| | 1 | # SPDX-License-Identifier: GPL-2.0 |
| | 2 | VERSION = 5 |
| | 3 | PATCHLEVEL = 1 |
| | 4 | SUBLEVEL = 0 |
| | 5 | EXTRAVERSION = -rc1 |
| | 6 | NAME = Shy Crocodile |
| | 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 | # We are using a recursive build, so we need to do a little thinking |
| | 19 | # to get the ordering right. |
| | 20 | # |
| | 21 | # Most importantly: sub-Makefiles should only ever modify files in |
| | 22 | # their own directory. If in some directory we have a dependency on |
| | 23 | # a file in another dir (which doesn't happen often, but it's often |
| | 24 | # unavoidable when linking the built-in.a targets which finally |
| | 25 | # turn into vmlinux), we will call a sub make in that other dir, and |
| | 26 | # after that we are sure that everything which is in that other dir |
| | 27 | # is now up to date. |
| | 28 | # |
| | 29 | # The only cases where we need to modify files which have global |
| | 30 | # effects are thus separated out and done before the recursive |
| | 31 | # descending is started. They are now explicitly listed as the |
| | 32 | # prepare rule. |
| | 33 | |
| | 34 | ifneq ($(sub-make-done),1) |
| | 35 | |
| | 36 | # Do not use make's built-in rules and variables |
| | 37 | # (this increases performance and avoids hard-to-debug behaviour) |
| | 38 | MAKEFLAGS += -rR |
| | 39 | |
| | 40 | # Avoid funny character set dependencies |
| | 41 | unexport LC_ALL |
| | 42 | LC_COLLATE=C |
| | 43 | LC_NUMERIC=C |
| | 44 | export LC_COLLATE LC_NUMERIC |
| | 45 | |
| | 46 | # Avoid interference with shell env settings |
| | 47 | unexport GREP_OPTIONS |
| | 48 | |
| | 49 | # Beautify output |
| | 50 | # --------------------------------------------------------------------------- |
| | 51 | # |
| | 52 | # Normally, we echo the whole command before executing it. By making |
| | 53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| | 54 | # $(quiet) to choose other forms of output instead, e.g. |
| | 55 | # |
| | 56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| | 57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| | 58 | # |
| | 59 | # If $(quiet) is empty, the whole command will be printed. |
| | 60 | # If it is set to "quiet_", only the short version will be printed. |
| | 61 | # If it is set to "silent_", nothing will be printed at all, since |
| | 62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| | 63 | # |
| | 64 | # A simple variant is to prefix commands with $(Q) - that's useful |
| | 65 | # for commands that shall be hidden in non-verbose mode. |
| | 66 | # |
| | 67 | # $(Q)ln $@ :< |
| | 68 | # |
| | 69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| | 70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| | 71 | # |
| | 72 | # To put more focus on warnings, be less verbose as default |
| | 73 | # Use 'make V=1' to see the full commands |
| | 74 | |
| | 75 | ifeq ("$(origin V)", "command line") |
| | 76 | KBUILD_VERBOSE = $(V) |
| | 77 | endif |
| | 78 | ifndef KBUILD_VERBOSE |
| | 79 | KBUILD_VERBOSE = 0 |
| | 80 | endif |
| | 81 | |
| | 82 | ifeq ($(KBUILD_VERBOSE),1) |
| | 83 | quiet = |
| | 84 | Q = |
| | 85 | else |
| | 86 | quiet=quiet_ |
| | 87 | Q = @ |
| | 88 | endif |
| | 89 | |
| | 90 | # If the user is running make -s (silent mode), suppress echoing of |
| | 91 | # commands |
| | 92 | |
| | 93 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
| | 94 | quiet=silent_ |
| | 95 | endif |
| | 96 | |
| | 97 | export quiet Q KBUILD_VERBOSE |
| | 98 | |
| | 99 | # kbuild supports saving output files in a separate directory. |
| | 100 | # To locate output files in a separate directory two syntaxes are supported. |
| | 101 | # In both cases the working directory must be the root of the kernel src. |
| | 102 | # 1) O= |
| | 103 | # Use "make O=dir/to/store/output/files/" |
| | 104 | # |
| | 105 | # 2) Set KBUILD_OUTPUT |
| | 106 | # Set the environment variable KBUILD_OUTPUT to point to the directory |
| | 107 | # where the output files shall be placed. |
| | 108 | # export KBUILD_OUTPUT=dir/to/store/output/files/ |
| | 109 | # make |
| | 110 | # |
| | 111 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| | 112 | # variable. |
| | 113 | |
| | 114 | # KBUILD_SRC is not intended to be used by the regular user (for now), |
| | 115 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. |
| | 116 | |
| | 117 | # OK, Make called in directory where kernel src resides |
| | 118 | # Do we want to locate output files in a separate directory? |
| | 119 | ifeq ("$(origin O)", "command line") |
| | 120 | KBUILD_OUTPUT := $(O) |
| | 121 | endif |
| | 122 | |
| | 123 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
| | 124 | $(error main directory cannot contain spaces nor colons) |
| | 125 | endif |
| | 126 | |
| | 127 | ifneq ($(KBUILD_OUTPUT),) |
| | 128 | # check that the output directory actually exists |
| | 129 | saved-output := $(KBUILD_OUTPUT) |
| | 130 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
| | 131 | && pwd) |
| | 132 | $(if $(KBUILD_OUTPUT),, \ |
| | 133 | $(error failed to create output directory "$(saved-output)")) |
| | 134 | |
| | 135 | # Look for make include files relative to root of kernel src |
| | 136 | # |
| | 137 | # This does not become effective immediately because MAKEFLAGS is re-parsed |
| | 138 | # once after the Makefile is read. It is OK since we are going to invoke |
| | 139 | # 'sub-make' below. |
| | 140 | MAKEFLAGS += --include-dir=$(CURDIR) |
| | 141 | |
| | 142 | need-sub-make := 1 |
| | 143 | else |
| | 144 | |
| | 145 | # Do not print "Entering directory ..." at all for in-tree build. |
| | 146 | MAKEFLAGS += --no-print-directory |
| | 147 | |
| | 148 | endif # ifneq ($(KBUILD_OUTPUT),) |
| | 149 | |
| | 150 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
| | 151 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x |
| | 152 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. |
| | 153 | need-sub-make := 1 |
| | 154 | # Cancel implicit rules for this Makefile. |
| | 155 | $(lastword $(MAKEFILE_LIST)): ; |
| | 156 | endif |
| | 157 | |
| | 158 | ifeq ($(need-sub-make),1) |
| | 159 | |
| | 160 | PHONY += $(MAKECMDGOALS) sub-make |
| | 161 | |
| | 162 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
| | 163 | @: |
| | 164 | |
| | 165 | # Invoke a second make in the output directory, passing relevant variables |
| | 166 | sub-make: |
| | 167 | $(Q)$(MAKE) sub-make-done=1 \ |
| | 168 | $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ |
| | 169 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
| | 170 | |
| | 171 | endif # need-sub-make |
| | 172 | endif # sub-make-done |
| | 173 | |
| | 174 | # We process the rest of the Makefile if this is the final invocation of make |
| | 175 | ifeq ($(need-sub-make),) |
| | 176 | |
| | 177 | # Do not print "Entering directory ...", |
| | 178 | # but we want to display it when entering to the output directory |
| | 179 | # so that IDEs/editors are able to understand relative filenames. |
| | 180 | MAKEFLAGS += --no-print-directory |
| | 181 | |
| | 182 | # Call a source code checker (by default, "sparse") as part of the |
| | 183 | # C compilation. |
| | 184 | # |
| | 185 | # Use 'make C=1' to enable checking of only re-compiled files. |
| | 186 | # Use 'make C=2' to enable checking of *all* source files, regardless |
| | 187 | # of whether they are re-compiled or not. |
| | 188 | # |
| | 189 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
| | 190 | # including where to get the "sparse" utility. |
| | 191 | |
| | 192 | ifeq ("$(origin C)", "command line") |
| | 193 | KBUILD_CHECKSRC = $(C) |
| | 194 | endif |
| | 195 | ifndef KBUILD_CHECKSRC |
| | 196 | KBUILD_CHECKSRC = 0 |
| | 197 | endif |
| | 198 | |
| | 199 | # Use make M=dir to specify directory of external module to build |
| | 200 | # Old syntax make ... SUBDIRS=$PWD is still supported |
| | 201 | # Setting the environment variable KBUILD_EXTMOD take precedence |
| | 202 | ifdef SUBDIRS |
| | 203 | $(warning ================= WARNING ================) |
| | 204 | $(warning 'SUBDIRS' will be removed after Linux 5.3) |
| | 205 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) |
| | 206 | $(warning ==========================================) |
| | 207 | KBUILD_EXTMOD ?= $(SUBDIRS) |
| | 208 | endif |
| | 209 | |
| | 210 | ifeq ("$(origin M)", "command line") |
| | 211 | KBUILD_EXTMOD := $(M) |
| | 212 | endif |
| | 213 | |
| | 214 | ifeq ($(KBUILD_SRC),) |
| | 215 | # building in the source tree |
| | 216 | srctree := . |
| | 217 | else |
| | 218 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) |
| | 219 | # building in a subdirectory of the source tree |
| | 220 | srctree := .. |
| | 221 | else |
| | 222 | srctree := $(KBUILD_SRC) |
| | 223 | endif |
| | 224 | endif |
| | 225 | |
| | 226 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC |
| | 227 | |
| | 228 | objtree := . |
| | 229 | src := $(srctree) |
| | 230 | obj := $(objtree) |
| | 231 | |
| | 232 | VPATH := $(srctree) |
| | 233 | |
| | 234 | export srctree objtree VPATH |
| | 235 | |
| | 236 | # To make sure we do not include .config for any of the *config targets |
| | 237 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| | 238 | # It is allowed to specify more targets when calling make, including |
| | 239 | # mixing *config targets and build targets. |
| | 240 | # For example 'make oldconfig all'. |
| | 241 | # Detect when mixed targets is specified, and make a second invocation |
| | 242 | # of make so .config is not included in this case either (for *config). |
| | 243 | |
| | 244 | version_h := include/generated/uapi/linux/version.h |
| | 245 | old_version_h := include/linux/version.h |
| | 246 | |
| | 247 | clean-targets := %clean mrproper cleandocs |
| | 248 | no-dot-config-targets := $(clean-targets) \ |
| | 249 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
| | 250 | $(version_h) headers_% archheaders archscripts \ |
| | 251 | %asm-generic kernelversion %src-pkg |
| | 252 | no-sync-config-targets := $(no-dot-config-targets) install %install \ |
| | 253 | kernelrelease |
| | 254 | |
| | 255 | config-targets := 0 |
| | 256 | mixed-targets := 0 |
| | 257 | dot-config := 1 |
| | 258 | may-sync-config := 1 |
| | 259 | |
| | 260 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 261 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 262 | dot-config := 0 |
| | 263 | endif |
| | 264 | endif |
| | 265 | |
| | 266 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| | 267 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| | 268 | may-sync-config := 0 |
| | 269 | endif |
| | 270 | endif |
| | 271 | |
| | 272 | ifneq ($(KBUILD_EXTMOD),) |
| | 273 | may-sync-config := 0 |
| | 274 | endif |
| | 275 | |
| | 276 | ifeq ($(KBUILD_EXTMOD),) |
| | 277 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| | 278 | config-targets := 1 |
| | 279 | ifneq ($(words $(MAKECMDGOALS)),1) |
| | 280 | mixed-targets := 1 |
| | 281 | endif |
| | 282 | endif |
| | 283 | endif |
| | 284 | |
| | 285 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
| | 286 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) |
| | 287 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) |
| | 288 | mixed-targets := 1 |
| | 289 | endif |
| | 290 | endif |
| | 291 | |
| | 292 | # install and modules_install need also be processed one by one |
| | 293 | ifneq ($(filter install,$(MAKECMDGOALS)),) |
| | 294 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
| | 295 | mixed-targets := 1 |
| | 296 | endif |
| | 297 | endif |
| | 298 | |
| | 299 | ifeq ($(mixed-targets),1) |
| | 300 | # =========================================================================== |
| | 301 | # We're called with mixed targets (*config and build targets). |
| | 302 | # Handle them one by one. |
| | 303 | |
| | 304 | PHONY += $(MAKECMDGOALS) __build_one_by_one |
| | 305 | |
| | 306 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one |
| | 307 | @: |
| | 308 | |
| | 309 | __build_one_by_one: |
| | 310 | $(Q)set -e; \ |
| | 311 | for i in $(MAKECMDGOALS); do \ |
| | 312 | $(MAKE) -f $(srctree)/Makefile $$i; \ |
| | 313 | done |
| | 314 | |
| | 315 | else |
| | 316 | |
| | 317 | include scripts/Kbuild.include |
| | 318 | |
| | 319 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
| | 320 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| | 321 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| | 322 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| | 323 | |
| | 324 | include scripts/subarch.include |
| | 325 | |
| | 326 | # Cross compiling and selecting different set of gcc/bin-utils |
| | 327 | # --------------------------------------------------------------------------- |
| | 328 | # |
| | 329 | # When performing cross compilation for other architectures ARCH shall be set |
| | 330 | # to the target architecture. (See arch/* for the possibilities). |
| | 331 | # ARCH can be set during invocation of make: |
| | 332 | # make ARCH=ia64 |
| | 333 | # Another way is to have ARCH set in the environment. |
| | 334 | # The default ARCH is the host where make is executed. |
| | 335 | |
| | 336 | # CROSS_COMPILE specify the prefix used for all executables used |
| | 337 | # during compilation. Only gcc and related bin-utils executables |
| | 338 | # are prefixed with $(CROSS_COMPILE). |
| | 339 | # CROSS_COMPILE can be set on the command line |
| | 340 | # make CROSS_COMPILE=ia64-linux- |
| | 341 | # Alternatively CROSS_COMPILE can be set in the environment. |
| | 342 | # Default value for CROSS_COMPILE is not to prefix executables |
| | 343 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| | 344 | ARCH ?= $(SUBARCH) |
| | 345 | |
| | 346 | # Architecture as present in compile.h |
| | 347 | UTS_MACHINE := $(ARCH) |
| | 348 | SRCARCH := $(ARCH) |
| | 349 | |
| | 350 | # Additional ARCH settings for x86 |
| | 351 | ifeq ($(ARCH),i386) |
| | 352 | SRCARCH := x86 |
| | 353 | endif |
| | 354 | ifeq ($(ARCH),x86_64) |
| | 355 | SRCARCH := x86 |
| | 356 | endif |
| | 357 | |
| | 358 | # Additional ARCH settings for sparc |
| | 359 | ifeq ($(ARCH),sparc32) |
| | 360 | SRCARCH := sparc |
| | 361 | endif |
| | 362 | ifeq ($(ARCH),sparc64) |
| | 363 | SRCARCH := sparc |
| | 364 | endif |
| | 365 | |
| | 366 | # Additional ARCH settings for sh |
| | 367 | ifeq ($(ARCH),sh64) |
| | 368 | SRCARCH := sh |
| | 369 | endif |
| | 370 | |
| | 371 | KCONFIG_CONFIG ?= .config |
| | 372 | export KCONFIG_CONFIG |
| | 373 | |
| | 374 | # SHELL used by kbuild |
| | 375 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
| | 376 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
| | 377 | else echo sh; fi ; fi) |
| | 378 | |
| | 379 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
| | 380 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
| | 381 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
| | 382 | |
| | 383 | HOSTCC = gcc |
| | 384 | HOSTCXX = g++ |
| | 385 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
| | 386 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
| | 387 | $(HOSTCFLAGS) |
| | 388 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
| | 389 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
| | 390 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) |
| | 391 | |
| | 392 | # Make variables (CC, etc...) |
| | 393 | AS = $(CROSS_COMPILE)as |
| | 394 | LD = $(CROSS_COMPILE)ld |
| | 395 | CC = $(CROSS_COMPILE)gcc |
| | 396 | CPP = $(CC) -E |
| | 397 | AR = $(CROSS_COMPILE)ar |
| | 398 | NM = $(CROSS_COMPILE)nm |
| | 399 | STRIP = $(CROSS_COMPILE)strip |
| | 400 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| | 401 | OBJDUMP = $(CROSS_COMPILE)objdump |
| | 402 | LEX = flex |
| | 403 | YACC = bison |
| | 404 | AWK = awk |
| | 405 | INSTALLKERNEL := installkernel |
| | 406 | DEPMOD = /sbin/depmod |
| | 407 | PERL = perl |
| | 408 | PYTHON = python |
| | 409 | PYTHON2 = python2 |
| | 410 | PYTHON3 = python3 |
| | 411 | CHECK = sparse |
| | 412 | |
| | 413 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| | 414 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
| | 415 | NOSTDINC_FLAGS := |
| | 416 | CFLAGS_MODULE = |
| | 417 | AFLAGS_MODULE = |
| | 418 | LDFLAGS_MODULE = |
| | 419 | CFLAGS_KERNEL = |
| | 420 | AFLAGS_KERNEL = |
| | 421 | LDFLAGS_vmlinux = |
| | 422 | |
| | 423 | # Use USERINCLUDE when you must reference the UAPI directories only. |
| | 424 | USERINCLUDE := \ |
| | 425 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
| | 426 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
| | 427 | -I$(srctree)/include/uapi \ |
| | 428 | -I$(objtree)/include/generated/uapi \ |
| | 429 | -include $(srctree)/include/linux/kconfig.h |
| | 430 | |
| | 431 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| | 432 | # Needed to be compatible with the O= option |
| | 433 | LINUXINCLUDE := \ |
| | 434 | -I$(srctree)/arch/$(SRCARCH)/include \ |
| | 435 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ |
| | 436 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
| | 437 | -I$(objtree)/include \ |
| | 438 | $(USERINCLUDE) |
| | 439 | |
| | 440 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
| | 441 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
| | 442 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
| | 443 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
| | 444 | -Wno-format-security \ |
| | 445 | -std=gnu89 |
| | 446 | KBUILD_CPPFLAGS := -D__KERNEL__ |
| | 447 | KBUILD_AFLAGS_KERNEL := |
| | 448 | KBUILD_CFLAGS_KERNEL := |
| | 449 | KBUILD_AFLAGS_MODULE := -DMODULE |
| | 450 | KBUILD_CFLAGS_MODULE := -DMODULE |
| | 451 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds |
| | 452 | KBUILD_LDFLAGS := |
| | 453 | GCC_PLUGINS_CFLAGS := |
| | 454 | |
| | 455 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC |
| | 456 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
| | 457 | export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
| | 458 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| | 459 | |
| | 460 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
| | 461 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| | 462 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN |
| | 463 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| | 464 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| | 465 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
| | 466 | export KBUILD_ARFLAGS |
| | 467 | |
| | 468 | # When compiling out-of-tree modules, put MODVERDIR in the module |
| | 469 | # tree rather than in the kernel tree. The kernel tree might |
| | 470 | # even be read-only. |
| | 471 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| | 472 | |
| | 473 | # Files to ignore in find ... statements |
| | 474 | |
| | 475 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
| | 476 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
| | 477 | -prune -o |
| | 478 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| | 479 | --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| | 480 | |
| | 481 | # =========================================================================== |
| | 482 | # Rules shared between *config targets and build targets |
| | 483 | |
| | 484 | # Basic helpers built in scripts/basic/ |
| | 485 | PHONY += scripts_basic |
| | 486 | scripts_basic: |
| | 487 | $(Q)$(MAKE) $(build)=scripts/basic |
| | 488 | $(Q)rm -f .tmp_quiet_recordmcount |
| | 489 | |
| | 490 | PHONY += outputmakefile |
| | 491 | # outputmakefile generates a Makefile in the output directory, if using a |
| | 492 | # separate output directory. This allows convenient use of make in the |
| | 493 | # output directory. |
| | 494 | # At the same time when output Makefile generated, generate .gitignore to |
| | 495 | # ignore whole output directory |
| | 496 | outputmakefile: |
| | 497 | ifneq ($(KBUILD_SRC),) |
| | 498 | $(Q)ln -fsn $(srctree) source |
| | 499 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) |
| | 500 | $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
| | 501 | endif |
| | 502 | |
| | 503 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) |
| | 504 | ifneq ($(CROSS_COMPILE),) |
| | 505 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) |
| | 506 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
| | 507 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
| | 508 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
| | 509 | endif |
| | 510 | ifneq ($(GCC_TOOLCHAIN),) |
| | 511 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
| | 512 | endif |
| | 513 | CLANG_FLAGS += -no-integrated-as |
| | 514 | KBUILD_CFLAGS += $(CLANG_FLAGS) |
| | 515 | KBUILD_AFLAGS += $(CLANG_FLAGS) |
| | 516 | export CLANG_FLAGS |
| | 517 | endif |
| | 518 | |
| | 519 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
| | 520 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
| | 521 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
| | 522 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
| | 523 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
| | 524 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
| | 525 | export RETPOLINE_CFLAGS |
| | 526 | export RETPOLINE_VDSO_CFLAGS |
| | 527 | |
| | 528 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
| | 529 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. |
| | 530 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), |
| | 531 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. |
| | 532 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) |
| | 533 | |
| | 534 | ifeq ($(config-targets),1) |
| | 535 | # =========================================================================== |
| | 536 | # *config targets only - make sure prerequisites are updated, and descend |
| | 537 | # in scripts/kconfig to make the *config target |
| | 538 | |
| | 539 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| | 540 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| | 541 | # used for 'make defconfig' |
| | 542 | include arch/$(SRCARCH)/Makefile |
| | 543 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
| | 544 | |
| | 545 | config: scripts_basic outputmakefile FORCE |
| | 546 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| | 547 | |
| | 548 | %config: scripts_basic outputmakefile FORCE |
| | 549 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| | 550 | |
| | 551 | else |
| | 552 | # =========================================================================== |
| | 553 | # Build targets only - this includes vmlinux, arch specific targets, clean |
| | 554 | # targets and others. In general all targets except *config targets. |
| | 555 | |
| | 556 | # If building an external module we do not care about the all: rule |
| | 557 | # but instead _all depend on modules |
| | 558 | PHONY += all |
| | 559 | ifeq ($(KBUILD_EXTMOD),) |
| | 560 | _all: all |
| | 561 | else |
| | 562 | _all: modules |
| | 563 | endif |
| | 564 | |
| | 565 | # Decide whether to build built-in, modular, or both. |
| | 566 | # Normally, just do built-in. |
| | 567 | |
| | 568 | KBUILD_MODULES := |
| | 569 | KBUILD_BUILTIN := 1 |
| | 570 | |
| | 571 | # If we have only "make modules", don't compile built-in objects. |
| | 572 | # When we're building modules with modversions, we need to consider |
| | 573 | # the built-in objects during the descend as well, in order to |
| | 574 | # make sure the checksums are up to date before we record them. |
| | 575 | |
| | 576 | ifeq ($(MAKECMDGOALS),modules) |
| | 577 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
| | 578 | endif |
| | 579 | |
| | 580 | # If we have "make <whatever> modules", compile modules |
| | 581 | # in addition to whatever we do anyway. |
| | 582 | # Just "make" or "make all" shall build modules as well |
| | 583 | |
| | 584 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| | 585 | KBUILD_MODULES := 1 |
| | 586 | endif |
| | 587 | |
| | 588 | ifeq ($(MAKECMDGOALS),) |
| | 589 | KBUILD_MODULES := 1 |
| | 590 | endif |
| | 591 | |
| | 592 | export KBUILD_MODULES KBUILD_BUILTIN |
| | 593 | |
| | 594 | ifeq ($(KBUILD_EXTMOD),) |
| | 595 | # Objects we will link into vmlinux / subdirs we need to visit |
| | 596 | init-y := init/ |
| | 597 | drivers-y := drivers/ sound/ |
| | 598 | net-y := net/ |
| | 599 | libs-y := lib/ |
| | 600 | core-y := usr/ |
| | 601 | virt-y := virt/ |
| | 602 | endif # KBUILD_EXTMOD |
| | 603 | |
| | 604 | ifeq ($(dot-config),1) |
| | 605 | include include/config/auto.conf |
| | 606 | endif |
| | 607 | |
| | 608 | # The all: target is the default when no target is given on the |
| | 609 | # command line. |
| | 610 | # This allow a user to issue only 'make' to build a kernel including modules |
| | 611 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
| | 612 | all: vmlinux |
| | 613 | |
| | 614 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ |
| | 615 | $(call cc-option,-fno-tree-loop-im) \ |
| | 616 | $(call cc-disable-warning,maybe-uninitialized,) |
| | 617 | export CFLAGS_GCOV |
| | 618 | |
| | 619 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
| | 620 | ifdef CONFIG_FUNCTION_TRACER |
| | 621 | CC_FLAGS_FTRACE := -pg |
| | 622 | endif |
| | 623 | |
| | 624 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default |
| | 625 | # values of the respective KBUILD_* variables |
| | 626 | ARCH_CPPFLAGS := |
| | 627 | ARCH_AFLAGS := |
| | 628 | ARCH_CFLAGS := |
| | 629 | include arch/$(SRCARCH)/Makefile |
| | 630 | |
| | 631 | ifeq ($(dot-config),1) |
| | 632 | ifeq ($(may-sync-config),1) |
| | 633 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
| | 634 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile |
| | 635 | # because some architectures define CROSS_COMPILE there. |
| | 636 | -include include/config/auto.conf.cmd |
| | 637 | |
| | 638 | $(KCONFIG_CONFIG): |
| | 639 | @echo >&2 '***' |
| | 640 | @echo >&2 '*** Configuration file "$@" not found!' |
| | 641 | @echo >&2 '***' |
| | 642 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' |
| | 643 | @echo >&2 '*** "make menuconfig" or "make xconfig").' |
| | 644 | @echo >&2 '***' |
| | 645 | @/bin/false |
| | 646 | |
| | 647 | # The actual configuration files used during the build are stored in |
| | 648 | # include/generated/ and include/config/. Update them if .config is newer than |
| | 649 | # include/config/auto.conf (which mirrors .config). |
| | 650 | # |
| | 651 | # This exploits the 'multi-target pattern rule' trick. |
| | 652 | # The syncconfig should be executed only once to make all the targets. |
| | 653 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) |
| | 654 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
| | 655 | else |
| | 656 | # External modules and some install targets need include/generated/autoconf.h |
| | 657 | # and include/config/auto.conf but do not care if they are up-to-date. |
| | 658 | # Use auto.conf to trigger the test |
| | 659 | PHONY += include/config/auto.conf |
| | 660 | |
| | 661 | include/config/auto.conf: |
| | 662 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
| | 663 | echo >&2; \ |
| | 664 | echo >&2 " ERROR: Kernel configuration is invalid."; \ |
| | 665 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ |
| | 666 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| | 667 | echo >&2 ; \ |
| | 668 | /bin/false) |
| | 669 | |
| | 670 | endif # may-sync-config |
| | 671 | endif # $(dot-config) |
| | 672 | |
| | 673 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
| | 674 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
| | 675 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
| | 676 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) |
| | 677 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) |
| | 678 | |
| | 679 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| | 680 | KBUILD_CFLAGS += -Os |
| | 681 | else |
| | 682 | KBUILD_CFLAGS += -O2 |
| | 683 | endif |
| | 684 | |
| | 685 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED |
| | 686 | KBUILD_CFLAGS += -Wno-maybe-uninitialized |
| | 687 | endif |
| | 688 | |
| | 689 | # Tell gcc to never replace conditional load with a non-conditional one |
| | 690 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
| | 691 | |
| | 692 | include scripts/Makefile.kcov |
| | 693 | include scripts/Makefile.gcc-plugins |
| | 694 | |
| | 695 | ifdef CONFIG_READABLE_ASM |
| | 696 | # Disable optimizations that make assembler listings hard to read. |
| | 697 | # reorder blocks reorders the control in the function |
| | 698 | # ipa clone creates specialized cloned functions |
| | 699 | # partial inlining inlines only parts of functions |
| | 700 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ |
| | 701 | $(call cc-option,-fno-ipa-cp-clone,) \ |
| | 702 | $(call cc-option,-fno-partial-inlining) |
| | 703 | endif |
| | 704 | |
| | 705 | ifneq ($(CONFIG_FRAME_WARN),0) |
| | 706 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
| | 707 | endif |
| | 708 | |
| | 709 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
| | 710 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
| | 711 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
| | 712 | |
| | 713 | KBUILD_CFLAGS += $(stackp-flags-y) |
| | 714 | |
| | 715 | ifdef CONFIG_CC_IS_CLANG |
| | 716 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
| | 717 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
| | 718 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) |
| | 719 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
| | 720 | # Quiet clang warning: comparison of unsigned expression < 0 is always false |
| | 721 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) |
| | 722 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
| | 723 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. |
| | 724 | # See modpost pattern 2 |
| | 725 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) |
| | 726 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) |
| | 727 | else |
| | 728 | |
| | 729 | # These warnings generated too much noise in a regular build. |
| | 730 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) |
| | 731 | KBUILD_CFLAGS += -Wno-unused-but-set-variable |
| | 732 | endif |
| | 733 | |
| | 734 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
| | 735 | ifdef CONFIG_FRAME_POINTER |
| | 736 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| | 737 | else |
| | 738 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
| | 739 | # pointers. For those, we don't have FUNCTION_TRACER automatically |
| | 740 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is |
| | 741 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use |
| | 742 | # -fomit-frame-pointer with FUNCTION_TRACER. |
| | 743 | ifndef CONFIG_FUNCTION_TRACER |
| | 744 | KBUILD_CFLAGS += -fomit-frame-pointer |
| | 745 | endif |
| | 746 | endif |
| | 747 | |
| | 748 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) |
| | 749 | |
| | 750 | ifdef CONFIG_DEBUG_INFO |
| | 751 | ifdef CONFIG_DEBUG_INFO_SPLIT |
| | 752 | DEBUG_CFLAGS += -gsplit-dwarf |
| | 753 | else |
| | 754 | DEBUG_CFLAGS += -g |
| | 755 | endif |
| | 756 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
| | 757 | endif |
| | 758 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
| | 759 | DEBUG_CFLAGS += -gdwarf-4 |
| | 760 | endif |
| | 761 | |
| | 762 | ifdef CONFIG_DEBUG_INFO_REDUCED |
| | 763 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
| | 764 | $(call cc-option,-fno-var-tracking) |
| | 765 | endif |
| | 766 | |
| | 767 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
| | 768 | export DEBUG_CFLAGS |
| | 769 | |
| | 770 | ifdef CONFIG_FUNCTION_TRACER |
| | 771 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| | 772 | # gcc 5 supports generating the mcount tables directly |
| | 773 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) |
| | 774 | CC_FLAGS_FTRACE += -mrecord-mcount |
| | 775 | export CC_USING_RECORD_MCOUNT := 1 |
| | 776 | endif |
| | 777 | ifdef CONFIG_HAVE_NOP_MCOUNT |
| | 778 | ifeq ($(call cc-option-yn, -mnop-mcount),y) |
| | 779 | CC_FLAGS_FTRACE += -mnop-mcount |
| | 780 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| | 781 | endif |
| | 782 | endif |
| | 783 | endif |
| | 784 | ifdef CONFIG_HAVE_FENTRY |
| | 785 | ifeq ($(call cc-option-yn, -mfentry),y) |
| | 786 | CC_FLAGS_FTRACE += -mfentry |
| | 787 | CC_FLAGS_USING += -DCC_USING_FENTRY |
| | 788 | endif |
| | 789 | endif |
| | 790 | export CC_FLAGS_FTRACE |
| | 791 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) |
| | 792 | KBUILD_AFLAGS += $(CC_FLAGS_USING) |
| | 793 | ifdef CONFIG_DYNAMIC_FTRACE |
| | 794 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
| | 795 | BUILD_C_RECORDMCOUNT := y |
| | 796 | export BUILD_C_RECORDMCOUNT |
| | 797 | endif |
| | 798 | endif |
| | 799 | endif |
| | 800 | |
| | 801 | # We trigger additional mismatches with less inlining |
| | 802 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| | 803 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) |
| | 804 | endif |
| | 805 | |
| | 806 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
| | 807 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
| | 808 | LDFLAGS_vmlinux += --gc-sections |
| | 809 | endif |
| | 810 | |
| | 811 | # arch Makefile may override CC so keep this after arch Makefile is included |
| | 812 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| | 813 | |
| | 814 | # warn about C99 declaration after statement |
| | 815 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
| | 816 | |
| | 817 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
| | 818 | KBUILD_CFLAGS += $(call cc-option,-Wvla) |
| | 819 | |
| | 820 | # disable pointer signed / unsigned warnings in gcc 4.0 |
| | 821 | KBUILD_CFLAGS += -Wno-pointer-sign |
| | 822 | |
| | 823 | # disable stringop warnings in gcc 8+ |
| | 824 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
| | 825 | |
| | 826 | # disable invalid "can't wrap" optimizations for signed / pointers |
| | 827 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
| | 828 | |
| | 829 | # clang sets -fmerge-all-constants by default as optimization, but this |
| | 830 | # is non-conforming behavior for C and in fact breaks the kernel, so we |
| | 831 | # need to disable it here generally. |
| | 832 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) |
| | 833 | |
| | 834 | # for gcc -fno-merge-all-constants disables everything, but it is fine |
| | 835 | # to have actual conforming behavior enabled. |
| | 836 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) |
| | 837 | |
| | 838 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
| | 839 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) |
| | 840 | |
| | 841 | # conserve stack if available |
| | 842 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) |
| | 843 | |
| | 844 | # Prohibit date/time macros, which would make the build non-deterministic |
| | 845 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) |
| | 846 | |
| | 847 | # enforce correct pointer usage |
| | 848 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) |
| | 849 | |
| | 850 | # Require designated initializers for all marked structures |
| | 851 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) |
| | 852 | |
| | 853 | # change __FILE__ to the relative path from the srctree |
| | 854 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| | 855 | |
| | 856 | # use the deterministic mode of AR if available |
| | 857 | KBUILD_ARFLAGS := $(call ar-option,D) |
| | 858 | |
| | 859 | include scripts/Makefile.kasan |
| | 860 | include scripts/Makefile.extrawarn |
| | 861 | include scripts/Makefile.ubsan |
| | 862 | |
| | 863 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
| | 864 | # last assignments |
| | 865 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) |
| | 866 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) |
| | 867 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) |
| | 868 | |
| | 869 | # Use --build-id when available. |
| | 870 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
| | 871 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
| | 872 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
| | 873 | |
| | 874 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
| | 875 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
| | 876 | endif |
| | 877 | |
| | 878 | # insure the checker run with the right endianness |
| | 879 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) |
| | 880 | |
| | 881 | # the checker needs the correct machine size |
| | 882 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) |
| | 883 | |
| | 884 | # Default kernel image to build when no specific target is given. |
| | 885 | # KBUILD_IMAGE may be overruled on the command line or |
| | 886 | # set in the environment |
| | 887 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| | 888 | # this default value |
| | 889 | export KBUILD_IMAGE ?= vmlinux |
| | 890 | |
| | 891 | # |
| | 892 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| | 893 | # images. Default is /boot, but you can set it to other values |
| | 894 | export INSTALL_PATH ?= /boot |
| | 895 | |
| | 896 | # |
| | 897 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. |
| | 898 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as |
| | 899 | # an argument if needed. Otherwise it defaults to the kernel install path |
| | 900 | # |
| | 901 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) |
| | 902 | |
| | 903 | # |
| | 904 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| | 905 | # relocations required by build roots. This is not defined in the |
| | 906 | # makefile but the argument can be passed to make if needed. |
| | 907 | # |
| | 908 | |
| | 909 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| | 910 | export MODLIB |
| | 911 | |
| | 912 | # |
| | 913 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
| | 914 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
| | 915 | # the default option --strip-debug will be used. Otherwise, |
| | 916 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. |
| | 917 | |
| | 918 | ifdef INSTALL_MOD_STRIP |
| | 919 | ifeq ($(INSTALL_MOD_STRIP),1) |
| | 920 | mod_strip_cmd = $(STRIP) --strip-debug |
| | 921 | else |
| | 922 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
| | 923 | endif # INSTALL_MOD_STRIP=1 |
| | 924 | else |
| | 925 | mod_strip_cmd = true |
| | 926 | endif # INSTALL_MOD_STRIP |
| | 927 | export mod_strip_cmd |
| | 928 | |
| | 929 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
| | 930 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP |
| | 931 | # or CONFIG_MODULE_COMPRESS_XZ. |
| | 932 | |
| | 933 | mod_compress_cmd = true |
| | 934 | ifdef CONFIG_MODULE_COMPRESS |
| | 935 | ifdef CONFIG_MODULE_COMPRESS_GZIP |
| | 936 | mod_compress_cmd = gzip -n -f |
| | 937 | endif # CONFIG_MODULE_COMPRESS_GZIP |
| | 938 | ifdef CONFIG_MODULE_COMPRESS_XZ |
| | 939 | mod_compress_cmd = xz -f |
| | 940 | endif # CONFIG_MODULE_COMPRESS_XZ |
| | 941 | endif # CONFIG_MODULE_COMPRESS |
| | 942 | export mod_compress_cmd |
| | 943 | |
| | 944 | ifdef CONFIG_MODULE_SIG_ALL |
| | 945 | $(eval $(call config_filename,MODULE_SIG_KEY)) |
| | 946 | |
| | 947 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 |
| | 948 | else |
| | 949 | mod_sign_cmd = true |
| | 950 | endif |
| | 951 | export mod_sign_cmd |
| | 952 | |
| | 953 | ifdef CONFIG_STACK_VALIDATION |
| | 954 | has_libelf := $(call try-run,\ |
| | 955 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) |
| | 956 | ifeq ($(has_libelf),1) |
| | 957 | objtool_target := tools/objtool FORCE |
| | 958 | else |
| | 959 | SKIP_STACK_VALIDATION := 1 |
| | 960 | export SKIP_STACK_VALIDATION |
| | 961 | endif |
| | 962 | endif |
| | 963 | |
| | 964 | PHONY += prepare0 |
| | 965 | |
| | 966 | ifeq ($(KBUILD_EXTMOD),) |
| | 967 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
| | 968 | |
| | 969 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ |
| | 970 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| | 971 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
| | 972 | |
| | 973 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ |
| | 974 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
| | 975 | |
| | 976 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
| | 977 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) |
| | 978 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) |
| | 979 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) |
| | 980 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| | 981 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) |
| | 982 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) |
| | 983 | |
| | 984 | # Externally visible symbols (used by link-vmlinux.sh) |
| | 985 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ |
| | 986 | $(drivers-y) $(net-y) $(virt-y) |
| | 987 | export KBUILD_VMLINUX_LIBS := $(libs-y1) |
| | 988 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
| | 989 | export LDFLAGS_vmlinux |
| | 990 | # used by scripts/package/Makefile |
| | 991 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) |
| | 992 | |
| | 993 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
| | 994 | |
| | 995 | # Recurse until adjust_autoksyms.sh is satisfied |
| | 996 | PHONY += autoksyms_recursive |
| | 997 | autoksyms_recursive: $(vmlinux-deps) |
| | 998 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| | 999 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
| | 1000 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
| | 1001 | endif |
| | 1002 | |
| | 1003 | # For the kernel to actually contain only the needed exported symbols, |
| | 1004 | # we have to build modules as well to determine what those symbols are. |
| | 1005 | # (this can be evaluated only once include/config/auto.conf has been included) |
| | 1006 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| | 1007 | KBUILD_MODULES := 1 |
| | 1008 | endif |
| | 1009 | |
| | 1010 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
| | 1011 | |
| | 1012 | $(autoksyms_h): |
| | 1013 | $(Q)mkdir -p $(dir $@) |
| | 1014 | $(Q)touch $@ |
| | 1015 | |
| | 1016 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| | 1017 | |
| | 1018 | # Final link of vmlinux with optional arch pass after final link |
| | 1019 | cmd_link-vmlinux = \ |
| | 1020 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
| | 1021 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| | 1022 | |
| | 1023 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
| | 1024 | +$(call if_changed,link-vmlinux) |
| | 1025 | |
| | 1026 | targets := vmlinux |
| | 1027 | |
| | 1028 | # Build samples along the rest of the kernel. This needs headers_install. |
| | 1029 | ifdef CONFIG_SAMPLES |
| | 1030 | vmlinux-dirs += samples |
| | 1031 | samples: headers_install |
| | 1032 | endif |
| | 1033 | |
| | 1034 | # The actual objects are generated when descending, |
| | 1035 | # make sure no implicit rule kicks in |
| | 1036 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
| | 1037 | |
| | 1038 | # Handle descending into subdirectories listed in $(vmlinux-dirs) |
| | 1039 | # Preset locale variables to speed up the build process. Limit locale |
| | 1040 | # tweaks to this spot to avoid wrong language settings when running |
| | 1041 | # make menuconfig etc. |
| | 1042 | # Error messages still appears in the original language |
| | 1043 | |
| | 1044 | PHONY += $(vmlinux-dirs) |
| | 1045 | $(vmlinux-dirs): prepare |
| | 1046 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
| | 1047 | |
| | 1048 | filechk_kernel.release = \ |
| | 1049 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| | 1050 | |
| | 1051 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
| | 1052 | include/config/kernel.release: $(srctree)/Makefile FORCE |
| | 1053 | $(call filechk,kernel.release) |
| | 1054 | |
| | 1055 | # Additional helpers built in scripts/ |
| | 1056 | # Carefully list dependencies so we do not try to build scripts twice |
| | 1057 | # in parallel |
| | 1058 | PHONY += scripts |
| | 1059 | scripts: scripts_basic scripts_dtc |
| | 1060 | $(Q)$(MAKE) $(build)=$(@) |
| | 1061 | |
| | 1062 | # Things we need to do before we recursively start building the kernel |
| | 1063 | # or the modules are listed in "prepare". |
| | 1064 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| | 1065 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| | 1066 | # version.h and scripts_basic is processed / created. |
| | 1067 | |
| | 1068 | PHONY += prepare archprepare prepare1 prepare3 |
| | 1069 | |
| | 1070 | # prepare3 is used to check if we are building in a separate output directory, |
| | 1071 | # and if so do: |
| | 1072 | # 1) Check that make has not been executed in the kernel src $(srctree) |
| | 1073 | prepare3: include/config/kernel.release |
| | 1074 | ifneq ($(KBUILD_SRC),) |
| | 1075 | @$(kecho) ' Using $(srctree) as source for kernel' |
| | 1076 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
| | 1077 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
| | 1078 | echo >&2 " in the '$(srctree)' directory.";\ |
| | 1079 | /bin/false; \ |
| | 1080 | fi; |
| | 1081 | endif |
| | 1082 | |
| | 1083 | prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ |
| | 1084 | include/generated/utsrelease.h |
| | 1085 | $(cmd_crmodverdir) |
| | 1086 | |
| | 1087 | archprepare: archheaders archscripts prepare1 scripts |
| | 1088 | |
| | 1089 | prepare0: archprepare |
| | 1090 | $(Q)$(MAKE) $(build)=scripts/mod |
| | 1091 | $(Q)$(MAKE) $(build)=. |
| | 1092 | |
| | 1093 | # All the preparing.. |
| | 1094 | prepare: prepare0 prepare-objtool |
| | 1095 | |
| | 1096 | # Support for using generic headers in asm-generic |
| | 1097 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
| | 1098 | |
| | 1099 | PHONY += asm-generic uapi-asm-generic |
| | 1100 | asm-generic: uapi-asm-generic |
| | 1101 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
| | 1102 | generic=include/asm-generic |
| | 1103 | uapi-asm-generic: |
| | 1104 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
| | 1105 | generic=include/uapi/asm-generic |
| | 1106 | |
| | 1107 | PHONY += prepare-objtool |
| | 1108 | prepare-objtool: $(objtool_target) |
| | 1109 | ifeq ($(SKIP_STACK_VALIDATION),1) |
| | 1110 | ifdef CONFIG_UNWINDER_ORC |
| | 1111 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 |
| | 1112 | @false |
| | 1113 | else |
| | 1114 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 |
| | 1115 | endif |
| | 1116 | endif |
| | 1117 | |
| | 1118 | # Generate some files |
| | 1119 | # --------------------------------------------------------------------------- |
| | 1120 | |
| | 1121 | # KERNELRELEASE can change from a few different places, meaning version.h |
| | 1122 | # needs to be updated, so this check is forced on all builds |
| | 1123 | |
| | 1124 | uts_len := 64 |
| | 1125 | define filechk_utsrelease.h |
| | 1126 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| | 1127 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| | 1128 | exit 1; \ |
| | 1129 | fi; \ |
| | 1130 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
| | 1131 | endef |
| | 1132 | |
| | 1133 | define filechk_version.h |
| | 1134 | echo \#define LINUX_VERSION_CODE $(shell \ |
| | 1135 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
| | 1136 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' |
| | 1137 | endef |
| | 1138 | |
| | 1139 | $(version_h): FORCE |
| | 1140 | $(call filechk,version.h) |
| | 1141 | $(Q)rm -f $(old_version_h) |
| | 1142 | |
| | 1143 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
| | 1144 | $(call filechk,utsrelease.h) |
| | 1145 | |
| | 1146 | PHONY += headerdep |
| | 1147 | headerdep: |
| | 1148 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
| | 1149 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| | 1150 | |
| | 1151 | # --------------------------------------------------------------------------- |
| | 1152 | # Kernel headers |
| | 1153 | |
| | 1154 | #Default location for installed headers |
| | 1155 | export INSTALL_HDR_PATH = $(objtree)/usr |
| | 1156 | |
| | 1157 | # If we do an all arch process set dst to include/arch-$(SRCARCH) |
| | 1158 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) |
| | 1159 | |
| | 1160 | PHONY += archheaders archscripts |
| | 1161 | |
| | 1162 | PHONY += __headers |
| | 1163 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
| | 1164 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
| | 1165 | |
| | 1166 | PHONY += headers_install_all |
| | 1167 | headers_install_all: |
| | 1168 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install |
| | 1169 | |
| | 1170 | PHONY += headers_install |
| | 1171 | headers_install: __headers |
| | 1172 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
| | 1173 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
| | 1174 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
| | 1175 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
| | 1176 | |
| | 1177 | PHONY += headers_check_all |
| | 1178 | headers_check_all: headers_install_all |
| | 1179 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
| | 1180 | |
| | 1181 | PHONY += headers_check |
| | 1182 | headers_check: headers_install |
| | 1183 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
| | 1184 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
| | 1185 | |
| | 1186 | ifdef CONFIG_HEADERS_CHECK |
| | 1187 | all: headers_check |
| | 1188 | endif |
| | 1189 | |
| | 1190 | # --------------------------------------------------------------------------- |
| | 1191 | # Kernel selftest |
| | 1192 | |
| | 1193 | PHONY += kselftest |
| | 1194 | kselftest: |
| | 1195 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
| | 1196 | |
| | 1197 | PHONY += kselftest-clean |
| | 1198 | kselftest-clean: |
| | 1199 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
| | 1200 | |
| | 1201 | PHONY += kselftest-merge |
| | 1202 | kselftest-merge: |
| | 1203 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) |
| | 1204 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ |
| | 1205 | -m $(objtree)/.config \ |
| | 1206 | $(srctree)/tools/testing/selftests/*/config |
| | 1207 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
| | 1208 | |
| | 1209 | # --------------------------------------------------------------------------- |
| | 1210 | # Devicetree files |
| | 1211 | |
| | 1212 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) |
| | 1213 | dtstree := arch/$(SRCARCH)/boot/dts |
| | 1214 | endif |
| | 1215 | |
| | 1216 | ifneq ($(dtstree),) |
| | 1217 | |
| | 1218 | %.dtb: prepare3 scripts_dtc |
| | 1219 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| | 1220 | |
| | 1221 | PHONY += dtbs dtbs_install dt_binding_check |
| | 1222 | dtbs dtbs_check: prepare3 scripts_dtc |
| | 1223 | $(Q)$(MAKE) $(build)=$(dtstree) |
| | 1224 | |
| | 1225 | dtbs_check: export CHECK_DTBS=1 |
| | 1226 | dtbs_check: dt_binding_check |
| | 1227 | |
| | 1228 | dtbs_install: |
| | 1229 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) |
| | 1230 | |
| | 1231 | ifdef CONFIG_OF_EARLY_FLATTREE |
| | 1232 | all: dtbs |
| | 1233 | endif |
| | 1234 | |
| | 1235 | endif |
| | 1236 | |
| | 1237 | PHONY += scripts_dtc |
| | 1238 | scripts_dtc: scripts_basic |
| | 1239 | $(Q)$(MAKE) $(build)=scripts/dtc |
| | 1240 | |
| | 1241 | dt_binding_check: scripts_dtc |
| | 1242 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings |
| | 1243 | |
| | 1244 | # --------------------------------------------------------------------------- |
| | 1245 | # Modules |
| | 1246 | |
| | 1247 | ifdef CONFIG_MODULES |
| | 1248 | |
| | 1249 | # By default, build modules as well |
| | 1250 | |
| | 1251 | all: modules |
| | 1252 | |
| | 1253 | # Build modules |
| | 1254 | # |
| | 1255 | # A module can be listed more than once in obj-m resulting in |
| | 1256 | # duplicate lines in modules.order files. Those are removed |
| | 1257 | # using awk while concatenating to the final file. |
| | 1258 | |
| | 1259 | PHONY += modules |
| | 1260 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
| | 1261 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
| | 1262 | @$(kecho) ' Building modules, stage 2.'; |
| | 1263 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1264 | |
| | 1265 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
| | 1266 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin |
| | 1267 | |
| | 1268 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
| | 1269 | $(Q)$(MAKE) $(modbuiltin)=$* |
| | 1270 | |
| | 1271 | |
| | 1272 | # Target to prepare building external modules |
| | 1273 | PHONY += modules_prepare |
| | 1274 | modules_prepare: prepare |
| | 1275 | |
| | 1276 | # Target to install modules |
| | 1277 | PHONY += modules_install |
| | 1278 | modules_install: _modinst_ _modinst_post |
| | 1279 | |
| | 1280 | PHONY += _modinst_ |
| | 1281 | _modinst_: |
| | 1282 | @rm -rf $(MODLIB)/kernel |
| | 1283 | @rm -f $(MODLIB)/source |
| | 1284 | @mkdir -p $(MODLIB)/kernel |
| | 1285 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
| | 1286 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| | 1287 | rm -f $(MODLIB)/build ; \ |
| | 1288 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
| | 1289 | fi |
| | 1290 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
| | 1291 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
| | 1292 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| | 1293 | |
| | 1294 | # This depmod is only for convenience to give the initial |
| | 1295 | # boot a modules.dep even before / is mounted read-write. However the |
| | 1296 | # boot script depmod is the master version. |
| | 1297 | PHONY += _modinst_post |
| | 1298 | _modinst_post: _modinst_ |
| | 1299 | $(call cmd,depmod) |
| | 1300 | |
| | 1301 | ifeq ($(CONFIG_MODULE_SIG), y) |
| | 1302 | PHONY += modules_sign |
| | 1303 | modules_sign: |
| | 1304 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign |
| | 1305 | endif |
| | 1306 | |
| | 1307 | else # CONFIG_MODULES |
| | 1308 | |
| | 1309 | # Modules not configured |
| | 1310 | # --------------------------------------------------------------------------- |
| | 1311 | |
| | 1312 | PHONY += modules modules_install |
| | 1313 | modules modules_install: |
| | 1314 | @echo >&2 |
| | 1315 | @echo >&2 "The present kernel configuration has modules disabled." |
| | 1316 | @echo >&2 "Type 'make config' and enable loadable module support." |
| | 1317 | @echo >&2 "Then build a kernel with module support enabled." |
| | 1318 | @echo >&2 |
| | 1319 | @exit 1 |
| | 1320 | |
| | 1321 | endif # CONFIG_MODULES |
| | 1322 | |
| | 1323 | ### |
| | 1324 | # Cleaning is done on three levels. |
| | 1325 | # make clean Delete most generated files |
| | 1326 | # Leave enough to build external modules |
| | 1327 | # make mrproper Delete the current configuration, and all generated files |
| | 1328 | # make distclean Remove editor backup files, patch leftover files and the like |
| | 1329 | |
| | 1330 | # Directories & files removed with 'make clean' |
| | 1331 | CLEAN_DIRS += $(MODVERDIR) include/ksym |
| | 1332 | |
| | 1333 | # Directories & files removed with 'make mrproper' |
| | 1334 | MRPROPER_DIRS += include/config usr/include include/generated \ |
| | 1335 | arch/*/include/generated .tmp_objdiff |
| | 1336 | MRPROPER_FILES += .config .config.old .version \ |
| | 1337 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
| | 1338 | signing_key.pem signing_key.priv signing_key.x509 \ |
| | 1339 | x509.genkey extra_certificates signing_key.x509.keyid \ |
| | 1340 | signing_key.x509.signer vmlinux-gdb.py |
| | 1341 | |
| | 1342 | # clean - Delete most, but leave enough to build external modules |
| | 1343 | # |
| | 1344 | clean: rm-dirs := $(CLEAN_DIRS) |
| | 1345 | clean: rm-files := $(CLEAN_FILES) |
| | 1346 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
| | 1347 | |
| | 1348 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
| | 1349 | $(clean-dirs): |
| | 1350 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| | 1351 | |
| | 1352 | vmlinuxclean: |
| | 1353 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
| | 1354 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
| | 1355 | |
| | 1356 | clean: archclean vmlinuxclean |
| | 1357 | |
| | 1358 | # mrproper - Delete all generated files, including .config |
| | 1359 | # |
| | 1360 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| | 1361 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| | 1362 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
| | 1363 | |
| | 1364 | PHONY += $(mrproper-dirs) mrproper |
| | 1365 | $(mrproper-dirs): |
| | 1366 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| | 1367 | |
| | 1368 | mrproper: clean $(mrproper-dirs) |
| | 1369 | $(call cmd,rmdirs) |
| | 1370 | $(call cmd,rmfiles) |
| | 1371 | |
| | 1372 | # distclean |
| | 1373 | # |
| | 1374 | PHONY += distclean |
| | 1375 | |
| | 1376 | distclean: mrproper |
| | 1377 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
| | 1378 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| | 1379 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
| | 1380 | -o -name 'core' \) \ |
| | 1381 | -type f -print | xargs rm -f |
| | 1382 | |
| | 1383 | |
| | 1384 | # Packaging of the kernel to various formats |
| | 1385 | # --------------------------------------------------------------------------- |
| | 1386 | package-dir := scripts/package |
| | 1387 | |
| | 1388 | %src-pkg: FORCE |
| | 1389 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1390 | %pkg: include/config/kernel.release FORCE |
| | 1391 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1392 | |
| | 1393 | |
| | 1394 | # Brief documentation of the typical targets used |
| | 1395 | # --------------------------------------------------------------------------- |
| | 1396 | |
| | 1397 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| | 1398 | boards := $(sort $(notdir $(boards))) |
| | 1399 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| | 1400 | board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| | 1401 | |
| | 1402 | PHONY += help |
| | 1403 | help: |
| | 1404 | @echo 'Cleaning targets:' |
| | 1405 | @echo ' clean - Remove most generated files but keep the config and' |
| | 1406 | @echo ' enough build support to build external modules' |
| | 1407 | @echo ' mrproper - Remove all generated files + config + various backup files' |
| | 1408 | @echo ' distclean - mrproper + remove editor backup and patch files' |
| | 1409 | @echo '' |
| | 1410 | @echo 'Configuration targets:' |
| | 1411 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| | 1412 | @echo '' |
| | 1413 | @echo 'Other generic targets:' |
| | 1414 | @echo ' all - Build all targets marked with [*]' |
| | 1415 | @echo '* vmlinux - Build the bare kernel' |
| | 1416 | @echo '* modules - Build all modules' |
| | 1417 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| | 1418 | @echo ' dir/ - Build all files in dir and below' |
| | 1419 | @echo ' dir/file.[ois] - Build specified target only' |
| | 1420 | @echo ' dir/file.ll - Build the LLVM assembly file' |
| | 1421 | @echo ' (requires compiler support for LLVM assembly generation)' |
| | 1422 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| | 1423 | @echo ' (requires a recent binutils and recent build (System.map))' |
| | 1424 | @echo ' dir/file.ko - Build module including final link' |
| | 1425 | @echo ' modules_prepare - Set up for building external modules' |
| | 1426 | @echo ' tags/TAGS - Generate tags file for editors' |
| | 1427 | @echo ' cscope - Generate cscope index' |
| | 1428 | @echo ' gtags - Generate GNU GLOBAL index' |
| | 1429 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
| | 1430 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
| | 1431 | @echo ' image_name - Output the image name (use with make -s)' |
| | 1432 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| | 1433 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| | 1434 | echo '' |
| | 1435 | @echo 'Static analysers:' |
| | 1436 | @echo ' checkstack - Generate a list of stack hogs' |
| | 1437 | @echo ' namespacecheck - Name space analysis on compiled kernel' |
| | 1438 | @echo ' versioncheck - Sanity check on version.h usage' |
| | 1439 | @echo ' includecheck - Check for duplicate included header files' |
| | 1440 | @echo ' export_report - List the usages of all exported symbols' |
| | 1441 | @echo ' headers_check - Sanity check on exported headers' |
| | 1442 | @echo ' headerdep - Detect inclusion cycles in headers' |
| | 1443 | @echo ' coccicheck - Check with Coccinelle' |
| | 1444 | @echo '' |
| | 1445 | @echo 'Kernel selftest:' |
| | 1446 | @echo ' kselftest - Build and run kernel selftest (run as root)' |
| | 1447 | @echo ' Build, install, and boot kernel before' |
| | 1448 | @echo ' running kselftest on it' |
| | 1449 | @echo ' kselftest-clean - Remove all generated kselftest files' |
| | 1450 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
| | 1451 | @echo ' .config.' |
| | 1452 | @echo '' |
| | 1453 | @$(if $(dtstree), \ |
| | 1454 | echo 'Devicetree:'; \ |
| | 1455 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
| | 1456 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ |
| | 1457 | echo '') |
| | 1458 | |
| | 1459 | @echo 'Userspace tools targets:' |
| | 1460 | @echo ' use "make tools/help"' |
| | 1461 | @echo ' or "cd tools; make help"' |
| | 1462 | @echo '' |
| | 1463 | @echo 'Kernel packaging:' |
| | 1464 | @$(MAKE) $(build)=$(package-dir) help |
| | 1465 | @echo '' |
| | 1466 | @echo 'Documentation targets:' |
| | 1467 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
| | 1468 | @echo '' |
| | 1469 | @echo 'Architecture specific targets ($(SRCARCH)):' |
| | 1470 | @$(if $(archhelp),$(archhelp),\ |
| | 1471 | echo ' No architecture specific help defined for $(SRCARCH)') |
| | 1472 | @echo '' |
| | 1473 | @$(if $(boards), \ |
| | 1474 | $(foreach b, $(boards), \ |
| | 1475 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| | 1476 | echo '') |
| | 1477 | @$(if $(board-dirs), \ |
| | 1478 | $(foreach b, $(board-dirs), \ |
| | 1479 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| | 1480 | printf " %-16s - Show all of the above\\n" help-boards; \ |
| | 1481 | echo '') |
| | 1482 | |
| | 1483 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| | 1484 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| | 1485 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| | 1486 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' |
| | 1487 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| | 1488 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
| | 1489 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
| | 1490 | @echo ' 1: warnings which may be relevant and do not occur too often' |
| | 1491 | @echo ' 2: warnings which occur quite often but may still be relevant' |
| | 1492 | @echo ' 3: more obscure warnings, can most likely be ignored' |
| | 1493 | @echo ' Multiple levels can be combined with W=12 or W=123' |
| | 1494 | @echo '' |
| | 1495 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| | 1496 | @echo 'For further info see the ./README file' |
| | 1497 | |
| | 1498 | |
| | 1499 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
| | 1500 | |
| | 1501 | help-boards: $(help-board-dirs) |
| | 1502 | |
| | 1503 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
| | 1504 | |
| | 1505 | $(help-board-dirs): help-%: |
| | 1506 | @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| | 1507 | @$(if $(boards-per-dir), \ |
| | 1508 | $(foreach b, $(boards-per-dir), \ |
| | 1509 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| | 1510 | echo '') |
| | 1511 | |
| | 1512 | |
| | 1513 | # Documentation targets |
| | 1514 | # --------------------------------------------------------------------------- |
| | 1515 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
| | 1516 | linkcheckdocs dochelp refcheckdocs |
| | 1517 | PHONY += $(DOC_TARGETS) |
| | 1518 | $(DOC_TARGETS): scripts_basic FORCE |
| | 1519 | $(Q)$(MAKE) $(build)=Documentation $@ |
| | 1520 | |
| | 1521 | # Misc |
| | 1522 | # --------------------------------------------------------------------------- |
| | 1523 | |
| | 1524 | PHONY += scripts_gdb |
| | 1525 | scripts_gdb: prepare |
| | 1526 | $(Q)$(MAKE) $(build)=scripts/gdb |
| | 1527 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
| | 1528 | |
| | 1529 | ifdef CONFIG_GDB_SCRIPTS |
| | 1530 | all: scripts_gdb |
| | 1531 | endif |
| | 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 | PHONY += prepare |
| | 1605 | prepare: |
| | 1606 | $(cmd_crmodverdir) |
| | 1607 | endif # KBUILD_EXTMOD |
| | 1608 | |
| | 1609 | clean: $(clean-dirs) |
| | 1610 | $(call cmd,rmdirs) |
| | 1611 | $(call cmd,rmfiles) |
| | 1612 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| | 1613 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
| | 1614 | -o -name '*.ko.*' \ |
| | 1615 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ |
| | 1616 | -o -name '*.dwo' -o -name '*.lst' \ |
| | 1617 | -o -name '*.su' \ |
| | 1618 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| | 1619 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
| | 1620 | -o -name '*.asn1.[ch]' \ |
| | 1621 | -o -name '*.symtypes' -o -name 'modules.order' \ |
| | 1622 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ |
| | 1623 | -o -name '*.c.[012]*.*' \ |
| | 1624 | -o -name '*.ll' \ |
| | 1625 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
| | 1626 | |
| | 1627 | # Generate tags for editors |
| | 1628 | # --------------------------------------------------------------------------- |
| | 1629 | quiet_cmd_tags = GEN $@ |
| | 1630 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ |
| | 1631 | |
| | 1632 | tags TAGS cscope gtags: FORCE |
| | 1633 | $(call cmd,tags) |
| | 1634 | |
| | 1635 | # Scripts to check various things for consistency |
| | 1636 | # --------------------------------------------------------------------------- |
| | 1637 | |
| | 1638 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
| | 1639 | |
| | 1640 | includecheck: |
| | 1641 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| | 1642 | -name '*.[hcS]' -type f -print | sort \ |
| | 1643 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
| | 1644 | |
| | 1645 | versioncheck: |
| | 1646 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| | 1647 | -name '*.[hcS]' -type f -print | sort \ |
| | 1648 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
| | 1649 | |
| | 1650 | coccicheck: |
| | 1651 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ |
| | 1652 | |
| | 1653 | namespacecheck: |
| | 1654 | $(PERL) $(srctree)/scripts/namespace.pl |
| | 1655 | |
| | 1656 | export_report: |
| | 1657 | $(PERL) $(srctree)/scripts/export_report.pl |
| | 1658 | |
| | 1659 | PHONY += checkstack kernelrelease kernelversion image_name |
| | 1660 | |
| | 1661 | # UML needs a little special treatment here. It wants to use the host |
| | 1662 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| | 1663 | # else wants $(ARCH), including people doing cross-builds, which means |
| | 1664 | # that $(SUBARCH) doesn't work here. |
| | 1665 | ifeq ($(ARCH), um) |
| | 1666 | CHECKSTACK_ARCH := $(SUBARCH) |
| | 1667 | else |
| | 1668 | CHECKSTACK_ARCH := $(ARCH) |
| | 1669 | endif |
| | 1670 | checkstack: |
| | 1671 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| | 1672 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| | 1673 | |
| | 1674 | kernelrelease: |
| | 1675 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| | 1676 | |
| | 1677 | kernelversion: |
| | 1678 | @echo $(KERNELVERSION) |
| | 1679 | |
| | 1680 | image_name: |
| | 1681 | @echo $(KBUILD_IMAGE) |
| | 1682 | |
| | 1683 | # Clear a bunch of variables before executing the submake |
| | 1684 | |
| | 1685 | ifeq ($(quiet),silent_) |
| | 1686 | tools_silent=s |
| | 1687 | endif |
| | 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 | tools/%: FORCE |
| | 1694 | $(Q)mkdir -p $(objtree)/tools |
| | 1695 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* |
| | 1696 | |
| | 1697 | # Single targets |
| | 1698 | # --------------------------------------------------------------------------- |
| | 1699 | # Single targets are compatible with: |
| | 1700 | # - build with mixed source and output |
| | 1701 | # - build with separate output dir 'make O=...' |
| | 1702 | # - external modules |
| | 1703 | # |
| | 1704 | # target-dir => where to store outputfile |
| | 1705 | # build-dir => directory in kernel source tree to use |
| | 1706 | |
| | 1707 | build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ |
| | 1708 | build-dir = $(patsubst %/,%,$(dir $(build-target))) |
| | 1709 | |
| | 1710 | %.i: prepare FORCE |
| | 1711 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1712 | %.ll: prepare FORCE |
| | 1713 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1714 | %.lst: prepare FORCE |
| | 1715 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1716 | %.o: prepare FORCE |
| | 1717 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1718 | %.s: prepare FORCE |
| | 1719 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1720 | %.symtypes: prepare FORCE |
| | 1721 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) |
| | 1722 | %.ko: %.o |
| | 1723 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1724 | |
| | 1725 | # Modules |
| | 1726 | PHONY += / |
| | 1727 | /: ./ |
| | 1728 | |
| | 1729 | # Make sure the latest headers are built for Documentation |
| | 1730 | Documentation/ samples/: headers_install |
| | 1731 | %/: prepare FORCE |
| | 1732 | $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) |
| | 1733 | |
| | 1734 | # FIXME Should go into a make.lib or something |
| | 1735 | # =========================================================================== |
| | 1736 | |
| | 1737 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| | 1738 | cmd_rmdirs = rm -rf $(rm-dirs) |
| | 1739 | |
| | 1740 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| | 1741 | cmd_rmfiles = rm -f $(rm-files) |
| | 1742 | |
| | 1743 | # Run depmod only if we have System.map and depmod is executable |
| | 1744 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| | 1745 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| | 1746 | $(KERNELRELEASE) |
| | 1747 | |
| | 1748 | # Create temporary dir for module support files |
| | 1749 | # clean it up only when building all modules |
| | 1750 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ |
| | 1751 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) |
| | 1752 | |
| | 1753 | # read saved command lines for existing targets |
| | 1754 | existing-targets := $(wildcard $(sort $(targets))) |
| | 1755 | |
| | 1756 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
| | 1757 | |
| | 1758 | endif # ifeq ($(config-targets),1) |
| | 1759 | endif # ifeq ($(mixed-targets),1) |
| | 1760 | endif # need-sub-make |
| | 1761 | |
| | 1762 | PHONY += FORCE |
| | 1763 | FORCE: |
| | 1764 | |
| | 1765 | # Declare the contents of the PHONY variable as phony. We keep that |
| | 1766 | # information in a variable so we can use it in if_changed and friends. |
| | 1767 | .PHONY: $(PHONY) |
projects / linux-2.6-block.git / blame_incremental