e4 LT |
1303 | modules_install: _modinst_ _modinst_post |
1304 | ||
4f193362 | 1305 | PHONY += _modinst_ |
2da30e70 | 1306 | _modinst_: |
1da177e4 LT |
1307 | @rm -rf $(MODLIB)/kernel |
1308 | @rm -f $(MODLIB)/source | |
1309 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1310 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1311 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1312 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1313 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1314 | fi |
551559e1 | 1315 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1316 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1317 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1318 | |
50a8ec31 | 1319 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1320 | # boot a modules.dep even before / is mounted read-write. However the |
1321 | # boot script depmod is the master version. | |
4f193362 | 1322 | PHONY += _modinst_post |
6d128e1e | 1323 | _modinst_post: _modinst_ |
50a8ec31 | 1324 | $(call cmd,depmod) |
1da177e4 | 1325 | |
d890f510 JB |
1326 | ifeq ($(CONFIG_MODULE_SIG), y) |
1327 | PHONY += modules_sign | |
1328 | modules_sign: | |
1329 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1330 | endif | |
1331 | ||
1da177e4 LT |
1332 | else # CONFIG_MODULES |
1333 | ||
1334 | # Modules not configured | |
1335 | # --------------------------------------------------------------------------- | |
1336 | ||
612e47ce MY |
1337 | PHONY += modules modules_install |
1338 | modules modules_install: | |
5369f550 MM |
1339 | @echo >&2 |
1340 | @echo >&2 "The present kernel configuration has modules disabled." | |
1341 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1342 | @echo >&2 "Then build a kernel with module support enabled." | |
1343 | @echo >&2 | |
1da177e4 LT |
1344 | @exit 1 |
1345 | ||
1346 | endif # CONFIG_MODULES | |
1347 | ||
1da177e4 LT |
1348 | ### |
1349 | # Cleaning is done on three levels. | |
1350 | # make clean Delete most generated files | |
1351 | # Leave enough to build external modules | |
1352 | # make mrproper Delete the current configuration, and all generated files | |
1353 | # make distclean Remove editor backup files, patch leftover files and the like | |
1354 | ||
1355 | # Directories & files removed with 'make clean' | |
fbfa9be9 | 1356 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
1da177e4 LT |
1357 | |
1358 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1359 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1360 | arch/*/include/generated .tmp_objdiff |
278ae604 | 1361 | MRPROPER_FILES += .config .config.old .version \ |
d5b71936 | 1362 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
fb117949 DW |
1363 | signing_key.pem signing_key.priv signing_key.x509 \ |
1364 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1365 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1366 | |
1367 | # clean - Delete most, but leave enough to build external modules | |
1368 | # | |
1369 | clean: rm-dirs := $(CLEAN_DIRS) | |
1370 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1371 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1372 | |
bd1ee804 | 1373 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1374 | $(clean-dirs): |
1375 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
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 | |
4f193362 | 1389 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1390 | $(mrproper-dirs): |
1391 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1392 | ||
1393 | mrproper: clean archmrproper $(mrproper-dirs) | |
1394 | $(call cmd,rmdirs) | |
1395 | $(call cmd,rmfiles) | |
1396 | ||
1397 | # distclean | |
1398 | # | |
4f193362 | 1399 | PHONY += distclean |
1da177e4 LT |
1400 | |
1401 | distclean: mrproper | |
1402 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1403 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df MY |
1404 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
1405 | -o -name 'core' \) \ | |
1da177e4 LT |
1406 | -type f -print | xargs rm -f |
1407 | ||
1408 | ||
1409 | # Packaging of the kernel to various formats | |
1410 | # --------------------------------------------------------------------------- | |
1411 | # rpm target kept for backward compatibility | |
c79624c1 | 1412 | package-dir := scripts/package |
1da177e4 | 1413 | |
bafb6747 ACM |
1414 | %src-pkg: FORCE |
1415 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1416 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1417 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
ebaad7d3 MY |
1418 | rpm: rpm-pkg |
1419 | @echo " WARNING: \"rpm\" target will be removed after Linux 4.18" | |
1420 | @echo " Please use \"rpm-pkg\" instead." | |
1da177e4 LT |
1421 | |
1422 | ||
1423 | # Brief documentation of the typical targets used | |
1424 | # --------------------------------------------------------------------------- | |
1425 | ||
5dffbe81 | 1426 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1427 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1428 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1429 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1430 | |
fe69b420 | 1431 | PHONY += help |
1da177e4 LT |
1432 | help: |
1433 | @echo 'Cleaning targets:' | |
5ea084ef | 1434 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1435 | @echo ' enough build support to build external modules' |
5ea084ef | 1436 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1437 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1438 | @echo '' |
1439 | @echo 'Configuration targets:' | |
1440 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1441 | @echo '' | |
1442 | @echo 'Other generic targets:' | |
1443 | @echo ' all - Build all targets marked with [*]' | |
1444 | @echo '* vmlinux - Build the bare kernel' | |
1445 | @echo '* modules - Build all modules' | |
9cc5d74c | 1446 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1447 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1448 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1449 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1450 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1451 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1452 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1453 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1454 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1455 | @echo ' tags/TAGS - Generate tags file for editors' |
1456 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1457 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1458 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1459 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1460 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1461 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1462 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1463 | echo '' |
31b8cc80 | 1464 | @echo 'Static analysers:' |
1da177e4 LT |
1465 | @echo ' checkstack - Generate a list of stack hogs' |
1466 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1467 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1468 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1469 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1470 | @echo ' headers_check - Sanity check on exported headers' |
74425eee | 1471 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1472 | @echo ' coccicheck - Check with Coccinelle' |
74425eee | 1473 | @echo '' |
31b8cc80 | 1474 | @echo 'Kernel selftest:' |
5a5da78b SK |
1475 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
1476 | @echo ' Build, install, and boot kernel before' | |
1477 | @echo ' running kselftest on it' | |
dcb825a9 | 1478 | @echo ' kselftest-clean - Remove all generated kselftest files' |
bbfe63b6 | 1479 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
3d6dee7a | 1480 | @echo ' .config.' |
5a5da78b | 1481 | @echo '' |
31b8cc80 RD |
1482 | @echo 'Userspace tools targets:' |
1483 | @echo ' use "make tools/help"' | |
1484 | @echo ' or "cd tools; make help"' | |
1485 | @echo '' | |
1da177e4 | 1486 | @echo 'Kernel packaging:' |
6c2133e1 | 1487 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1488 | @echo '' |
1489 | @echo 'Documentation targets:' | |
cb43fb57 | 1490 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1491 | @echo '' |
01dee188 | 1492 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1493 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1494 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1495 | @echo '' |
1496 | @$(if $(boards), \ | |
1497 | $(foreach b, $(boards), \ | |
1498 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1499 | echo '') | |
5dffbe81 SB |
1500 | @$(if $(board-dirs), \ |
1501 | $(foreach b, $(board-dirs), \ | |
1502 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1503 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1504 | echo '') | |
1da177e4 LT |
1505 | |
1506 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1507 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1508 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
9ba26a72 | 1509 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
701842e3 | 1510 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1511 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1512 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1513 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1514 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1515 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1516 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1517 | @echo '' |
1518 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1519 | @echo 'For further info see the ./README file' | |
1520 | ||
1521 | ||
5dffbe81 SB |
1522 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1523 | ||
1524 | help-boards: $(help-board-dirs) | |
1525 | ||
fbae4d58 | 1526 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1527 | |
1528 | $(help-board-dirs): help-%: | |
1529 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1530 | @$(if $(boards-per-dir), \ | |
1531 | $(foreach b, $(boards-per-dir), \ | |
1532 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1533 | echo '') | |
1534 | ||
1535 | ||
1da177e4 LT |
1536 | # Documentation targets |
1537 | # --------------------------------------------------------------------------- | |
e8939222 JN |
1538 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1539 | linkcheckdocs dochelp refcheckdocs | |
22cba31b JN |
1540 | PHONY += $(DOC_TARGETS) |
1541 | $(DOC_TARGETS): scripts_basic FORCE | |
cb43fb57 | 1542 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 LT |
1543 | |
1544 | else # KBUILD_EXTMOD | |
1545 | ||
1546 | ### | |
1547 | # External module support. | |
1548 | # When building external modules the kernel used as basis is considered | |
1549 | # read-only, and no consistency checks are made and the make | |
1550 | # system is not used on the basis kernel. If updates are required | |
1551 | # in the basis kernel ordinary make commands (without M=...) must | |
1552 | # be used. | |
1553 | # | |
1554 | # The following are the only valid targets when building external | |
1555 | # modules. | |
1556 | # make M=dir clean Delete all automatically generated files | |
1557 | # make M=dir modules Make all modules in specified dir | |
1558 | # make M=dir Same as 'make M=dir modules' | |
1559 | # make M=dir modules_install | |
070b98bf | 1560 | # Install the modules built in the module directory |
1da177e4 LT |
1561 | # Assumes install directory is already created |
1562 | ||
1563 | # We are always building modules | |
1564 | KBUILD_MODULES := 1 | |
4f193362 | 1565 | PHONY += crmodverdir |
1da177e4 | 1566 | crmodverdir: |
7bb9d092 | 1567 | $(cmd_crmodverdir) |
1da177e4 | 1568 | |
4f193362 | 1569 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1570 | $(objtree)/Module.symvers: |
1571 | @test -e $(objtree)/Module.symvers || ( \ | |
1572 | echo; \ | |
1573 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1574 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1575 | echo ) | |
1576 | ||
1577 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1578 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1579 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1580 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1581 | ||
1582 | modules: $(module-dirs) | |
fd54f502 | 1583 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1584 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1585 | |
4f193362 | 1586 | PHONY += modules_install |
a67dc21a | 1587 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1588 | |
4f193362 PS |
1589 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1590 | PHONY += _emodinst_ | |
a67dc21a | 1591 | _emodinst_: |
a67dc21a | 1592 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1593 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1594 | |
4f193362 | 1595 | PHONY += _emodinst_post |
a67dc21a SR |
1596 | _emodinst_post: _emodinst_ |
1597 | $(call cmd,depmod) | |
1598 | ||
1da177e4 LT |
1599 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1600 | ||
4f193362 | 1601 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1602 | $(clean-dirs): |
1603 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1604 | ||
1605 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1606 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 | 1607 | |
fe69b420 | 1608 | PHONY += help |
1da177e4 LT |
1609 | help: |
1610 | @echo ' Building external modules.' | |
1611 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1612 | @echo '' | |
1613 | @echo ' modules - default target, build the module(s)' | |
1614 | @echo ' modules_install - install the module' | |
1615 | @echo ' clean - remove generated files in module directory only' | |
1616 | @echo '' | |
06300b21 SR |
1617 | |
1618 | # Dummies... | |
4f193362 | 1619 | PHONY += prepare scripts |
06300b21 SR |
1620 | prepare: ; |
1621 | scripts: ; | |
1da177e4 LT |
1622 | endif # KBUILD_EXTMOD |
1623 | ||
88d7be03 MM |
1624 | clean: $(clean-dirs) |
1625 | $(call cmd,rmdirs) | |
1626 | $(call cmd,rmfiles) | |
43f67c98 | 1627 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
ef46d9b3 | 1628 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
74ce1896 | 1629 | -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ |
ef46d9b3 | 1630 | -o -name '*.dwo' -o -name '*.lst' \ |
d523b255 | 1631 | -o -name '*.su' \ |
88d7be03 | 1632 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 1633 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 1634 | -o -name '*.asn1.[ch]' \ |
88d7be03 MM |
1635 | -o -name '*.symtypes' -o -name 'modules.order' \ |
1636 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
6b90bd4b | 1637 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 1638 | -o -name '*.ll' \ |
88d7be03 MM |
1639 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
1640 | ||
1da177e4 LT |
1641 | # Generate tags for editors |
1642 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1643 | quiet_cmd_tags = GEN $@ |
1644 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1645 | |
f4ed1009 | 1646 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1647 | $(call cmd,tags) |
1648 | ||
1da177e4 LT |
1649 | # Scripts to check various things for consistency |
1650 | # --------------------------------------------------------------------------- | |
1651 | ||
279f3dd3 PF |
1652 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1653 | ||
1da177e4 | 1654 | includecheck: |
436f876c | 1655 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1656 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1657 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1658 | |
1659 | versioncheck: | |
2ee2d292 | 1660 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1661 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1662 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1663 | |
74425eee NP |
1664 | coccicheck: |
1665 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1666 | ||
1da177e4 LT |
1667 | namespacecheck: |
1668 | $(PERL) $(srctree)/scripts/namespace.pl | |
1669 | ||
295ac051 AB |
1670 | export_report: |
1671 | $(PERL) $(srctree)/scripts/export_report.pl | |
1672 | ||
1da177e4 LT |
1673 | endif #ifeq ($(config-targets),1) |
1674 | endif #ifeq ($(mixed-targets),1) | |
1675 | ||
c398ff00 | 1676 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1677 | |
011e3a9a JD |
1678 | # UML needs a little special treatment here. It wants to use the host |
1679 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1680 | # else wants $(ARCH), including people doing cross-builds, which means | |
1681 | # that $(SUBARCH) doesn't work here. | |
1682 | ifeq ($(ARCH), um) | |
1683 | CHECKSTACK_ARCH := $(SUBARCH) | |
1684 | else | |
1685 | CHECKSTACK_ARCH := $(ARCH) | |
1686 | endif | |
1da177e4 LT |
1687 | checkstack: |
1688 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1689 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1690 | |
7b8ea53d AW |
1691 | kernelrelease: |
1692 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1693 | |
cb58455c | 1694 | kernelversion: |
2244cbd8 | 1695 | @echo $(KERNELVERSION) |
1da177e4 | 1696 | |
c398ff00 MM |
1697 | image_name: |
1698 | @echo $(KBUILD_IMAGE) | |
1699 | ||
ea01fa9f BP |
1700 | # Clear a bunch of variables before executing the submake |
1701 | tools/: FORCE | |
bf35182f | 1702 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1703 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1704 | |
1705 | tools/%: FORCE | |
bf35182f | 1706 | $(Q)mkdir -p $(objtree)/tools |
8e9b4667 | 1707 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1708 | |
06300b21 SR |
1709 | # Single targets |
1710 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1711 | # Single targets are compatible with: |
e1b8513d | 1712 | # - build with mixed source and output |
bc2546a6 SR |
1713 | # - build with separate output dir 'make O=...' |
1714 | # - external modules | |
1715 | # | |
1716 | # target-dir => where to store outputfile | |
1717 | # build-dir => directory in kernel source tree to use | |
1718 | ||
1719 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1720 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1721 | target-dir = $(dir $@) |
1722 | else | |
1723 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1724 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1725 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1726 | endif | |
1727 | ||
f6ecebd6 | 1728 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1729 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1730 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1731 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1732 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1733 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1734 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1735 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1736 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1737 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1738 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1739 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1740 | %.symtypes: %.c prepare scripts FORCE |
1741 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
433db3e2 VT |
1742 | %.ll: %.c prepare scripts FORCE |
1743 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1744 | |
bc2546a6 | 1745 | # Modules |
31110ebb SR |
1746 | /: prepare scripts FORCE |
1747 | $(cmd_crmodverdir) | |
1748 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1749 | $(build)=$(build-dir) | |
8e2faea8 | 1750 | # Make sure the latest headers are built for Documentation |
ddea05fa | 1751 | Documentation/ samples/: headers_install |
31110ebb | 1752 | %/: prepare scripts FORCE |
7bb9d092 | 1753 | $(cmd_crmodverdir) |
06300b21 | 1754 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1755 | $(build)=$(build-dir) |
1756 | %.ko: prepare scripts FORCE | |
7bb9d092 | 1757 | $(cmd_crmodverdir) |
06300b21 | 1758 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1759 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1760 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1761 | |
38385f8f | 1762 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1763 | # =========================================================================== |
1764 | ||
1765 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1766 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1767 | ||
1768 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1769 | cmd_rmfiles = rm -f $(rm-files) | |
1770 | ||
bc3c26fe | 1771 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 | 1772 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
569658dd | 1773 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
5a144a1a | 1774 | $(KERNELRELEASE) |
50a8ec31 | 1775 | |
7bb9d092 | 1776 | # Create temporary dir for module support files |
ab19f879 SR |
1777 | # clean it up only when building all modules |
1778 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1779 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1da177e4 | 1780 | |
1da177e4 LT |
1781 | # read all saved command lines |
1782 | ||
2982c953 | 1783 | cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) |
1da177e4 LT |
1784 | |
1785 | ifneq ($(cmd_files),) | |
1786 | $(cmd_files): ; # Do not try to update included dependency files | |
1787 | include $(cmd_files) | |
1788 | endif | |
1789 | ||
1da177e4 LT |
1790 | endif # skip-makefile |
1791 | ||
4f193362 | 1792 | PHONY += FORCE |
1da177e4 | 1793 | FORCE: |
4f193362 | 1794 | |
4f193362 | 1795 | # Declare the contents of the .PHONY variable as phony. We keep that |
fe8d0a41 | 1796 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 1797 | .PHONY: $(PHONY) |