| 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | VERSION = 4 |
| 3 | PATCHLEVEL = 20 |
| 4 | SUBLEVEL = 0 |
| 5 | EXTRAVERSION = -rc2 |
| 6 | NAME = "People's Front" |
| 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 | |
| 14 | # That's our default target when none is given on the command line |
| 15 | PHONY := _all |
| 16 | _all: |
| 17 | |
| 18 | # Do not use make's built-in rules and variables |
| 19 | # (this increases performance and avoids hard-to-debug behaviour) |
| 20 | MAKEFLAGS += -rR |
| 21 | |
| 22 | # Avoid funny character set dependencies |
| 23 | unexport LC_ALL |
| 24 | LC_COLLATE=C |
| 25 | LC_NUMERIC=C |
| 26 | export LC_COLLATE LC_NUMERIC |
| 27 | |
| 28 | # Avoid interference with shell env settings |
| 29 | unexport GREP_OPTIONS |
| 30 | |
| 31 | # We are using a recursive build, so we need to do a little thinking |
| 32 | # to get the ordering right. |
| 33 | # |
| 34 | # Most importantly: sub-Makefiles should only ever modify files in |
| 35 | # their own directory. If in some directory we have a dependency on |
| 36 | # a file in another dir (which doesn't happen often, but it's often |
| 37 | # unavoidable when linking the built-in.a targets which finally |
| 38 | # turn into vmlinux), we will call a sub make in that other dir, and |
| 39 | # after that we are sure that everything which is in that other dir |
| 40 | # is now up to date. |
| 41 | # |
| 42 | # The only cases where we need to modify files which have global |
| 43 | # effects are thus separated out and done before the recursive |
| 44 | # descending is started. They are now explicitly listed as the |
| 45 | # prepare rule. |
| 46 | |
| 47 | # Beautify output |
| 48 | # --------------------------------------------------------------------------- |
| 49 | # |
| 50 | # Normally, we echo the whole command before executing it. By making |
| 51 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| 52 | # $(quiet) to choose other forms of output instead, e.g. |
| 53 | # |
| 54 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| 55 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 56 | # |
| 57 | # If $(quiet) is empty, the whole command will be printed. |
| 58 | # If it is set to "quiet_", only the short version will be printed. |
| 59 | # If it is set to "silent_", nothing will be printed at all, since |
| 60 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| 61 | # |
| 62 | # A simple variant is to prefix commands with $(Q) - that's useful |
| 63 | # for commands that shall be hidden in non-verbose mode. |
| 64 | # |
| 65 | # $(Q)ln $@ :< |
| 66 | # |
| 67 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| 68 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| 69 | # |
| 70 | # To put more focus on warnings, be less verbose as default |
| 71 | # Use 'make V=1' to see the full commands |
| 72 | |
| 73 | ifeq ("$(origin V)", "command line") |
| 74 | KBUILD_VERBOSE = $(V) |
| 75 | endif |
| 76 | ifndef KBUILD_VERBOSE |
| 77 | KBUILD_VERBOSE = 0 |
| 78 | endif |
| 79 | |
| 80 | ifeq ($(KBUILD_VERBOSE),1) |
| 81 | quiet = |
| 82 | Q = |
| 83 | else |
| 84 | quiet=quiet_ |
| 85 | Q = @ |
| 86 | endif |
| 87 | |
| 88 | # If the user is running make -s (silent mode), suppress echoing of |
| 89 | # commands |
| 90 | |
| 91 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
| 92 | quiet=silent_ |
| 93 | tools_silent=s |
| 94 | endif |
| 95 | |
| 96 | export quiet Q KBUILD_VERBOSE |
| 97 | |
| 98 | # kbuild supports saving output files in a separate directory. |
| 99 | # To locate output files in a separate directory two syntaxes are supported. |
| 100 | # In both cases the working directory must be the root of the kernel src. |
| 101 | # 1) O= |
| 102 | # Use "make O=dir/to/store/output/files/" |
| 103 | # |
| 104 | # 2) Set KBUILD_OUTPUT |
| 105 | # Set the environment variable KBUILD_OUTPUT to point to the directory |
| 106 | # where the output files shall be placed. |
| 107 | # export KBUILD_OUTPUT=dir/to/store/output/files/ |
| 108 | # make |
| 109 | # |
| 110 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| 111 | # variable. |
| 112 | |
| 113 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
| 114 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. |
| 115 | ifeq ($(KBUILD_SRC),) |
| 116 | |
| 117 | # OK, Make called in directory where kernel src resides |
| 118 | # Do we want to locate output files in a separate directory? |
| 119 | ifeq ("$(origin O)", "command line") |
| 120 | KBUILD_OUTPUT := $(O) |
| 121 | endif |
| 122 | |
| 123 | # Cancel implicit rules on top Makefile |
| 124 | $(CURDIR)/Makefile Makefile: ; |
| 125 | |
| 126 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
| 127 | $(error main directory cannot contain spaces nor colons) |
| 128 | endif |
| 129 | |
| 130 | ifneq ($(KBUILD_OUTPUT),) |
| 131 | # check that the output directory actually exists |
| 132 | saved-output := $(KBUILD_OUTPUT) |
| 133 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
| 134 | && pwd) |
| 135 | $(if $(KBUILD_OUTPUT),, \ |
| 136 | $(error failed to create output directory "$(saved-output)")) |
| 137 | |
| 138 | # Look for make include files relative to root of kernel src |
| 139 | # |
| 140 | # This does not become effective immediately because MAKEFLAGS is re-parsed |
| 141 | # once after the Makefile is read. It is OK since we are going to invoke |
| 142 | # 'sub-make' below. |
| 143 | MAKEFLAGS += --include-dir=$(CURDIR) |
| 144 | |
| 145 | PHONY += $(MAKECMDGOALS) sub-make |
| 146 | |
| 147 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
| 148 | @: |
| 149 | |
| 150 | # Invoke a second make in the output directory, passing relevant variables |
| 151 | sub-make: |
| 152 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
| 153 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
| 154 | |
| 155 | # Leave processing to above invocation of make |
| 156 | skip-makefile := 1 |
| 157 | endif # ifneq ($(KBUILD_OUTPUT),) |
| 158 | endif # ifeq ($(KBUILD_SRC),) |
| 159 | |
| 160 | # We process the rest of the Makefile if this is the final invocation of make |
| 161 | ifeq ($(skip-makefile),) |
| 162 | |
| 163 | # Do not print "Entering directory ...", |
| 164 | # but we want to display it when entering to the output directory |
| 165 | # so that IDEs/editors are able to understand relative filenames. |
| 166 | MAKEFLAGS += --no-print-directory |
| 167 | |
| 168 | # Call a source code checker (by default, "sparse") as part of the |
| 169 | # C compilation. |
| 170 | # |
| 171 | # Use 'make C=1' to enable checking of only re-compiled files. |
| 172 | # Use 'make C=2' to enable checking of *all* source files, regardless |
| 173 | # of whether they are re-compiled or not. |
| 174 | # |
| 175 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
| 176 | # including where to get the "sparse" utility. |
| 177 | |
| 178 | ifeq ("$(origin C)", "command line") |
| 179 | KBUILD_CHECKSRC = $(C) |
| 180 | endif |
| 181 | ifndef KBUILD_CHECKSRC |
| 182 | KBUILD_CHECKSRC = 0 |
| 183 | endif |
| 184 | |
| 185 | # Use make M=dir to specify directory of external module to build |
| 186 | # Old syntax make ... SUBDIRS=$PWD is still supported |
| 187 | # Setting the environment variable KBUILD_EXTMOD take precedence |
| 188 | ifdef SUBDIRS |
| 189 | $(warning ================= WARNING ================) |
| 190 | $(warning 'SUBDIRS' will be removed after Linux 5.3) |
| 191 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) |
| 192 | $(warning ==========================================) |
| 193 | KBUILD_EXTMOD ?= $(SUBDIRS) |
| 194 | endif |
| 195 | |
| 196 | ifeq ("$(origin M)", "command line") |
| 197 | KBUILD_EXTMOD := $(M) |
| 198 | endif |
| 199 | |
| 200 | ifeq ($(KBUILD_SRC),) |
| 201 | # building in the source tree |
| 202 | srctree := . |
| 203 | else |
| 204 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) |
| 205 | # building in a subdirectory of the source tree |
| 206 | srctree := .. |
| 207 | else |
| 208 | srctree := $(KBUILD_SRC) |
| 209 | endif |
| 210 | endif |
| 211 | |
| 212 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC |
| 213 | |
| 214 | objtree := . |
| 215 | src := $(srctree) |
| 216 | obj := $(objtree) |
| 217 | |
| 218 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
| 219 | |
| 220 | export srctree objtree VPATH |
| 221 | |
| 222 | # To make sure we do not include .config for any of the *config targets |
| 223 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| 224 | # It is allowed to specify more targets when calling make, including |
| 225 | # mixing *config targets and build targets. |
| 226 | # For example 'make oldconfig all'. |
| 227 | # Detect when mixed targets is specified, and make a second invocation |
| 228 | # of make so .config is not included in this case either (for *config). |
| 229 | |
| 230 | version_h := include/generated/uapi/linux/version.h |
| 231 | old_version_h := include/linux/version.h |
| 232 | |
| 233 | clean-targets := %clean mrproper cleandocs |
| 234 | no-dot-config-targets := $(clean-targets) \ |
| 235 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
| 236 | $(version_h) headers_% archheaders archscripts \ |
| 237 | %asm-generic kernelversion %src-pkg |
| 238 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
| 239 | kernelrelease |
| 240 | |
| 241 | config-targets := 0 |
| 242 | mixed-targets := 0 |
| 243 | dot-config := 1 |
| 244 | may-sync-config := 1 |
| 245 | |
| 246 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 247 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 248 | dot-config := 0 |
| 249 | endif |
| 250 | endif |
| 251 | |
| 252 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| 253 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| 254 | may-sync-config := 0 |
| 255 | endif |
| 256 | endif |
| 257 | |
| 258 | ifneq ($(KBUILD_EXTMOD),) |
| 259 | may-sync-config := 0 |
| 260 | endif |
| 261 | |
| 262 | ifeq ($(KBUILD_EXTMOD),) |
| 263 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| 264 | config-targets := 1 |
| 265 | ifneq ($(words $(MAKECMDGOALS)),1) |
| 266 | mixed-targets := 1 |
| 267 | endif |
| 268 | endif |
| 269 | endif |
| 270 | |
| 271 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
| 272 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) |
| 273 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) |
| 274 | mixed-targets := 1 |
| 275 | endif |
| 276 | endif |
| 277 | |
| 278 | # install and modules_install need also be processed one by one |
| 279 | ifneq ($(filter install,$(MAKECMDGOALS)),) |
| 280 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
| 281 | mixed-targets := 1 |
| 282 | endif |
| 283 | endif |
| 284 | |
| 285 | ifeq ($(mixed-targets),1) |
| 286 | # =========================================================================== |
| 287 | # We're called with mixed targets (*config and build targets). |
| 288 | # Handle them one by one. |
| 289 | |
| 290 | PHONY += $(MAKECMDGOALS) __build_one_by_one |
| 291 | |
| 292 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one |
| 293 | @: |
| 294 | |
| 295 | __build_one_by_one: |
| 296 | $(Q)set -e; \ |
| 297 | for i in $(MAKECMDGOALS); do \ |
| 298 | $(MAKE) -f $(srctree)/Makefile $$i; \ |
| 299 | done |
| 300 | |
| 301 | else |
| 302 | |
| 303 | # We need some generic definitions (do not try to remake the file). |
| 304 | scripts/Kbuild.include: ; |
| 305 | include scripts/Kbuild.include |
| 306 | |
| 307 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
| 308 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| 309 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| 310 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| 311 | |
| 312 | include scripts/subarch.include |
| 313 | |
| 314 | # Cross compiling and selecting different set of gcc/bin-utils |
| 315 | # --------------------------------------------------------------------------- |
| 316 | # |
| 317 | # When performing cross compilation for other architectures ARCH shall be set |
| 318 | # to the target architecture. (See arch/* for the possibilities). |
| 319 | # ARCH can be set during invocation of make: |
| 320 | # make ARCH=ia64 |
| 321 | # Another way is to have ARCH set in the environment. |
| 322 | # The default ARCH is the host where make is executed. |
| 323 | |
| 324 | # CROSS_COMPILE specify the prefix used for all executables used |
| 325 | # during compilation. Only gcc and related bin-utils executables |
| 326 | # are prefixed with $(CROSS_COMPILE). |
| 327 | # CROSS_COMPILE can be set on the command line |
| 328 | # make CROSS_COMPILE=ia64-linux- |
| 329 | # Alternatively CROSS_COMPILE can be set in the environment. |
| 330 | # Default value for CROSS_COMPILE is not to prefix executables |
| 331 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| 332 | ARCH ?= $(SUBARCH) |
| 333 | |
| 334 | # Architecture as present in compile.h |
| 335 | UTS_MACHINE := $(ARCH) |
| 336 | SRCARCH := $(ARCH) |
| 337 | |
| 338 | # Additional ARCH settings for x86 |
| 339 | ifeq ($(ARCH),i386) |
| 340 | SRCARCH := x86 |
| 341 | endif |
| 342 | ifeq ($(ARCH),x86_64) |
| 343 | SRCARCH := x86 |
| 344 | endif |
| 345 | |
| 346 | # Additional ARCH settings for sparc |
| 347 | ifeq ($(ARCH),sparc32) |
| 348 | SRCARCH := sparc |
| 349 | endif |
| 350 | ifeq ($(ARCH),sparc64) |
| 351 | SRCARCH := sparc |
| 352 | endif |
| 353 | |
| 354 | # Additional ARCH settings for sh |
| 355 | ifeq ($(ARCH),sh64) |
| 356 | SRCARCH := sh |
| 357 | endif |
| 358 | |
| 359 | KCONFIG_CONFIG ?= .config |
| 360 | export KCONFIG_CONFIG |
| 361 | |
| 362 | # SHELL used by kbuild |
| 363 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
| 364 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
| 365 | else echo sh; fi ; fi) |
| 366 | |
| 367 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
| 368 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
| 369 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
| 370 | |
| 371 | HOSTCC = gcc |
| 372 | HOSTCXX = g++ |
| 373 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
| 374 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
| 375 | $(HOSTCFLAGS) |
| 376 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
| 377 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
| 378 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) |
| 379 | |
| 380 | # Make variables (CC, etc...) |
| 381 | AS = $(CROSS_COMPILE)as |
| 382 | LD = $(CROSS_COMPILE)ld |
| 383 | CC = $(CROSS_COMPILE)gcc |
| 384 | CPP = $(CC) -E |
| 385 | AR = $(CROSS_COMPILE)ar |
| 386 | NM = $(CROSS_COMPILE)nm |
| 387 | STRIP = $(CROSS_COMPILE)strip |
| 388 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| 389 | OBJDUMP = $(CROSS_COMPILE)objdump |
| 390 | LEX = flex |
| 391 | YACC = bison |
| 392 | AWK = awk |
| 393 | GENKSYMS = scripts/genksyms/genksyms |
| 394 | INSTALLKERNEL := installkernel |
| 395 | DEPMOD = /sbin/depmod |
| 396 | PERL = perl |
| 397 | PYTHON = python |
| 398 | PYTHON2 = python2 |
| 399 | PYTHON3 = python3 |
| 400 | CHECK = sparse |
| 401 | |
| 402 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| 403 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
| 404 | NOSTDINC_FLAGS = |
| 405 | CFLAGS_MODULE = |
| 406 | AFLAGS_MODULE = |
| 407 | LDFLAGS_MODULE = |
| 408 | CFLAGS_KERNEL = |
| 409 | AFLAGS_KERNEL = |
| 410 | LDFLAGS_vmlinux = |
| 411 | |
| 412 | # Use USERINCLUDE when you must reference the UAPI directories only. |
| 413 | USERINCLUDE := \ |
| 414 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
| 415 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
| 416 | -I$(srctree)/include/uapi \ |
| 417 | -I$(objtree)/include/generated/uapi \ |
| 418 | -include $(srctree)/include/linux/kconfig.h |
| 419 | |
| 420 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| 421 | # Needed to be compatible with the O= option |
| 422 | LINUXINCLUDE := \ |
| 423 | -I$(srctree)/arch/$(SRCARCH)/include \ |
| 424 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ |
| 425 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
| 426 | -I$(objtree)/include \ |
| 427 | $(USERINCLUDE) |
| 428 | |
| 429 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
| 430 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
| 431 | -fno-strict-aliasing -fno-common -fshort-wchar \ |
| 432 | -Werror-implicit-function-declaration \ |
| 433 | -Wno-format-security \ |
| 434 | -std=gnu89 |
| 435 | KBUILD_CPPFLAGS := -D__KERNEL__ |
| 436 | KBUILD_AFLAGS_KERNEL := |
| 437 | KBUILD_CFLAGS_KERNEL := |
| 438 | KBUILD_AFLAGS_MODULE := -DMODULE |
| 439 | KBUILD_CFLAGS_MODULE := -DMODULE |
| 440 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds |
| 441 | KBUILD_LDFLAGS := |
| 442 | GCC_PLUGINS_CFLAGS := |
| 443 | |
| 444 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
| 445 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
| 446 | export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
| 447 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| 448 | |
| 449 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
| 450 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| 451 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN |
| 452 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| 453 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| 454 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
| 455 | export KBUILD_ARFLAGS |
| 456 | |
| 457 | # When compiling out-of-tree modules, put MODVERDIR in the module |
| 458 | # tree rather than in the kernel tree. The kernel tree might |
| 459 | # even be read-only. |
| 460 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| 461 | |
| 462 | # Files to ignore in find ... statements |
| 463 | |
| 464 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
| 465 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
| 466 | -prune -o |
| 467 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| 468 | --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| 469 | |
| 470 | # =========================================================================== |
| 471 | # Rules shared between *config targets and build targets |
| 472 | |
| 473 | # Basic helpers built in scripts/basic/ |
| 474 | PHONY += scripts_basic |
| 475 | scripts_basic: |
| 476 | $(Q)$(MAKE) $(build)=scripts/basic |
| 477 | $(Q)rm -f .tmp_quiet_recordmcount |
| 478 | |
| 479 | # To avoid any implicit rule to kick in, define an empty command. |
| 480 | scripts/basic/%: scripts_basic ; |
| 481 | |
| 482 | PHONY += outputmakefile |
| 483 | # outputmakefile generates a Makefile in the output directory, if using a |
| 484 | # separate output directory. This allows convenient use of make in the |
| 485 | # output directory. |
| 486 | outputmakefile: |
| 487 | ifneq ($(KBUILD_SRC),) |
| 488 | $(Q)ln -fsn $(srctree) source |
| 489 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
| 490 | endif |
| 491 | |
| 492 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
| 493 | ifneq ($(CROSS_COMPILE),) |
| 494 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
| 495 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD))) |
| 496 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
| 497 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
| 498 | endif |
| 499 | ifneq ($(GCC_TOOLCHAIN),) |
| 500 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
| 501 | endif |
| 502 | CLANG_FLAGS += -no-integrated-as |
| 503 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
| 504 | KBUILD_AFLAGS += $(CLANG_FLAGS) |
| 505 | export CLANG_FLAGS |
| 506 | endif |
| 507 | |
| 508 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
| 509 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
| 510 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
| 511 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
| 512 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
| 513 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
| 514 | export RETPOLINE_CFLAGS |
| 515 | export RETPOLINE_VDSO_CFLAGS |
| 516 | |
| 517 | KBUILD_CFLAGS += $(call cc-option,-fno-PIE) |
| 518 | KBUILD_AFLAGS += $(call cc-option,-fno-PIE) |
| 519 | |
| 520 | # check for 'asm goto' |
| 521 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) |
| 522 | CC_HAVE_ASM_GOTO := 1 |
| 523 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO |
| 524 | KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO |
| 525 | endif |
| 526 | |
| 527 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
| 528 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. |
| 529 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), |
| 530 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. |
| 531 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) |
| 532 | |
| 533 | ifeq ($(config-targets),1) |
| 534 | # =========================================================================== |
| 535 | # *config targets only - make sure prerequisites are updated, and descend |
| 536 | # in scripts/kconfig to make the *config target |
| 537 | |
| 538 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| 539 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| 540 | # used for 'make defconfig' |
| 541 | include arch/$(SRCARCH)/Makefile |
| 542 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
| 543 | |
| 544 | config: scripts_basic outputmakefile FORCE |
| 545 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 546 | |
| 547 | %config: scripts_basic outputmakefile FORCE |
| 548 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 549 | |
| 550 | else |
| 551 | # =========================================================================== |
| 552 | # Build targets only - this includes vmlinux, arch specific targets, clean |
| 553 | # targets and others. In general all targets except *config targets. |
| 554 | |
| 555 | # If building an external module we do not care about the all: rule |
| 556 | # but instead _all depend on modules |
| 557 | PHONY += all |
| 558 | ifeq ($(KBUILD_EXTMOD),) |
| 559 | _all: all |
| 560 | else |
| 561 | _all: modules |
| 562 | endif |
| 563 | |
| 564 | # Decide whether to build built-in, modular, or both. |
| 565 | # Normally, just do built-in. |
| 566 | |
| 567 | KBUILD_MODULES := |
| 568 | KBUILD_BUILTIN := 1 |
| 569 | |
| 570 | # If we have only "make modules", don't compile built-in objects. |
| 571 | # When we're building modules with modversions, we need to consider |
| 572 | # the built-in objects during the descend as well, in order to |
| 573 | # make sure the checksums are up to date before we record them. |
| 574 | |
| 575 | ifeq ($(MAKECMDGOALS),modules) |
| 576 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
| 577 | endif |
| 578 | |
| 579 | # If we have "make <whatever> modules", compile modules |
| 580 | # in addition to whatever we do anyway. |
| 581 | # Just "make" or "make all" shall build modules as well |
| 582 | |
| 583 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| 584 | KBUILD_MODULES := 1 |
| 585 | endif |
| 586 | |
| 587 | ifeq ($(MAKECMDGOALS),) |
| 588 | KBUILD_MODULES := 1 |
| 589 | endif |
| 590 | |
| 591 | export KBUILD_MODULES KBUILD_BUILTIN |
| 592 | |
| 593 | ifeq ($(KBUILD_EXTMOD),) |
| 594 | # Objects we will link into vmlinux / subdirs we need to visit |
| 595 | init-y := init/ |
| 596 | drivers-y := drivers/ sound/ firmware/ |
| 597 | net-y := net/ |
| 598 | libs-y := lib/ |
| 599 | core-y := usr/ |
| 600 | virt-y := virt/ |
| 601 | endif # KBUILD_EXTMOD |
| 602 | |
| 603 | ifeq ($(dot-config),1) |
| 604 | include include/config/auto.conf |
| 605 | endif |
| 606 | |
| 607 | # The all: target is the default when no target is given on the |
| 608 | # command line. |
| 609 | # This allow a user to issue only 'make' to build a kernel including modules |
| 610 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
| 611 | all: vmlinux |
| 612 | |
| 613 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ |
| 614 | $(call cc-option,-fno-tree-loop-im) \ |
| 615 | $(call cc-disable-warning,maybe-uninitialized,) |
| 616 | export CFLAGS_GCOV |
| 617 | |
| 618 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
| 619 | ifdef CONFIG_FUNCTION_TRACER |
| 620 | CC_FLAGS_FTRACE := -pg |
| 621 | endif |
| 622 | |
| 623 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
| 624 | # values of the respective KBUILD_* variables |
| 625 | ARCH_CPPFLAGS := |
| 626 | ARCH_AFLAGS := |
| 627 | ARCH_CFLAGS := |
| 628 | include arch/$(SRCARCH)/Makefile |
| 629 | |
| 630 | ifeq ($(dot-config),1) |
| 631 | ifeq ($(may-sync-config),1) |
| 632 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
| 633 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile |
| 634 | # because some architectures define CROSS_COMPILE there. |
| 635 | -include include/config/auto.conf.cmd |
| 636 | |
| 637 | # To avoid any implicit rule to kick in, define an empty command |
| 638 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
| 639 | |
| 640 | # The actual configuration files used during the build are stored in |
| 641 | # include/generated/ and include/config/. Update them if .config is newer than |
| 642 | # include/config/auto.conf (which mirrors .config). |
| 643 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
| 644 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
| 645 | else |
| 646 | # External modules and some install targets need include/generated/autoconf.h |
| 647 | # and include/config/auto.conf but do not care if they are up-to-date. |
| 648 | # Use auto.conf to trigger the test |
| 649 | PHONY += include/config/auto.conf |
| 650 | |
| 651 | include/config/auto.conf: |
| 652 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
| 653 | echo >&2; \ |
| 654 | echo >&2 " ERROR: Kernel configuration is invalid."; \ |
| 655 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ |
| 656 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| 657 | echo >&2 ; \ |
| 658 | /bin/false) |
| 659 | |
| 660 | endif # may-sync-config |
| 661 | endif # $(dot-config) |
| 662 | |
| 663 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
| 664 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
| 665 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
| 666 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) |
| 667 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) |
| 668 | |
| 669 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| 670 | KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) |
| 671 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) |
| 672 | else |
| 673 | ifdef CONFIG_PROFILE_ALL_BRANCHES |
| 674 | KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
| 675 | else |
| 676 | KBUILD_CFLAGS += -O2 |
| 677 | endif |
| 678 | endif |
| 679 | |
| 680 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
| 681 | $(call cc-disable-warning,maybe-uninitialized,)) |
| 682 | |
| 683 | # Tell gcc to never replace conditional load with a non-conditional one |
| 684 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
| 685 | |
| 686 | include scripts/Makefile.kcov |
| 687 | include scripts/Makefile.gcc-plugins |
| 688 | |
| 689 | ifdef CONFIG_READABLE_ASM |
| 690 | # Disable optimizations that make assembler listings hard to read. |
| 691 | # reorder blocks reorders the control in the function |
| 692 | # ipa clone creates specialized cloned functions |
| 693 | # partial inlining inlines only parts of functions |
| 694 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ |
| 695 | $(call cc-option,-fno-ipa-cp-clone,) \ |
| 696 | $(call cc-option,-fno-partial-inlining) |
| 697 | endif |
| 698 | |
| 699 | ifneq ($(CONFIG_FRAME_WARN),0) |
| 700 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
| 701 | endif |
| 702 | |
| 703 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
| 704 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
| 705 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
| 706 | |
| 707 | KBUILD_CFLAGS += $(stackp-flags-y) |
| 708 | |
| 709 | ifdef CONFIG_CC_IS_CLANG |
| 710 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
| 711 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
| 712 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) |
| 713 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
| 714 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
| 715 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) |
| 716 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
| 717 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. |
| 718 | # See modpost pattern 2 |
| 719 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) |
| 720 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) |
| 721 | else |
| 722 | |
| 723 | # These warnings generated too much noise in a regular build. |
| 724 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) |
| 725 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
| 726 | endif |
| 727 | |
| 728 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
| 729 | ifdef CONFIG_FRAME_POINTER |
| 730 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| 731 | else |
| 732 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
| 733 | # pointers. For those, we don't have FUNCTION_TRACER automatically |
| 734 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is |
| 735 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use |
| 736 | # -fomit-frame-pointer with FUNCTION_TRACER. |
| 737 | ifndef CONFIG_FUNCTION_TRACER |
| 738 | KBUILD_CFLAGS += -fomit-frame-pointer |
| 739 | endif |
| 740 | endif |
| 741 | |
| 742 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
| 743 | |
| 744 | ifdef CONFIG_DEBUG_INFO |
| 745 | ifdef CONFIG_DEBUG_INFO_SPLIT |
| 746 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) |
| 747 | else |
| 748 | KBUILD_CFLAGS += -g |
| 749 | endif |
| 750 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
| 751 | endif |
| 752 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
| 753 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) |
| 754 | endif |
| 755 | |
| 756 | ifdef CONFIG_DEBUG_INFO_REDUCED |
| 757 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
| 758 | $(call cc-option,-fno-var-tracking) |
| 759 | endif |
| 760 | |
| 761 | ifdef CONFIG_FUNCTION_TRACER |
| 762 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| 763 | # gcc 5 supports generating the mcount tables directly |
| 764 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) |
| 765 | CC_FLAGS_FTRACE += -mrecord-mcount |
| 766 | export CC_USING_RECORD_MCOUNT := 1 |
| 767 | endif |
| 768 | ifdef CONFIG_HAVE_NOP_MCOUNT |
| 769 | ifeq ($(call cc-option-yn, -mnop-mcount),y) |
| 770 | CC_FLAGS_FTRACE += -mnop-mcount |
| 771 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| 772 | endif |
| 773 | endif |
| 774 | endif |
| 775 | ifdef CONFIG_HAVE_FENTRY |
| 776 | ifeq ($(call cc-option-yn, -mfentry),y) |
| 777 | CC_FLAGS_FTRACE += -mfentry |
| 778 | CC_FLAGS_USING += -DCC_USING_FENTRY |
| 779 | endif |
| 780 | endif |
| 781 | export CC_FLAGS_FTRACE |
| 782 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) |
| 783 | KBUILD_AFLAGS += $(CC_FLAGS_USING) |
| 784 | ifdef CONFIG_DYNAMIC_FTRACE |
| 785 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
| 786 | BUILD_C_RECORDMCOUNT := y |
| 787 | export BUILD_C_RECORDMCOUNT |
| 788 | endif |
| 789 | endif |
| 790 | endif |
| 791 | |
| 792 | # We trigger additional mismatches with less inlining |
| 793 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 794 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) |
| 795 | endif |
| 796 | |
| 797 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
| 798 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
| 799 | LDFLAGS_vmlinux += --gc-sections |
| 800 | endif |
| 801 | |
| 802 | # arch Makefile may override CC so keep this after arch Makefile is included |
| 803 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| 804 | |
| 805 | # warn about C99 declaration after statement |
| 806 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
| 807 | |
| 808 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
| 809 | KBUILD_CFLAGS += $(call cc-option,-Wvla) |
| 810 | |
| 811 | # disable pointer signed / unsigned warnings in gcc 4.0 |
| 812 | KBUILD_CFLAGS += -Wno-pointer-sign |
| 813 | |
| 814 | # disable stringop warnings in gcc 8+ |
| 815 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
| 816 | |
| 817 | # disable invalid "can't wrap" optimizations for signed / pointers |
| 818 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
| 819 | |
| 820 | # clang sets -fmerge-all-constants by default as optimization, but this |
| 821 | # is non-conforming behavior for C and in fact breaks the kernel, so we |
| 822 | # need to disable it here generally. |
| 823 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) |
| 824 | |
| 825 | # for gcc -fno-merge-all-constants disables everything, but it is fine |
| 826 | # to have actual conforming behavior enabled. |
| 827 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) |
| 828 | |
| 829 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
| 830 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) |
| 831 | |
| 832 | # conserve stack if available |
| 833 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) |
| 834 | |
| 835 | # disallow errors like 'EXPORT_GPL(foo);' with missing header |
| 836 | KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) |
| 837 | |
| 838 | # require functions to have arguments in prototypes, not empty 'int foo()' |
| 839 | KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) |
| 840 | |
| 841 | # Prohibit date/time macros, which would make the build non-deterministic |
| 842 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) |
| 843 | |
| 844 | # enforce correct pointer usage |
| 845 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) |
| 846 | |
| 847 | # Require designated initializers for all marked structures |
| 848 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) |
| 849 | |
| 850 | # change __FILE__ to the relative path from the srctree |
| 851 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| 852 | |
| 853 | # use the deterministic mode of AR if available |
| 854 | KBUILD_ARFLAGS := $(call ar-option,D) |
| 855 | |
| 856 | include scripts/Makefile.kasan |
| 857 | include scripts/Makefile.extrawarn |
| 858 | include scripts/Makefile.ubsan |
| 859 | |
| 860 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
| 861 | # last assignments |
| 862 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) |
| 863 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) |
| 864 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) |
| 865 | |
| 866 | # Use --build-id when available. |
| 867 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
| 868 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
| 869 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
| 870 | |
| 871 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
| 872 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
| 873 | endif |
| 874 | |
| 875 | # insure the checker run with the right endianness |
| 876 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) |
| 877 | |
| 878 | # the checker needs the correct machine size |
| 879 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) |
| 880 | |
| 881 | # Default kernel image to build when no specific target is given. |
| 882 | # KBUILD_IMAGE may be overruled on the command line or |
| 883 | # set in the environment |
| 884 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| 885 | # this default value |
| 886 | export KBUILD_IMAGE ?= vmlinux |
| 887 | |
| 888 | # |
| 889 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| 890 | # images. Default is /boot, but you can set it to other values |
| 891 | export INSTALL_PATH ?= /boot |
| 892 | |
| 893 | # |
| 894 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. |
| 895 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as |
| 896 | # an argument if needed. Otherwise it defaults to the kernel install path |
| 897 | # |
| 898 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) |
| 899 | |
| 900 | # |
| 901 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| 902 | # relocations required by build roots. This is not defined in the |
| 903 | # makefile but the argument can be passed to make if needed. |
| 904 | # |
| 905 | |
| 906 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| 907 | export MODLIB |
| 908 | |
| 909 | # |
| 910 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
| 911 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
| 912 | # the default option --strip-debug will be used. Otherwise, |
| 913 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. |
| 914 | |
| 915 | ifdef INSTALL_MOD_STRIP |
| 916 | ifeq ($(INSTALL_MOD_STRIP),1) |
| 917 | mod_strip_cmd = $(STRIP) --strip-debug |
| 918 | else |
| 919 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
| 920 | endif # INSTALL_MOD_STRIP=1 |
| 921 | else |
| 922 | mod_strip_cmd = true |
| 923 | endif # INSTALL_MOD_STRIP |
| 924 | export mod_strip_cmd |
| 925 | |
| 926 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
| 927 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP |
| 928 | # or CONFIG_MODULE_COMPRESS_XZ. |
| 929 | |
| 930 | mod_compress_cmd = true |
| 931 | ifdef CONFIG_MODULE_COMPRESS |
| 932 | ifdef CONFIG_MODULE_COMPRESS_GZIP |
| 933 | mod_compress_cmd = gzip -n -f |
| 934 | endif # CONFIG_MODULE_COMPRESS_GZIP |
| 935 | ifdef CONFIG_MODULE_COMPRESS_XZ |
| 936 | mod_compress_cmd = xz -f |
| 937 | endif # CONFIG_MODULE_COMPRESS_XZ |
| 938 | endif # CONFIG_MODULE_COMPRESS |
| 939 | export mod_compress_cmd |
| 940 | |
| 941 | # Select initial ramdisk compression format, default is gzip(1). |
| 942 | # This shall be used by the dracut(8) tool while creating an initramfs image. |
| 943 | # |
| 944 | INITRD_COMPRESS-y := gzip |
| 945 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 |
| 946 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma |
| 947 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz |
| 948 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo |
| 949 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 |
| 950 | # do not export INITRD_COMPRESS, since we didn't actually |
| 951 | # choose a sane default compression above. |
| 952 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) |
| 953 | |
| 954 | ifdef CONFIG_MODULE_SIG_ALL |
| 955 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
| 956 | |
| 957 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 |
| 958 | else |
| 959 | mod_sign_cmd = true |
| 960 | endif |
| 961 | export mod_sign_cmd |
| 962 | |
| 963 | ifdef CONFIG_STACK_VALIDATION |
| 964 | has_libelf := $(call try-run,\ |
| 965 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) |
| 966 | ifeq ($(has_libelf),1) |
| 967 | objtool_target := tools/objtool FORCE |
| 968 | else |
| 969 | ifdef CONFIG_UNWINDER_ORC |
| 970 | $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") |
| 971 | else |
| 972 | $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") |
| 973 | endif |
| 974 | SKIP_STACK_VALIDATION := 1 |
| 975 | export SKIP_STACK_VALIDATION |
| 976 | endif |
| 977 | endif |
| 978 | |
| 979 | |
| 980 | ifeq ($(KBUILD_EXTMOD),) |
| 981 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
| 982 | |
| 983 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ |
| 984 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| 985 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
| 986 | |
| 987 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ |
| 988 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
| 989 | |
| 990 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
| 991 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) |
| 992 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) |
| 993 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) |
| 994 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| 995 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
| 996 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) |
| 997 | |
| 998 | # Externally visible symbols (used by link-vmlinux.sh) |
| 999 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) |
| 1000 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) |
| 1001 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
| 1002 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
| 1003 | export LDFLAGS_vmlinux |
| 1004 | # used by scripts/package/Makefile |
| 1005 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
| 1006 | |
| 1007 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) |
| 1008 | |
| 1009 | # Recurse until adjust_autoksyms.sh is satisfied |
| 1010 | PHONY += autoksyms_recursive |
| 1011 | autoksyms_recursive: $(vmlinux-deps) |
| 1012 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| 1013 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
| 1014 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
| 1015 | endif |
| 1016 | |
| 1017 | # For the kernel to actually contain only the needed exported symbols, |
| 1018 | # we have to build modules as well to determine what those symbols are. |
| 1019 | # (this can be evaluated only once include/config/auto.conf has been included) |
| 1020 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| 1021 | KBUILD_MODULES := 1 |
| 1022 | endif |
| 1023 | |
| 1024 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
| 1025 | |
| 1026 | $(autoksyms_h): |
| 1027 | $(Q)mkdir -p $(dir $@) |
| 1028 | $(Q)touch $@ |
| 1029 | |
| 1030 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| 1031 | |
| 1032 | # Final link of vmlinux with optional arch pass after final link |
| 1033 | cmd_link-vmlinux = \ |
| 1034 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
| 1035 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| 1036 | |
| 1037 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
| 1038 | ifdef CONFIG_HEADERS_CHECK |
| 1039 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
| 1040 | endif |
| 1041 | ifdef CONFIG_GDB_SCRIPTS |
| 1042 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
| 1043 | endif |
| 1044 | +$(call if_changed,link-vmlinux) |
| 1045 | |
| 1046 | # Build samples along the rest of the kernel. This needs headers_install. |
| 1047 | ifdef CONFIG_SAMPLES |
| 1048 | vmlinux-dirs += samples |
| 1049 | samples: headers_install |
| 1050 | endif |
| 1051 | |
| 1052 | # The actual objects are generated when descending, |
| 1053 | # make sure no implicit rule kicks in |
| 1054 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
| 1055 | |
| 1056 | # Handle descending into subdirectories listed in $(vmlinux-dirs) |
| 1057 | # Preset locale variables to speed up the build process. Limit locale |
| 1058 | # tweaks to this spot to avoid wrong language settings when running |
| 1059 | # make menuconfig etc. |
| 1060 | # Error messages still appears in the original language |
| 1061 | |
| 1062 | PHONY += $(vmlinux-dirs) |
| 1063 | $(vmlinux-dirs): prepare scripts |
| 1064 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
| 1065 | |
| 1066 | define filechk_kernel.release |
| 1067 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| 1068 | endef |
| 1069 | |
| 1070 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
| 1071 | include/config/kernel.release: $(srctree)/Makefile FORCE |
| 1072 | $(call filechk,kernel.release) |
| 1073 | |
| 1074 | # Additional helpers built in scripts/ |
| 1075 | # Carefully list dependencies so we do not try to build scripts twice |
| 1076 | # in parallel |
| 1077 | PHONY += scripts |
| 1078 | scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h) |
| 1079 | $(Q)$(MAKE) $(build)=$(@) |
| 1080 | |
| 1081 | # Things we need to do before we recursively start building the kernel |
| 1082 | # or the modules are listed in "prepare". |
| 1083 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| 1084 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| 1085 | # version.h and scripts_basic is processed / created. |
| 1086 | |
| 1087 | # Listed in dependency order |
| 1088 | PHONY += prepare archprepare macroprepare prepare0 prepare1 prepare2 prepare3 |
| 1089 | |
| 1090 | # prepare3 is used to check if we are building in a separate output directory, |
| 1091 | # and if so do: |
| 1092 | # 1) Check that make has not been executed in the kernel src $(srctree) |
| 1093 | prepare3: include/config/kernel.release |
| 1094 | ifneq ($(KBUILD_SRC),) |
| 1095 | @$(kecho) ' Using $(srctree) as source for kernel' |
| 1096 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
| 1097 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
| 1098 | echo >&2 " in the '$(srctree)' directory.";\ |
| 1099 | /bin/false; \ |
| 1100 | fi; |
| 1101 | endif |
| 1102 | |
| 1103 | # prepare2 creates a makefile if using a separate output directory. |
| 1104 | # From this point forward, .config has been reprocessed, so any rules |
| 1105 | # that need to depend on updated CONFIG_* values can be checked here. |
| 1106 | prepare2: prepare3 outputmakefile asm-generic |
| 1107 | |
| 1108 | prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h |
| 1109 | $(cmd_crmodverdir) |
| 1110 | |
| 1111 | macroprepare: prepare1 archmacros |
| 1112 | |
| 1113 | archprepare: archheaders archscripts macroprepare scripts_basic |
| 1114 | |
| 1115 | prepare0: archprepare gcc-plugins |
| 1116 | $(Q)$(MAKE) $(build)=. |
| 1117 | |
| 1118 | # All the preparing.. |
| 1119 | prepare: prepare0 prepare-objtool |
| 1120 | |
| 1121 | # Support for using generic headers in asm-generic |
| 1122 | PHONY += asm-generic uapi-asm-generic |
| 1123 | asm-generic: uapi-asm-generic |
| 1124 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
| 1125 | src=asm obj=arch/$(SRCARCH)/include/generated/asm |
| 1126 | uapi-asm-generic: |
| 1127 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
| 1128 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm |
| 1129 | |
| 1130 | PHONY += prepare-objtool |
| 1131 | prepare-objtool: $(objtool_target) |
| 1132 | |
| 1133 | # Generate some files |
| 1134 | # --------------------------------------------------------------------------- |
| 1135 | |
| 1136 | # KERNELRELEASE can change from a few different places, meaning version.h |
| 1137 | # needs to be updated, so this check is forced on all builds |
| 1138 | |
| 1139 | uts_len := 64 |
| 1140 | define filechk_utsrelease.h |
| 1141 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| 1142 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| 1143 | exit 1; \ |
| 1144 | fi; \ |
| 1145 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) |
| 1146 | endef |
| 1147 | |
| 1148 | define filechk_version.h |
| 1149 | (echo \#define LINUX_VERSION_CODE $(shell \ |
| 1150 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
| 1151 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
| 1152 | endef |
| 1153 | |
| 1154 | $(version_h): FORCE |
| 1155 | $(call filechk,version.h) |
| 1156 | $(Q)rm -f $(old_version_h) |
| 1157 | |
| 1158 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
| 1159 | $(call filechk,utsrelease.h) |
| 1160 | |
| 1161 | PHONY += headerdep |
| 1162 | headerdep: |
| 1163 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
| 1164 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| 1165 | |
| 1166 | # --------------------------------------------------------------------------- |
| 1167 | # Kernel headers |
| 1168 | |
| 1169 | #Default location for installed headers |
| 1170 | export INSTALL_HDR_PATH = $(objtree)/usr |
| 1171 | |
| 1172 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
| 1173 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) |
| 1174 | |
| 1175 | PHONY += archheaders |
| 1176 | archheaders: |
| 1177 | |
| 1178 | PHONY += archscripts |
| 1179 | archscripts: |
| 1180 | |
| 1181 | PHONY += archmacros |
| 1182 | archmacros: |
| 1183 | |
| 1184 | PHONY += __headers |
| 1185 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
| 1186 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
| 1187 | |
| 1188 | PHONY += headers_install_all |
| 1189 | headers_install_all: |
| 1190 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install |
| 1191 | |
| 1192 | PHONY += headers_install |
| 1193 | headers_install: __headers |
| 1194 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
| 1195 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
| 1196 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
| 1197 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
| 1198 | |
| 1199 | PHONY += headers_check_all |
| 1200 | headers_check_all: headers_install_all |
| 1201 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
| 1202 | |
| 1203 | PHONY += headers_check |
| 1204 | headers_check: headers_install |
| 1205 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
| 1206 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
| 1207 | |
| 1208 | # --------------------------------------------------------------------------- |
| 1209 | # Kernel selftest |
| 1210 | |
| 1211 | PHONY += kselftest |
| 1212 | kselftest: |
| 1213 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
| 1214 | |
| 1215 | PHONY += kselftest-clean |
| 1216 | kselftest-clean: |
| 1217 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
| 1218 | |
| 1219 | PHONY += kselftest-merge |
| 1220 | kselftest-merge: |
| 1221 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) |
| 1222 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ |
| 1223 | -m $(objtree)/.config \ |
| 1224 | $(srctree)/tools/testing/selftests/*/config |
| 1225 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
| 1226 | |
| 1227 | # --------------------------------------------------------------------------- |
| 1228 | # Devicetree files |
| 1229 | |
| 1230 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) |
| 1231 | dtstree := arch/$(SRCARCH)/boot/dts |
| 1232 | endif |
| 1233 | |
| 1234 | ifneq ($(dtstree),) |
| 1235 | |
| 1236 | %.dtb: prepare3 scripts_dtc |
| 1237 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| 1238 | |
| 1239 | PHONY += dtbs dtbs_install |
| 1240 | dtbs: prepare3 scripts_dtc |
| 1241 | $(Q)$(MAKE) $(build)=$(dtstree) |
| 1242 | |
| 1243 | dtbs_install: |
| 1244 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) |
| 1245 | |
| 1246 | ifdef CONFIG_OF_EARLY_FLATTREE |
| 1247 | all: dtbs |
| 1248 | endif |
| 1249 | |
| 1250 | endif |
| 1251 | |
| 1252 | PHONY += scripts_dtc |
| 1253 | scripts_dtc: scripts_basic |
| 1254 | $(Q)$(MAKE) $(build)=scripts/dtc |
| 1255 | |
| 1256 | # --------------------------------------------------------------------------- |
| 1257 | # Modules |
| 1258 | |
| 1259 | ifdef CONFIG_MODULES |
| 1260 | |
| 1261 | # By default, build modules as well |
| 1262 | |
| 1263 | all: modules |
| 1264 | |
| 1265 | # Build modules |
| 1266 | # |
| 1267 | # A module can be listed more than once in obj-m resulting in |
| 1268 | # duplicate lines in modules.order files. Those are removed |
| 1269 | # using awk while concatenating to the final file. |
| 1270 | |
| 1271 | PHONY += modules |
| 1272 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
| 1273 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
| 1274 | @$(kecho) ' Building modules, stage 2.'; |
| 1275 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| 1276 | |
| 1277 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
| 1278 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin |
| 1279 | |
| 1280 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
| 1281 | $(Q)$(MAKE) $(modbuiltin)=$* |
| 1282 | |
| 1283 | |
| 1284 | # Target to prepare building external modules |
| 1285 | PHONY += modules_prepare |
| 1286 | modules_prepare: prepare scripts |
| 1287 | |
| 1288 | # Target to install modules |
| 1289 | PHONY += modules_install |
| 1290 | modules_install: _modinst_ _modinst_post |
| 1291 | |
| 1292 | PHONY += _modinst_ |
| 1293 | _modinst_: |
| 1294 | @rm -rf $(MODLIB)/kernel |
| 1295 | @rm -f $(MODLIB)/source |
| 1296 | @mkdir -p $(MODLIB)/kernel |
| 1297 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
| 1298 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| 1299 | rm -f $(MODLIB)/build ; \ |
| 1300 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
| 1301 | fi |
| 1302 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
| 1303 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
| 1304 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| 1305 | |
| 1306 | # This depmod is only for convenience to give the initial |
| 1307 | # boot a modules.dep even before / is mounted read-write. However the |
| 1308 | # boot script depmod is the master version. |
| 1309 | PHONY += _modinst_post |
| 1310 | _modinst_post: _modinst_ |
| 1311 | $(call cmd,depmod) |
| 1312 | |
| 1313 | ifeq ($(CONFIG_MODULE_SIG), y) |
| 1314 | PHONY += modules_sign |
| 1315 | modules_sign: |
| 1316 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign |
| 1317 | endif |
| 1318 | |
| 1319 | else # CONFIG_MODULES |
| 1320 | |
| 1321 | # Modules not configured |
| 1322 | # --------------------------------------------------------------------------- |
| 1323 | |
| 1324 | PHONY += modules modules_install |
| 1325 | modules modules_install: |
| 1326 | @echo >&2 |
| 1327 | @echo >&2 "The present kernel configuration has modules disabled." |
| 1328 | @echo >&2 "Type 'make config' and enable loadable module support." |
| 1329 | @echo >&2 "Then build a kernel with module support enabled." |
| 1330 | @echo >&2 |
| 1331 | @exit 1 |
| 1332 | |
| 1333 | endif # CONFIG_MODULES |
| 1334 | |
| 1335 | ### |
| 1336 | # Cleaning is done on three levels. |
| 1337 | # make clean Delete most generated files |
| 1338 | # Leave enough to build external modules |
| 1339 | # make mrproper Delete the current configuration, and all generated files |
| 1340 | # make distclean Remove editor backup files, patch leftover files and the like |
| 1341 | |
| 1342 | # Directories & files removed with 'make clean' |
| 1343 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
| 1344 | |
| 1345 | # Directories & files removed with 'make mrproper' |
| 1346 | MRPROPER_DIRS += include/config usr/include include/generated \ |
| 1347 | arch/*/include/generated .tmp_objdiff |
| 1348 | MRPROPER_FILES += .config .config.old .version \ |
| 1349 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
| 1350 | signing_key.pem signing_key.priv signing_key.x509 \ |
| 1351 | x509.genkey extra_certificates signing_key.x509.keyid \ |
| 1352 | signing_key.x509.signer vmlinux-gdb.py |
| 1353 | |
| 1354 | # clean - Delete most, but leave enough to build external modules |
| 1355 | # |
| 1356 | clean: rm-dirs := $(CLEAN_DIRS) |
| 1357 | clean: rm-files := $(CLEAN_FILES) |
| 1358 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
| 1359 | |
| 1360 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
| 1361 | $(clean-dirs): |
| 1362 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| 1363 | |
| 1364 | vmlinuxclean: |
| 1365 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
| 1366 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
| 1367 | |
| 1368 | clean: archclean vmlinuxclean |
| 1369 | |
| 1370 | # mrproper - Delete all generated files, including .config |
| 1371 | # |
| 1372 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| 1373 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| 1374 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
| 1375 | |
| 1376 | PHONY += $(mrproper-dirs) mrproper archmrproper |
| 1377 | $(mrproper-dirs): |
| 1378 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| 1379 | |
| 1380 | mrproper: clean archmrproper $(mrproper-dirs) |
| 1381 | $(call cmd,rmdirs) |
| 1382 | $(call cmd,rmfiles) |
| 1383 | |
| 1384 | # distclean |
| 1385 | # |
| 1386 | PHONY += distclean |
| 1387 | |
| 1388 | distclean: mrproper |
| 1389 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
| 1390 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| 1391 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
| 1392 | -o -name 'core' \) \ |
| 1393 | -type f -print | xargs rm -f |
| 1394 | |
| 1395 | |
| 1396 | # Packaging of the kernel to various formats |
| 1397 | # --------------------------------------------------------------------------- |
| 1398 | package-dir := scripts/package |
| 1399 | |
| 1400 | %src-pkg: FORCE |
| 1401 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| 1402 | %pkg: include/config/kernel.release FORCE |
| 1403 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| 1404 | |
| 1405 | |
| 1406 | # Brief documentation of the typical targets used |
| 1407 | # --------------------------------------------------------------------------- |
| 1408 | |
| 1409 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| 1410 | boards := $(sort $(notdir $(boards))) |
| 1411 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| 1412 | board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| 1413 | |
| 1414 | PHONY += help |
| 1415 | help: |
| 1416 | @echo 'Cleaning targets:' |
| 1417 | @echo ' clean - Remove most generated files but keep the config and' |
| 1418 | @echo ' enough build support to build external modules' |
| 1419 | @echo ' mrproper - Remove all generated files + config + various backup files' |
| 1420 | @echo ' distclean - mrproper + remove editor backup and patch files' |
| 1421 | @echo '' |
| 1422 | @echo 'Configuration targets:' |
| 1423 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| 1424 | @echo '' |
| 1425 | @echo 'Other generic targets:' |
| 1426 | @echo ' all - Build all targets marked with [*]' |
| 1427 | @echo '* vmlinux - Build the bare kernel' |
| 1428 | @echo '* modules - Build all modules' |
| 1429 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| 1430 | @echo ' dir/ - Build all files in dir and below' |
| 1431 | @echo ' dir/file.[ois] - Build specified target only' |
| 1432 | @echo ' dir/file.ll - Build the LLVM assembly file' |
| 1433 | @echo ' (requires compiler support for LLVM assembly generation)' |
| 1434 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| 1435 | @echo ' (requires a recent binutils and recent build (System.map))' |
| 1436 | @echo ' dir/file.ko - Build module including final link' |
| 1437 | @echo ' modules_prepare - Set up for building external modules' |
| 1438 | @echo ' tags/TAGS - Generate tags file for editors' |
| 1439 | @echo ' cscope - Generate cscope index' |
| 1440 | @echo ' gtags - Generate GNU GLOBAL index' |
| 1441 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
| 1442 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
| 1443 | @echo ' image_name - Output the image name (use with make -s)' |
| 1444 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| 1445 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| 1446 | echo '' |
| 1447 | @echo 'Static analysers:' |
| 1448 | @echo ' checkstack - Generate a list of stack hogs' |
| 1449 | @echo ' namespacecheck - Name space analysis on compiled kernel' |
| 1450 | @echo ' versioncheck - Sanity check on version.h usage' |
| 1451 | @echo ' includecheck - Check for duplicate included header files' |
| 1452 | @echo ' export_report - List the usages of all exported symbols' |
| 1453 | @echo ' headers_check - Sanity check on exported headers' |
| 1454 | @echo ' headerdep - Detect inclusion cycles in headers' |
| 1455 | @echo ' coccicheck - Check with Coccinelle' |
| 1456 | @echo '' |
| 1457 | @echo 'Kernel selftest:' |
| 1458 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
| 1459 | @echo ' Build, install, and boot kernel before' |
| 1460 | @echo ' running kselftest on it' |
| 1461 | @echo ' kselftest-clean - Remove all generated kselftest files' |
| 1462 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
| 1463 | @echo ' .config.' |
| 1464 | @echo '' |
| 1465 | @$(if $(dtstree), \ |
| 1466 | echo 'Devicetree:'; \ |
| 1467 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
| 1468 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ |
| 1469 | echo '') |
| 1470 | |
| 1471 | @echo 'Userspace tools targets:' |
| 1472 | @echo ' use "make tools/help"' |
| 1473 | @echo ' or "cd tools; make help"' |
| 1474 | @echo '' |
| 1475 | @echo 'Kernel packaging:' |
| 1476 | @$(MAKE) $(build)=$(package-dir) help |
| 1477 | @echo '' |
| 1478 | @echo 'Documentation targets:' |
| 1479 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
| 1480 | @echo '' |
| 1481 | @echo 'Architecture specific targets ($(SRCARCH)):' |
| 1482 | @$(if $(archhelp),$(archhelp),\ |
| 1483 | echo ' No architecture specific help defined for $(SRCARCH)') |
| 1484 | @echo '' |
| 1485 | @$(if $(boards), \ |
| 1486 | $(foreach b, $(boards), \ |
| 1487 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| 1488 | echo '') |
| 1489 | @$(if $(board-dirs), \ |
| 1490 | $(foreach b, $(board-dirs), \ |
| 1491 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| 1492 | printf " %-16s - Show all of the above\\n" help-boards; \ |
| 1493 | echo '') |
| 1494 | |
| 1495 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| 1496 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| 1497 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| 1498 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
| 1499 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| 1500 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
| 1501 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
| 1502 | @echo ' 1: warnings which may be relevant and do not occur too often' |
| 1503 | @echo ' 2: warnings which occur quite often but may still be relevant' |
| 1504 | @echo ' 3: more obscure warnings, can most likely be ignored' |
| 1505 | @echo ' Multiple levels can be combined with W=12 or W=123' |
| 1506 | @echo '' |
| 1507 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| 1508 | @echo 'For further info see the ./README file' |
| 1509 | |
| 1510 | |
| 1511 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
| 1512 | |
| 1513 | help-boards: $(help-board-dirs) |
| 1514 | |
| 1515 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
| 1516 | |
| 1517 | $(help-board-dirs): help-%: |
| 1518 | @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| 1519 | @$(if $(boards-per-dir), \ |
| 1520 | $(foreach b, $(boards-per-dir), \ |
| 1521 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| 1522 | echo '') |
| 1523 | |
| 1524 | |
| 1525 | # Documentation targets |
| 1526 | # --------------------------------------------------------------------------- |
| 1527 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
| 1528 | linkcheckdocs dochelp refcheckdocs |
| 1529 | PHONY += $(DOC_TARGETS) |
| 1530 | $(DOC_TARGETS): scripts_basic FORCE |
| 1531 | $(Q)$(MAKE) $(build)=Documentation $@ |
| 1532 | |
| 1533 | else # KBUILD_EXTMOD |
| 1534 | |
| 1535 | ### |
| 1536 | # External module support. |
| 1537 | # When building external modules the kernel used as basis is considered |
| 1538 | # read-only, and no consistency checks are made and the make |
| 1539 | # system is not used on the basis kernel. If updates are required |
| 1540 | # in the basis kernel ordinary make commands (without M=...) must |
| 1541 | # be used. |
| 1542 | # |
| 1543 | # The following are the only valid targets when building external |
| 1544 | # modules. |
| 1545 | # make M=dir clean Delete all automatically generated files |
| 1546 | # make M=dir modules Make all modules in specified dir |
| 1547 | # make M=dir Same as 'make M=dir modules' |
| 1548 | # make M=dir modules_install |
| 1549 | # Install the modules built in the module directory |
| 1550 | # Assumes install directory is already created |
| 1551 | |
| 1552 | # We are always building modules |
| 1553 | KBUILD_MODULES := 1 |
| 1554 | |
| 1555 | PHONY += $(objtree)/Module.symvers |
| 1556 | $(objtree)/Module.symvers: |
| 1557 | @test -e $(objtree)/Module.symvers || ( \ |
| 1558 | echo; \ |
| 1559 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
| 1560 | echo " is missing; modules will have no dependencies and modversions."; \ |
| 1561 | echo ) |
| 1562 | |
| 1563 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
| 1564 | PHONY += $(module-dirs) modules |
| 1565 | $(module-dirs): prepare $(objtree)/Module.symvers |
| 1566 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
| 1567 | |
| 1568 | modules: $(module-dirs) |
| 1569 | @$(kecho) ' Building modules, stage 2.'; |
| 1570 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| 1571 | |
| 1572 | PHONY += modules_install |
| 1573 | modules_install: _emodinst_ _emodinst_post |
| 1574 | |
| 1575 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
| 1576 | PHONY += _emodinst_ |
| 1577 | _emodinst_: |
| 1578 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
| 1579 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| 1580 | |
| 1581 | PHONY += _emodinst_post |
| 1582 | _emodinst_post: _emodinst_ |
| 1583 | $(call cmd,depmod) |
| 1584 | |
| 1585 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
| 1586 | |
| 1587 | PHONY += $(clean-dirs) clean |
| 1588 | $(clean-dirs): |
| 1589 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| 1590 | |
| 1591 | clean: rm-dirs := $(MODVERDIR) |
| 1592 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
| 1593 | |
| 1594 | PHONY += help |
| 1595 | help: |
| 1596 | @echo ' Building external modules.' |
| 1597 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| 1598 | @echo '' |
| 1599 | @echo ' modules - default target, build the module(s)' |
| 1600 | @echo ' modules_install - install the module' |
| 1601 | @echo ' clean - remove generated files in module directory only' |
| 1602 | @echo '' |
| 1603 | |
| 1604 | # Dummies... |
| 1605 | PHONY += prepare scripts |
| 1606 | prepare: |
| 1607 | $(cmd_crmodverdir) |
| 1608 | scripts: ; |
| 1609 | endif # KBUILD_EXTMOD |
| 1610 | |
| 1611 | clean: $(clean-dirs) |
| 1612 | $(call cmd,rmdirs) |
| 1613 | $(call cmd,rmfiles) |
| 1614 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| 1615 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
| 1616 | -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ |
| 1617 | -o -name '*.dwo' -o -name '*.lst' \ |
| 1618 | -o -name '*.su' \ |
| 1619 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| 1620 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
| 1621 | -o -name '*.asn1.[ch]' \ |
| 1622 | -o -name '*.symtypes' -o -name 'modules.order' \ |
| 1623 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ |
| 1624 | -o -name '*.c.[012]*.*' \ |
| 1625 | -o -name '*.ll' \ |
| 1626 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
| 1627 | |
| 1628 | # Generate tags for editors |
| 1629 | # --------------------------------------------------------------------------- |
| 1630 | quiet_cmd_tags = GEN $@ |
| 1631 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ |
| 1632 | |
| 1633 | tags TAGS cscope gtags: FORCE |
| 1634 | $(call cmd,tags) |
| 1635 | |
| 1636 | # Scripts to check various things for consistency |
| 1637 | # --------------------------------------------------------------------------- |
| 1638 | |
| 1639 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
| 1640 | |
| 1641 | includecheck: |
| 1642 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| 1643 | -name '*.[hcS]' -type f -print | sort \ |
| 1644 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
| 1645 | |
| 1646 | versioncheck: |
| 1647 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| 1648 | -name '*.[hcS]' -type f -print | sort \ |
| 1649 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
| 1650 | |
| 1651 | coccicheck: |
| 1652 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ |
| 1653 | |
| 1654 | namespacecheck: |
| 1655 | $(PERL) $(srctree)/scripts/namespace.pl |
| 1656 | |
| 1657 | export_report: |
| 1658 | $(PERL) $(srctree)/scripts/export_report.pl |
| 1659 | |
| 1660 | PHONY += checkstack kernelrelease kernelversion image_name |
| 1661 | |
| 1662 | # UML needs a little special treatment here. It wants to use the host |
| 1663 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| 1664 | # else wants $(ARCH), including people doing cross-builds, which means |
| 1665 | # that $(SUBARCH) doesn't work here. |
| 1666 | ifeq ($(ARCH), um) |
| 1667 | CHECKSTACK_ARCH := $(SUBARCH) |
| 1668 | else |
| 1669 | CHECKSTACK_ARCH := $(ARCH) |
| 1670 | endif |
| 1671 | checkstack: |
| 1672 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| 1673 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| 1674 | |
| 1675 | kernelrelease: |
| 1676 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| 1677 | |
| 1678 | kernelversion: |
| 1679 | @echo $(KERNELVERSION) |
| 1680 | |
| 1681 | image_name: |
| 1682 | @echo $(KBUILD_IMAGE) |
| 1683 | |
| 1684 | # Clear a bunch of variables before executing the submake |
| 1685 | tools/: FORCE |
| 1686 | $(Q)mkdir -p $(objtree)/tools |
| 1687 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ |
| 1688 | |
| 1689 | tools/%: FORCE |
| 1690 | $(Q)mkdir -p $(objtree)/tools |
| 1691 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
| 1692 | |
| 1693 | # Single targets |
| 1694 | # --------------------------------------------------------------------------- |
| 1695 | # Single targets are compatible with: |
| 1696 | # - build with mixed source and output |
| 1697 | # - build with separate output dir 'make O=...' |
| 1698 | # - external modules |
| 1699 | # |
| 1700 | # target-dir => where to store outputfile |
| 1701 | # build-dir => directory in kernel source tree to use |
| 1702 | |
| 1703 | ifeq ($(KBUILD_EXTMOD),) |
| 1704 | build-dir = $(patsubst %/,%,$(dir $@)) |
| 1705 | target-dir = $(dir $@) |
| 1706 | else |
| 1707 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
| 1708 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
| 1709 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
| 1710 | endif |
| 1711 | |
| 1712 | %.s: %.c prepare scripts FORCE |
| 1713 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1714 | %.i: %.c prepare scripts FORCE |
| 1715 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1716 | %.o: %.c prepare scripts FORCE |
| 1717 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1718 | %.lst: %.c prepare scripts FORCE |
| 1719 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1720 | %.s: %.S prepare scripts FORCE |
| 1721 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1722 | %.o: %.S prepare scripts FORCE |
| 1723 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1724 | %.symtypes: %.c prepare scripts FORCE |
| 1725 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1726 | %.ll: %.c prepare scripts FORCE |
| 1727 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| 1728 | |
| 1729 | # Modules |
| 1730 | /: prepare scripts FORCE |
| 1731 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1732 | $(build)=$(build-dir) |
| 1733 | # Make sure the latest headers are built for Documentation |
| 1734 | Documentation/ samples/: headers_install |
| 1735 | %/: prepare scripts FORCE |
| 1736 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1737 | $(build)=$(build-dir) |
| 1738 | %.ko: prepare scripts FORCE |
| 1739 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| 1740 | $(build)=$(build-dir) $(@:.ko=.o) |
| 1741 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| 1742 | |
| 1743 | # FIXME Should go into a make.lib or something |
| 1744 | # =========================================================================== |
| 1745 | |
| 1746 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| 1747 | cmd_rmdirs = rm -rf $(rm-dirs) |
| 1748 | |
| 1749 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| 1750 | cmd_rmfiles = rm -f $(rm-files) |
| 1751 | |
| 1752 | # Run depmod only if we have System.map and depmod is executable |
| 1753 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| 1754 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| 1755 | $(KERNELRELEASE) |
| 1756 | |
| 1757 | # Create temporary dir for module support files |
| 1758 | # clean it up only when building all modules |
| 1759 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ |
| 1760 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) |
| 1761 | |
| 1762 | # read all saved command lines |
| 1763 | cmd_files := $(wildcard .*.cmd) |
| 1764 | |
| 1765 | ifneq ($(cmd_files),) |
| 1766 | $(cmd_files): ; # Do not try to update included dependency files |
| 1767 | include $(cmd_files) |
| 1768 | endif |
| 1769 | |
| 1770 | endif # ifeq ($(config-targets),1) |
| 1771 | endif # ifeq ($(mixed-targets),1) |
| 1772 | endif # skip-makefile |
| 1773 | |
| 1774 | PHONY += FORCE |
| 1775 | FORCE: |
| 1776 | |
| 1777 | # Declare the contents of the PHONY variable as phony. We keep that |
| 1778 | # information in a variable so we can use it in if_changed and friends. |
| 1779 | .PHONY: $(PHONY) |