| | 1 | VERSION = 2 |
| | 2 | PATCHLEVEL = 6 |
| | 3 | SUBLEVEL = 24 |
| | 4 | EXTRAVERSION = -rc3 |
| | 5 | NAME = Arr Matey! A Hairy Bilge Rat! |
| | 6 | |
| | 7 | # *DOCUMENTATION* |
| | 8 | # To see a list of typical targets execute "make help" |
| | 9 | # More info can be located in ./README |
| | 10 | # Comments in this file are targeted only to the developer, do not |
| | 11 | # expect to learn how to build the kernel reading this file. |
| | 12 | |
| | 13 | # Do not: |
| | 14 | # o use make's built-in rules and variables |
| | 15 | # (this increases performance and avoid hard-to-debug behavour); |
| | 16 | # o print "Entering directory ..."; |
| | 17 | MAKEFLAGS += -rR --no-print-directory |
| | 18 | |
| | 19 | # We are using a recursive build, so we need to do a little thinking |
| | 20 | # to get the ordering right. |
| | 21 | # |
| | 22 | # Most importantly: sub-Makefiles should only ever modify files in |
| | 23 | # their own directory. If in some directory we have a dependency on |
| | 24 | # a file in another dir (which doesn't happen often, but it's often |
| | 25 | # unavoidable when linking the built-in.o targets which finally |
| | 26 | # turn into vmlinux), we will call a sub make in that other dir, and |
| | 27 | # after that we are sure that everything which is in that other dir |
| | 28 | # is now up to date. |
| | 29 | # |
| | 30 | # The only cases where we need to modify files which have global |
| | 31 | # effects are thus separated out and done before the recursive |
| | 32 | # descending is started. They are now explicitly listed as the |
| | 33 | # prepare rule. |
| | 34 | |
| | 35 | # To put more focus on warnings, be less verbose as default |
| | 36 | # Use 'make V=1' to see the full commands |
| | 37 | |
| | 38 | ifdef V |
| | 39 | ifeq ("$(origin V)", "command line") |
| | 40 | KBUILD_VERBOSE = $(V) |
| | 41 | endif |
| | 42 | endif |
| | 43 | ifndef KBUILD_VERBOSE |
| | 44 | KBUILD_VERBOSE = 0 |
| | 45 | endif |
| | 46 | |
| | 47 | # Call a source code checker (by default, "sparse") as part of the |
| | 48 | # C compilation. |
| | 49 | # |
| | 50 | # Use 'make C=1' to enable checking of only re-compiled files. |
| | 51 | # Use 'make C=2' to enable checking of *all* source files, regardless |
| | 52 | # of whether they are re-compiled or not. |
| | 53 | # |
| | 54 | # See the file "Documentation/sparse.txt" for more details, including |
| | 55 | # where to get the "sparse" utility. |
| | 56 | |
| | 57 | ifdef C |
| | 58 | ifeq ("$(origin C)", "command line") |
| | 59 | KBUILD_CHECKSRC = $(C) |
| | 60 | endif |
| | 61 | endif |
| | 62 | ifndef KBUILD_CHECKSRC |
| | 63 | KBUILD_CHECKSRC = 0 |
| | 64 | endif |
| | 65 | |
| | 66 | # Use make M=dir to specify directory of external module to build |
| | 67 | # Old syntax make ... SUBDIRS=$PWD is still supported |
| | 68 | # Setting the environment variable KBUILD_EXTMOD take precedence |
| | 69 | ifdef SUBDIRS |
| | 70 | KBUILD_EXTMOD ?= $(SUBDIRS) |
| | 71 | endif |
| | 72 | ifdef M |
| | 73 | ifeq ("$(origin M)", "command line") |
| | 74 | KBUILD_EXTMOD := $(M) |
| | 75 | endif |
| | 76 | endif |
| | 77 | |
| | 78 | |
| | 79 | # kbuild supports saving output files in a separate directory. |
| | 80 | # To locate output files in a separate directory two syntaxes are supported. |
| | 81 | # In both cases the working directory must be the root of the kernel src. |
| | 82 | # 1) O= |
| | 83 | # Use "make O=dir/to/store/output/files/" |
| | 84 | # |
| | 85 | # 2) Set KBUILD_OUTPUT |
| | 86 | # Set the environment variable KBUILD_OUTPUT to point to the directory |
| | 87 | # where the output files shall be placed. |
| | 88 | # export KBUILD_OUTPUT=dir/to/store/output/files/ |
| | 89 | # make |
| | 90 | # |
| | 91 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| | 92 | # variable. |
| | 93 | |
| | 94 | |
| | 95 | # KBUILD_SRC is set on invocation of make in OBJ directory |
| | 96 | # KBUILD_SRC is not intended to be used by the regular user (for now) |
| | 97 | ifeq ($(KBUILD_SRC),) |
| | 98 | |
| | 99 | # OK, Make called in directory where kernel src resides |
| | 100 | # Do we want to locate output files in a separate directory? |
| | 101 | ifdef O |
| | 102 | ifeq ("$(origin O)", "command line") |
| | 103 | KBUILD_OUTPUT := $(O) |
| | 104 | endif |
| | 105 | endif |
| | 106 | |
| | 107 | # That's our default target when none is given on the command line |
| | 108 | PHONY := _all |
| | 109 | _all: |
| | 110 | |
| | 111 | ifneq ($(KBUILD_OUTPUT),) |
| | 112 | # Invoke a second make in the output directory, passing relevant variables |
| | 113 | # check that the output directory actually exists |
| | 114 | saved-output := $(KBUILD_OUTPUT) |
| | 115 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) |
| | 116 | $(if $(KBUILD_OUTPUT),, \ |
| | 117 | $(error output directory "$(saved-output)" does not exist)) |
| | 118 | # Check that OUTPUT directory is not the same as where we have kernel src |
| | 119 | $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \ |
| | 120 | $(error Output directory (O=...) specifies kernel src dir)) |
| | 121 | |
| | 122 | PHONY += $(MAKECMDGOALS) sub-make |
| | 123 | |
| | 124 | $(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make |
| | 125 | $(Q)@: |
| | 126 | |
| | 127 | sub-make: FORCE |
| | 128 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
| | 129 | KBUILD_SRC=$(CURDIR) \ |
| | 130 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ |
| | 131 | $(filter-out _all sub-make,$(MAKECMDGOALS)) |
| | 132 | |
| | 133 | # Leave processing to above invocation of make |
| | 134 | skip-makefile := 1 |
| | 135 | endif # ifneq ($(KBUILD_OUTPUT),) |
| | 136 | endif # ifeq ($(KBUILD_SRC),) |
| | 137 | |
| | 138 | # We process the rest of the Makefile if this is the final invocation of make |
| | 139 | ifeq ($(skip-makefile),) |
| | 140 | |
| | 141 | # If building an external module we do not care about the all: rule |
| | 142 | # but instead _all depend on modules |
| | 143 | PHONY += all |
| | 144 | ifeq ($(KBUILD_EXTMOD),) |
| | 145 | _all: all |
| | 146 | else |
| | 147 | _all: modules |
| | 148 | endif |
| | 149 | |
| | 150 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) |
| | 151 | TOPDIR := $(srctree) |
| | 152 | # FIXME - TOPDIR is obsolete, use srctree/objtree |
| | 153 | objtree := $(CURDIR) |
| | 154 | src := $(srctree) |
| | 155 | obj := $(objtree) |
| | 156 | |
| | 157 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
| | 158 | |
| | 159 | export srctree objtree VPATH TOPDIR |
| | 160 | |
| | 161 | |
| | 162 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
| | 163 | # first, and if a usermode build is happening, the "ARCH=um" on the command |
| | 164 | # line overrides the setting of ARCH below. If a native build is happening, |
| | 165 | # then ARCH is assigned, getting whatever value it gets normally, and |
| | 166 | # SUBARCH is subsequently ignored. |
| | 167 | |
| | 168 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ |
| | 169 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
| | 170 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
| | 171 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
| | 172 | -e s/sh[234].*/sh/ ) |
| | 173 | |
| | 174 | # Cross compiling and selecting different set of gcc/bin-utils |
| | 175 | # --------------------------------------------------------------------------- |
| | 176 | # |
| | 177 | # When performing cross compilation for other architectures ARCH shall be set |
| | 178 | # to the target architecture. (See arch/* for the possibilities). |
| | 179 | # ARCH can be set during invocation of make: |
| | 180 | # make ARCH=ia64 |
| | 181 | # Another way is to have ARCH set in the environment. |
| | 182 | # The default ARCH is the host where make is executed. |
| | 183 | |
| | 184 | # CROSS_COMPILE specify the prefix used for all executables used |
| | 185 | # during compilation. Only gcc and related bin-utils executables |
| | 186 | # are prefixed with $(CROSS_COMPILE). |
| | 187 | # CROSS_COMPILE can be set on the command line |
| | 188 | # make CROSS_COMPILE=ia64-linux- |
| | 189 | # Alternatively CROSS_COMPILE can be set in the environment. |
| | 190 | # Default value for CROSS_COMPILE is not to prefix executables |
| | 191 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| | 192 | |
| | 193 | ARCH ?= $(SUBARCH) |
| | 194 | CROSS_COMPILE ?= |
| | 195 | |
| | 196 | # Architecture as present in compile.h |
| | 197 | UTS_MACHINE := $(ARCH) |
| | 198 | SRCARCH := $(ARCH) |
| | 199 | |
| | 200 | # Additional ARCH settings for x86 |
| | 201 | ifeq ($(ARCH),i386) |
| | 202 | SRCARCH := x86 |
| | 203 | K64BIT := n |
| | 204 | endif |
| | 205 | ifeq ($(ARCH),x86_64) |
| | 206 | SRCARCH := x86 |
| | 207 | K64BIT := y |
| | 208 | endif |
| | 209 | |
| | 210 | KCONFIG_CONFIG ?= .config |
| | 211 | |
| | 212 | # SHELL used by kbuild |
| | 213 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
| | 214 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
| | 215 | else echo sh; fi ; fi) |
| | 216 | |
| | 217 | HOSTCC = gcc |
| | 218 | HOSTCXX = g++ |
| | 219 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer |
| | 220 | HOSTCXXFLAGS = -O2 |
| | 221 | |
| | 222 | # Decide whether to build built-in, modular, or both. |
| | 223 | # Normally, just do built-in. |
| | 224 | |
| | 225 | KBUILD_MODULES := |
| | 226 | KBUILD_BUILTIN := 1 |
| | 227 | |
| | 228 | # If we have only "make modules", don't compile built-in objects. |
| | 229 | # When we're building modules with modversions, we need to consider |
| | 230 | # the built-in objects during the descend as well, in order to |
| | 231 | # make sure the checksums are up to date before we record them. |
| | 232 | |
| | 233 | ifeq ($(MAKECMDGOALS),modules) |
| | 234 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
| | 235 | endif |
| | 236 | |
| | 237 | # If we have "make <whatever> modules", compile modules |
| | 238 | # in addition to whatever we do anyway. |
| | 239 | # Just "make" or "make all" shall build modules as well |
| | 240 | |
| | 241 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| | 242 | KBUILD_MODULES := 1 |
| | 243 | endif |
| | 244 | |
| | 245 | ifeq ($(MAKECMDGOALS),) |
| | 246 | KBUILD_MODULES := 1 |
| | 247 | endif |
| | 248 | |
| | 249 | export KBUILD_MODULES KBUILD_BUILTIN |
| | 250 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
| | 251 | |
| | 252 | # Beautify output |
| | 253 | # --------------------------------------------------------------------------- |
| | 254 | # |
| | 255 | # Normally, we echo the whole command before executing it. By making |
| | 256 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| | 257 | # $(quiet) to choose other forms of output instead, e.g. |
| | 258 | # |
| | 259 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| | 260 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| | 261 | # |
| | 262 | # If $(quiet) is empty, the whole command will be printed. |
| | 263 | # If it is set to "quiet_", only the short version will be printed. |
| | 264 | # If it is set to "silent_", nothing will be printed at all, since |
| | 265 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| | 266 | # |
| | 267 | # A simple variant is to prefix commands with $(Q) - that's useful |
| | 268 | # for commands that shall be hidden in non-verbose mode. |
| | 269 | # |
| | 270 | # $(Q)ln $@ :< |
| | 271 | # |
| | 272 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| | 273 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| | 274 | |
| | 275 | ifeq ($(KBUILD_VERBOSE),1) |
| | 276 | quiet = |
| | 277 | Q = |
| | 278 | else |
| | 279 | quiet=quiet_ |
| | 280 | Q = @ |
| | 281 | endif |
| | 282 | |
| | 283 | # If the user is running make -s (silent mode), suppress echoing of |
| | 284 | # commands |
| | 285 | |
| | 286 | ifneq ($(findstring s,$(MAKEFLAGS)),) |
| | 287 | quiet=silent_ |
| | 288 | endif |
| | 289 | |
| | 290 | export quiet Q KBUILD_VERBOSE |
| | 291 | |
| | 292 | |
| | 293 | # Look for make include files relative to root of kernel src |
| | 294 | MAKEFLAGS += --include-dir=$(srctree) |
| | 295 | |
| | 296 | # We need some generic definitions. |
| | 297 | include $(srctree)/scripts/Kbuild.include |
| | 298 | |
| | 299 | # Make variables (CC, etc...) |
| | 300 | |
| | 301 | AS = $(CROSS_COMPILE)as |
| | 302 | LD = $(CROSS_COMPILE)ld |
| | 303 | CC = $(CROSS_COMPILE)gcc |
| | 304 | CPP = $(CC) -E |
| | 305 | AR = $(CROSS_COMPILE)ar |
| | 306 | NM = $(CROSS_COMPILE)nm |
| | 307 | STRIP = $(CROSS_COMPILE)strip |
| | 308 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| | 309 | OBJDUMP = $(CROSS_COMPILE)objdump |
| | 310 | AWK = awk |
| | 311 | GENKSYMS = scripts/genksyms/genksyms |
| | 312 | DEPMOD = /sbin/depmod |
| | 313 | KALLSYMS = scripts/kallsyms |
| | 314 | PERL = perl |
| | 315 | CHECK = sparse |
| | 316 | |
| | 317 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
| | 318 | MODFLAGS = -DMODULE |
| | 319 | CFLAGS_MODULE = $(MODFLAGS) |
| | 320 | AFLAGS_MODULE = $(MODFLAGS) |
| | 321 | LDFLAGS_MODULE = |
| | 322 | CFLAGS_KERNEL = |
| | 323 | AFLAGS_KERNEL = |
| | 324 | |
| | 325 | |
| | 326 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| | 327 | # Needed to be compatible with the O= option |
| | 328 | LINUXINCLUDE := -Iinclude \ |
| | 329 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ |
| | 330 | -include include/linux/autoconf.h |
| | 331 | |
| | 332 | KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) |
| | 333 | |
| | 334 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
| | 335 | -fno-strict-aliasing -fno-common \ |
| | 336 | -Werror-implicit-function-declaration |
| | 337 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
| | 338 | |
| | 339 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
| | 340 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| | 341 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
| | 342 | |
| | 343 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| | 344 | export ARCH SRCARCH K64BIT CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
| | 345 | export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE |
| | 346 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| | 347 | |
| | 348 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
| | 349 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| | 350 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| | 351 | |
| | 352 | # When compiling out-of-tree modules, put MODVERDIR in the module |
| | 353 | # tree rather than in the kernel tree. The kernel tree might |
| | 354 | # even be read-only. |
| | 355 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| | 356 | |
| | 357 | # Files to ignore in find ... statements |
| | 358 | |
| | 359 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o |
| | 360 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| | 361 | |
| | 362 | # =========================================================================== |
| | 363 | # Rules shared between *config targets and build targets |
| | 364 | |
| | 365 | # Basic helpers built in scripts/ |
| | 366 | PHONY += scripts_basic |
| | 367 | scripts_basic: |
| | 368 | $(Q)$(MAKE) $(build)=scripts/basic |
| | 369 | |
| | 370 | # To avoid any implicit rule to kick in, define an empty command. |
| | 371 | scripts/basic/%: scripts_basic ; |
| | 372 | |
| | 373 | PHONY += outputmakefile |
| | 374 | # outputmakefile generates a Makefile in the output directory, if using a |
| | 375 | # separate output directory. This allows convenient use of make in the |
| | 376 | # output directory. |
| | 377 | outputmakefile: |
| | 378 | ifneq ($(KBUILD_SRC),) |
| | 379 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
| | 380 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
| | 381 | endif |
| | 382 | |
| | 383 | # To make sure we do not include .config for any of the *config targets |
| | 384 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| | 385 | # It is allowed to specify more targets when calling make, including |
| | 386 | # mixing *config targets and build targets. |
| | 387 | # For example 'make oldconfig all'. |
| | 388 | # Detect when mixed targets is specified, and make a second invocation |
| | 389 | # of make so .config is not included in this case either (for *config). |
| | 390 | |
| | 391 | no-dot-config-targets := clean mrproper distclean \ |
| | 392 | cscope TAGS tags help %docs check% \ |
| | 393 | include/linux/version.h headers_% \ |
| | 394 | kernelrelease kernelversion |
| | 395 | |
| | 396 | config-targets := 0 |
| | 397 | mixed-targets := 0 |
| | 398 | dot-config := 1 |
| | 399 | |
| | 400 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 401 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 402 | dot-config := 0 |
| | 403 | endif |
| | 404 | endif |
| | 405 | |
| | 406 | ifeq ($(KBUILD_EXTMOD),) |
| | 407 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| | 408 | config-targets := 1 |
| | 409 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
| | 410 | mixed-targets := 1 |
| | 411 | endif |
| | 412 | endif |
| | 413 | endif |
| | 414 | |
| | 415 | ifeq ($(mixed-targets),1) |
| | 416 | # =========================================================================== |
| | 417 | # We're called with mixed targets (*config and build targets). |
| | 418 | # Handle them one by one. |
| | 419 | |
| | 420 | %:: FORCE |
| | 421 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
| | 422 | |
| | 423 | else |
| | 424 | ifeq ($(config-targets),1) |
| | 425 | # =========================================================================== |
| | 426 | # *config targets only - make sure prerequisites are updated, and descend |
| | 427 | # in scripts/kconfig to make the *config target |
| | 428 | |
| | 429 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| | 430 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| | 431 | # used for 'make defconfig' |
| | 432 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| | 433 | export KBUILD_DEFCONFIG |
| | 434 | |
| | 435 | config %config: scripts_basic outputmakefile FORCE |
| | 436 | $(Q)mkdir -p include/linux include/config |
| | 437 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| | 438 | |
| | 439 | else |
| | 440 | # =========================================================================== |
| | 441 | # Build targets only - this includes vmlinux, arch specific targets, clean |
| | 442 | # targets and others. In general all targets except *config targets. |
| | 443 | |
| | 444 | ifeq ($(KBUILD_EXTMOD),) |
| | 445 | # Additional helpers built in scripts/ |
| | 446 | # Carefully list dependencies so we do not try to build scripts twice |
| | 447 | # in parallel |
| | 448 | PHONY += scripts |
| | 449 | scripts: scripts_basic include/config/auto.conf |
| | 450 | $(Q)$(MAKE) $(build)=$(@) |
| | 451 | |
| | 452 | # Objects we will link into vmlinux / subdirs we need to visit |
| | 453 | init-y := init/ |
| | 454 | drivers-y := drivers/ sound/ |
| | 455 | net-y := net/ |
| | 456 | libs-y := lib/ |
| | 457 | core-y := usr/ |
| | 458 | endif # KBUILD_EXTMOD |
| | 459 | |
| | 460 | ifeq ($(dot-config),1) |
| | 461 | # Read in config |
| | 462 | -include include/config/auto.conf |
| | 463 | |
| | 464 | ifeq ($(KBUILD_EXTMOD),) |
| | 465 | # Read in dependencies to all Kconfig* files, make sure to run |
| | 466 | # oldconfig if changes are detected. |
| | 467 | -include include/config/auto.conf.cmd |
| | 468 | |
| | 469 | # To avoid any implicit rule to kick in, define an empty command |
| | 470 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
| | 471 | |
| | 472 | # If .config is newer than include/config/auto.conf, someone tinkered |
| | 473 | # with it and forgot to run make oldconfig. |
| | 474 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
| | 475 | # we execute the config step to be sure to catch updated Kconfig files |
| | 476 | include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
| | 477 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
| | 478 | else |
| | 479 | # external modules needs include/linux/autoconf.h and include/config/auto.conf |
| | 480 | # but do not care if they are up-to-date. Use auto.conf to trigger the test |
| | 481 | PHONY += include/config/auto.conf |
| | 482 | |
| | 483 | include/config/auto.conf: |
| | 484 | $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ |
| | 485 | echo; \ |
| | 486 | echo " ERROR: Kernel configuration is invalid."; \ |
| | 487 | echo " include/linux/autoconf.h or $@ are missing."; \ |
| | 488 | echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| | 489 | echo; \ |
| | 490 | /bin/false) |
| | 491 | |
| | 492 | endif # KBUILD_EXTMOD |
| | 493 | |
| | 494 | else |
| | 495 | # Dummy target needed, because used as prerequisite |
| | 496 | include/config/auto.conf: ; |
| | 497 | endif # $(dot-config) |
| | 498 | |
| | 499 | # The all: target is the default when no target is given on the |
| | 500 | # command line. |
| | 501 | # This allow a user to issue only 'make' to build a kernel including modules |
| | 502 | # Defaults vmlinux but it is usually overridden in the arch makefile |
| | 503 | all: vmlinux |
| | 504 | |
| | 505 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| | 506 | KBUILD_CFLAGS += -Os |
| | 507 | else |
| | 508 | KBUILD_CFLAGS += -O2 |
| | 509 | endif |
| | 510 | |
| | 511 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| | 512 | |
| | 513 | ifdef CONFIG_FRAME_POINTER |
| | 514 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| | 515 | else |
| | 516 | KBUILD_CFLAGS += -fomit-frame-pointer |
| | 517 | endif |
| | 518 | |
| | 519 | ifdef CONFIG_DEBUG_INFO |
| | 520 | KBUILD_CFLAGS += -g |
| | 521 | KBUILD_AFLAGS += -gdwarf-2 |
| | 522 | endif |
| | 523 | |
| | 524 | # Force gcc to behave correct even for buggy distributions |
| | 525 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) |
| | 526 | |
| | 527 | # arch Makefile may override CC so keep this after arch Makefile is included |
| | 528 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| | 529 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
| | 530 | |
| | 531 | # warn about C99 declaration after statement |
| | 532 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
| | 533 | |
| | 534 | # disable pointer signed / unsigned warnings in gcc 4.0 |
| | 535 | KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) |
| | 536 | |
| | 537 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
| | 538 | # But warn user when we do so |
| | 539 | warn-assign = \ |
| | 540 | $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") |
| | 541 | |
| | 542 | ifneq ($(KCPPFLAGS),) |
| | 543 | $(call warn-assign,CPPFLAGS) |
| | 544 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
| | 545 | endif |
| | 546 | ifneq ($(KAFLAGS),) |
| | 547 | $(call warn-assign,AFLAGS) |
| | 548 | KBUILD_AFLAGS += $(KAFLAGS) |
| | 549 | endif |
| | 550 | ifneq ($(KCFLAGS),) |
| | 551 | $(call warn-assign,CFLAGS) |
| | 552 | KBUILD_CFLAGS += $(KCFLAGS) |
| | 553 | endif |
| | 554 | |
| | 555 | # Use --build-id when available. |
| | 556 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ |
| | 557 | $(call ld-option, -Wl$(comma)--build-id,)) |
| | 558 | LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
| | 559 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
| | 560 | |
| | 561 | # Default kernel image to build when no specific target is given. |
| | 562 | # KBUILD_IMAGE may be overruled on the command line or |
| | 563 | # set in the environment |
| | 564 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| | 565 | # this default value |
| | 566 | export KBUILD_IMAGE ?= vmlinux |
| | 567 | |
| | 568 | # |
| | 569 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| | 570 | # images. Default is /boot, but you can set it to other values |
| | 571 | export INSTALL_PATH ?= /boot |
| | 572 | |
| | 573 | # |
| | 574 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| | 575 | # relocations required by build roots. This is not defined in the |
| | 576 | # makefile but the argument can be passed to make if needed. |
| | 577 | # |
| | 578 | |
| | 579 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| | 580 | export MODLIB |
| | 581 | |
| | 582 | # |
| | 583 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
| | 584 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
| | 585 | # the default option --strip-debug will be used. Otherwise, |
| | 586 | # INSTALL_MOD_STRIP will used as the options to the strip command. |
| | 587 | |
| | 588 | ifdef INSTALL_MOD_STRIP |
| | 589 | ifeq ($(INSTALL_MOD_STRIP),1) |
| | 590 | mod_strip_cmd = $(STRIP) --strip-debug |
| | 591 | else |
| | 592 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
| | 593 | endif # INSTALL_MOD_STRIP=1 |
| | 594 | else |
| | 595 | mod_strip_cmd = true |
| | 596 | endif # INSTALL_MOD_STRIP |
| | 597 | export mod_strip_cmd |
| | 598 | |
| | 599 | |
| | 600 | ifeq ($(KBUILD_EXTMOD),) |
| | 601 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
| | 602 | |
| | 603 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ |
| | 604 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| | 605 | $(net-y) $(net-m) $(libs-y) $(libs-m))) |
| | 606 | |
| | 607 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ |
| | 608 | $(init-n) $(init-) \ |
| | 609 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ |
| | 610 | $(net-n) $(net-) $(libs-n) $(libs-)))) |
| | 611 | |
| | 612 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) |
| | 613 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
| | 614 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) |
| | 615 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) |
| | 616 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| | 617 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
| | 618 | libs-y := $(libs-y1) $(libs-y2) |
| | 619 | |
| | 620 | # Build vmlinux |
| | 621 | # --------------------------------------------------------------------------- |
| | 622 | # vmlinux is built from the objects selected by $(vmlinux-init) and |
| | 623 | # $(vmlinux-main). Most are built-in.o files from top-level directories |
| | 624 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. |
| | 625 | # Ordering when linking is important, and $(vmlinux-init) must be first. |
| | 626 | # |
| | 627 | # vmlinux |
| | 628 | # ^ |
| | 629 | # | |
| | 630 | # +-< $(vmlinux-init) |
| | 631 | # | +--< init/version.o + more |
| | 632 | # | |
| | 633 | # +--< $(vmlinux-main) |
| | 634 | # | +--< driver/built-in.o mm/built-in.o + more |
| | 635 | # | |
| | 636 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
| | 637 | # |
| | 638 | # vmlinux version (uname -v) cannot be updated during normal |
| | 639 | # descending-into-subdirs phase since we do not yet know if we need to |
| | 640 | # update vmlinux. |
| | 641 | # Therefore this step is delayed until just before final link of vmlinux - |
| | 642 | # except in the kallsyms case where it is done just before adding the |
| | 643 | # symbols to the kernel. |
| | 644 | # |
| | 645 | # System.map is generated to document addresses of all kernel symbols |
| | 646 | |
| | 647 | vmlinux-init := $(head-y) $(init-y) |
| | 648 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) |
| | 649 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) |
| | 650 | vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds |
| | 651 | export KBUILD_VMLINUX_OBJS := $(vmlinux-all) |
| | 652 | |
| | 653 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS |
| | 654 | # May be overridden by arch/$(ARCH)/Makefile |
| | 655 | quiet_cmd_vmlinux__ ?= LD $@ |
| | 656 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ |
| | 657 | -T $(vmlinux-lds) $(vmlinux-init) \ |
| | 658 | --start-group $(vmlinux-main) --end-group \ |
| | 659 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) |
| | 660 | |
| | 661 | # Generate new vmlinux version |
| | 662 | quiet_cmd_vmlinux_version = GEN .version |
| | 663 | cmd_vmlinux_version = set -e; \ |
| | 664 | if [ ! -r .version ]; then \ |
| | 665 | rm -f .version; \ |
| | 666 | echo 1 >.version; \ |
| | 667 | else \ |
| | 668 | mv .version .old_version; \ |
| | 669 | expr 0$$(cat .old_version) + 1 >.version; \ |
| | 670 | fi; \ |
| | 671 | $(MAKE) $(build)=init |
| | 672 | |
| | 673 | # Generate System.map |
| | 674 | quiet_cmd_sysmap = SYSMAP |
| | 675 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
| | 676 | |
| | 677 | # Link of vmlinux |
| | 678 | # If CONFIG_KALLSYMS is set .version is already updated |
| | 679 | # Generate System.map and verify that the content is consistent |
| | 680 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
| | 681 | # First command is ':' to allow us to use + in front of the rule |
| | 682 | define rule_vmlinux__ |
| | 683 | : |
| | 684 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
| | 685 | |
| | 686 | $(call cmd,vmlinux__) |
| | 687 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd |
| | 688 | |
| | 689 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
| | 690 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ |
| | 691 | $(cmd_sysmap) $@ System.map; \ |
| | 692 | if [ $$? -ne 0 ]; then \ |
| | 693 | rm -f $@; \ |
| | 694 | /bin/false; \ |
| | 695 | fi; |
| | 696 | $(verify_kallsyms) |
| | 697 | endef |
| | 698 | |
| | 699 | |
| | 700 | ifdef CONFIG_KALLSYMS |
| | 701 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) |
| | 702 | # It's a three stage process: |
| | 703 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is |
| | 704 | # empty |
| | 705 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
| | 706 | # the right size - vmlinux version (uname -v) is updated during this step |
| | 707 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, |
| | 708 | # but due to the added section, some addresses have shifted. |
| | 709 | # From here, we generate a correct .tmp_kallsyms2.o |
| | 710 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. |
| | 711 | # o Verify that the System.map from vmlinux matches the map from |
| | 712 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. |
| | 713 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using |
| | 714 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a |
| | 715 | # temporary bypass to allow the kernel to be built while the |
| | 716 | # maintainers work out what went wrong with kallsyms. |
| | 717 | |
| | 718 | ifdef CONFIG_KALLSYMS_EXTRA_PASS |
| | 719 | last_kallsyms := 3 |
| | 720 | else |
| | 721 | last_kallsyms := 2 |
| | 722 | endif |
| | 723 | |
| | 724 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
| | 725 | |
| | 726 | define verify_kallsyms |
| | 727 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
| | 728 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
| | 729 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map |
| | 730 | $(Q)cmp -s System.map .tmp_System.map || \ |
| | 731 | (echo Inconsistent kallsyms data; \ |
| | 732 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ |
| | 733 | rm .tmp_kallsyms* ; /bin/false ) |
| | 734 | endef |
| | 735 | |
| | 736 | # Update vmlinux version before link |
| | 737 | # Use + in front of this rule to silent warning about make -j1 |
| | 738 | # First command is ':' to allow us to use + in front of this rule |
| | 739 | cmd_ksym_ld = $(cmd_vmlinux__) |
| | 740 | define rule_ksym_ld |
| | 741 | : |
| | 742 | +$(call cmd,vmlinux_version) |
| | 743 | $(call cmd,vmlinux__) |
| | 744 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd |
| | 745 | endef |
| | 746 | |
| | 747 | # Generate .S file with all kernel symbols |
| | 748 | quiet_cmd_kallsyms = KSYM $@ |
| | 749 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
| | 750 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
| | 751 | |
| | 752 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
| | 753 | $(call if_changed_dep,as_o_S) |
| | 754 | |
| | 755 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) |
| | 756 | $(call cmd,kallsyms) |
| | 757 | |
| | 758 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version |
| | 759 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE |
| | 760 | $(call if_changed_rule,ksym_ld) |
| | 761 | |
| | 762 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE |
| | 763 | $(call if_changed,vmlinux__) |
| | 764 | |
| | 765 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE |
| | 766 | $(call if_changed,vmlinux__) |
| | 767 | |
| | 768 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
| | 769 | $(KALLSYMS): scripts ; |
| | 770 | |
| | 771 | # Generate some data for debugging strange kallsyms problems |
| | 772 | debug_kallsyms: .tmp_map$(last_kallsyms) |
| | 773 | |
| | 774 | .tmp_map%: .tmp_vmlinux% FORCE |
| | 775 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
| | 776 | |
| | 777 | .tmp_map3: .tmp_map2 |
| | 778 | |
| | 779 | .tmp_map2: .tmp_map1 |
| | 780 | |
| | 781 | endif # ifdef CONFIG_KALLSYMS |
| | 782 | |
| | 783 | # Do modpost on a prelinked vmlinux. The finally linked vmlinux has |
| | 784 | # relevant sections renamed as per the linker script. |
| | 785 | quiet_cmd_vmlinux-modpost = LD $@ |
| | 786 | cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ |
| | 787 | $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ |
| | 788 | $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^) |
| | 789 | define rule_vmlinux-modpost |
| | 790 | : |
| | 791 | +$(call cmd,vmlinux-modpost) |
| | 792 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ |
| | 793 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd |
| | 794 | endef |
| | 795 | |
| | 796 | # vmlinux image - including updated kernel symbols |
| | 797 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE |
| | 798 | ifdef CONFIG_HEADERS_CHECK |
| | 799 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
| | 800 | endif |
| | 801 | ifdef CONFIG_SAMPLES |
| | 802 | $(Q)$(MAKE) $(build)=samples |
| | 803 | endif |
| | 804 | $(call vmlinux-modpost) |
| | 805 | $(call if_changed_rule,vmlinux__) |
| | 806 | $(Q)rm -f .old_version |
| | 807 | |
| | 808 | vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE |
| | 809 | $(call if_changed_rule,vmlinux-modpost) |
| | 810 | |
| | 811 | # The actual objects are generated when descending, |
| | 812 | # make sure no implicit rule kicks in |
| | 813 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; |
| | 814 | |
| | 815 | # Handle descending into subdirectories listed in $(vmlinux-dirs) |
| | 816 | # Preset locale variables to speed up the build process. Limit locale |
| | 817 | # tweaks to this spot to avoid wrong language settings when running |
| | 818 | # make menuconfig etc. |
| | 819 | # Error messages still appears in the original language |
| | 820 | |
| | 821 | PHONY += $(vmlinux-dirs) |
| | 822 | $(vmlinux-dirs): prepare scripts |
| | 823 | $(Q)$(MAKE) $(build)=$@ |
| | 824 | |
| | 825 | # Build the kernel release string |
| | 826 | # |
| | 827 | # The KERNELRELEASE value built here is stored in the file |
| | 828 | # include/config/kernel.release, and is used when executing several |
| | 829 | # make targets, such as "make install" or "make modules_install." |
| | 830 | # |
| | 831 | # The eventual kernel release string consists of the following fields, |
| | 832 | # shown in a hierarchical format to show how smaller parts are concatenated |
| | 833 | # to form the larger and final value, with values coming from places like |
| | 834 | # the Makefile, kernel config options, make command line options and/or |
| | 835 | # SCM tag information. |
| | 836 | # |
| | 837 | # $(KERNELVERSION) |
| | 838 | # $(VERSION) eg, 2 |
| | 839 | # $(PATCHLEVEL) eg, 6 |
| | 840 | # $(SUBLEVEL) eg, 18 |
| | 841 | # $(EXTRAVERSION) eg, -rc6 |
| | 842 | # $(localver-full) |
| | 843 | # $(localver) |
| | 844 | # localversion* (files without backups, containing '~') |
| | 845 | # $(CONFIG_LOCALVERSION) (from kernel config setting) |
| | 846 | # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) |
| | 847 | # ./scripts/setlocalversion (SCM tag, if one exists) |
| | 848 | # $(LOCALVERSION) (from make command line if provided) |
| | 849 | # |
| | 850 | # Note how the final $(localver-auto) string is included *only* if the |
| | 851 | # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the |
| | 852 | # moment, only git is supported but other SCMs can edit the script |
| | 853 | # scripts/setlocalversion and add the appropriate checks as needed. |
| | 854 | |
| | 855 | pattern = ".*/localversion[^~]*" |
| | 856 | string = $(shell cat /dev/null \ |
| | 857 | `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) |
| | 858 | |
| | 859 | localver = $(subst $(space),, $(string) \ |
| | 860 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) |
| | 861 | |
| | 862 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
| | 863 | # and if the SCM is know a tag from the SCM is appended. |
| | 864 | # The appended tag is determined by the SCM used. |
| | 865 | # |
| | 866 | # Currently, only git is supported. |
| | 867 | # Other SCMs can edit scripts/setlocalversion and add the appropriate |
| | 868 | # checks as needed. |
| | 869 | ifdef CONFIG_LOCALVERSION_AUTO |
| | 870 | _localver-auto = $(shell $(CONFIG_SHELL) \ |
| | 871 | $(srctree)/scripts/setlocalversion $(srctree)) |
| | 872 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
| | 873 | endif |
| | 874 | |
| | 875 | localver-full = $(localver)$(localver-auto) |
| | 876 | |
| | 877 | # Store (new) KERNELRELASE string in include/config/kernel.release |
| | 878 | kernelrelease = $(KERNELVERSION)$(localver-full) |
| | 879 | include/config/kernel.release: include/config/auto.conf FORCE |
| | 880 | $(Q)rm -f $@ |
| | 881 | $(Q)echo $(kernelrelease) > $@ |
| | 882 | |
| | 883 | |
| | 884 | # Things we need to do before we recursively start building the kernel |
| | 885 | # or the modules are listed in "prepare". |
| | 886 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| | 887 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| | 888 | # version.h and scripts_basic is processed / created. |
| | 889 | |
| | 890 | # Listed in dependency order |
| | 891 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
| | 892 | |
| | 893 | # prepare3 is used to check if we are building in a separate output directory, |
| | 894 | # and if so do: |
| | 895 | # 1) Check that make has not been executed in the kernel src $(srctree) |
| | 896 | # 2) Create the include2 directory, used for the second asm symlink |
| | 897 | prepare3: include/config/kernel.release |
| | 898 | ifneq ($(KBUILD_SRC),) |
| | 899 | @echo ' Using $(srctree) as source for kernel' |
| | 900 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
| | 901 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
| | 902 | echo " in the '$(srctree)' directory.";\ |
| | 903 | /bin/false; \ |
| | 904 | fi; |
| | 905 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; |
| | 906 | $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm |
| | 907 | endif |
| | 908 | |
| | 909 | # prepare2 creates a makefile if using a separate output directory |
| | 910 | prepare2: prepare3 outputmakefile |
| | 911 | |
| | 912 | prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ |
| | 913 | include/asm include/config/auto.conf |
| | 914 | $(cmd_crmodverdir) |
| | 915 | |
| | 916 | archprepare: prepare1 scripts_basic |
| | 917 | |
| | 918 | prepare0: archprepare FORCE |
| | 919 | $(Q)$(MAKE) $(build)=. |
| | 920 | $(Q)$(MAKE) $(build)=. missing-syscalls |
| | 921 | |
| | 922 | # All the preparing.. |
| | 923 | prepare: prepare0 |
| | 924 | |
| | 925 | # Leave this as default for preprocessing vmlinux.lds.S, which is now |
| | 926 | # done in arch/$(ARCH)/kernel/Makefile |
| | 927 | |
| | 928 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) |
| | 929 | |
| | 930 | # The asm symlink changes when $(ARCH) changes. |
| | 931 | # Detect this and ask user to run make mrproper |
| | 932 | |
| | 933 | include/asm: FORCE |
| | 934 | $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ |
| | 935 | if [ -L include/asm ]; then \ |
| | 936 | if [ "$$asmlink" != "$(SRCARCH)" ]; then \ |
| | 937 | echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ |
| | 938 | echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ |
| | 939 | exit 1; \ |
| | 940 | fi; \ |
| | 941 | else \ |
| | 942 | echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ |
| | 943 | if [ ! -d include ]; then \ |
| | 944 | mkdir -p include; \ |
| | 945 | fi; \ |
| | 946 | ln -fsn asm-$(SRCARCH) $@; \ |
| | 947 | fi |
| | 948 | |
| | 949 | # Generate some files |
| | 950 | # --------------------------------------------------------------------------- |
| | 951 | |
| | 952 | # KERNELRELEASE can change from a few different places, meaning version.h |
| | 953 | # needs to be updated, so this check is forced on all builds |
| | 954 | |
| | 955 | uts_len := 64 |
| | 956 | define filechk_utsrelease.h |
| | 957 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| | 958 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| | 959 | exit 1; \ |
| | 960 | fi; \ |
| | 961 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) |
| | 962 | endef |
| | 963 | |
| | 964 | define filechk_version.h |
| | 965 | (echo \#define LINUX_VERSION_CODE $(shell \ |
| | 966 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ |
| | 967 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
| | 968 | endef |
| | 969 | |
| | 970 | include/linux/version.h: $(srctree)/Makefile FORCE |
| | 971 | $(call filechk,version.h) |
| | 972 | |
| | 973 | include/linux/utsrelease.h: include/config/kernel.release FORCE |
| | 974 | $(call filechk,utsrelease.h) |
| | 975 | |
| | 976 | # --------------------------------------------------------------------------- |
| | 977 | |
| | 978 | PHONY += depend dep |
| | 979 | depend dep: |
| | 980 | @echo '*** Warning: make $@ is unnecessary now.' |
| | 981 | |
| | 982 | # --------------------------------------------------------------------------- |
| | 983 | # Kernel headers |
| | 984 | INSTALL_HDR_PATH=$(objtree)/usr |
| | 985 | export INSTALL_HDR_PATH |
| | 986 | |
| | 987 | HDRFILTER=generic i386 x86_64 |
| | 988 | HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) |
| | 989 | |
| | 990 | PHONY += headers_install_all |
| | 991 | headers_install_all: include/linux/version.h scripts_basic FORCE |
| | 992 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
| | 993 | $(Q)for arch in $(HDRARCHES); do \ |
| | 994 | $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ |
| | 995 | done |
| | 996 | |
| | 997 | PHONY += headers_install |
| | 998 | headers_install: include/linux/version.h scripts_basic FORCE |
| | 999 | @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
| | 1000 | echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ |
| | 1001 | exit 1 ; fi |
| | 1002 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
| | 1003 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include |
| | 1004 | |
| | 1005 | PHONY += headers_check_all |
| | 1006 | headers_check_all: headers_install_all |
| | 1007 | $(Q)for arch in $(HDRARCHES); do \ |
| | 1008 | $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ |
| | 1009 | done |
| | 1010 | |
| | 1011 | PHONY += headers_check |
| | 1012 | headers_check: headers_install |
| | 1013 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 |
| | 1014 | |
| | 1015 | # --------------------------------------------------------------------------- |
| | 1016 | # Modules |
| | 1017 | |
| | 1018 | ifdef CONFIG_MODULES |
| | 1019 | |
| | 1020 | # By default, build modules as well |
| | 1021 | |
| | 1022 | all: modules |
| | 1023 | |
| | 1024 | # Build modules |
| | 1025 | |
| | 1026 | PHONY += modules |
| | 1027 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) |
| | 1028 | @echo ' Building modules, stage 2.'; |
| | 1029 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1030 | |
| | 1031 | |
| | 1032 | # Target to prepare building external modules |
| | 1033 | PHONY += modules_prepare |
| | 1034 | modules_prepare: prepare scripts |
| | 1035 | |
| | 1036 | # Target to install modules |
| | 1037 | PHONY += modules_install |
| | 1038 | modules_install: _modinst_ _modinst_post |
| | 1039 | |
| | 1040 | PHONY += _modinst_ |
| | 1041 | _modinst_: |
| | 1042 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
| | 1043 | echo "Warning: you may need to install module-init-tools"; \ |
| | 1044 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ |
| | 1045 | sleep 1; \ |
| | 1046 | fi |
| | 1047 | @rm -rf $(MODLIB)/kernel |
| | 1048 | @rm -f $(MODLIB)/source |
| | 1049 | @mkdir -p $(MODLIB)/kernel |
| | 1050 | @ln -s $(srctree) $(MODLIB)/source |
| | 1051 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| | 1052 | rm -f $(MODLIB)/build ; \ |
| | 1053 | ln -s $(objtree) $(MODLIB)/build ; \ |
| | 1054 | fi |
| | 1055 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| | 1056 | |
| | 1057 | # This depmod is only for convenience to give the initial |
| | 1058 | # boot a modules.dep even before / is mounted read-write. However the |
| | 1059 | # boot script depmod is the master version. |
| | 1060 | PHONY += _modinst_post |
| | 1061 | _modinst_post: _modinst_ |
| | 1062 | $(call cmd,depmod) |
| | 1063 | |
| | 1064 | else # CONFIG_MODULES |
| | 1065 | |
| | 1066 | # Modules not configured |
| | 1067 | # --------------------------------------------------------------------------- |
| | 1068 | |
| | 1069 | modules modules_install: FORCE |
| | 1070 | @echo |
| | 1071 | @echo "The present kernel configuration has modules disabled." |
| | 1072 | @echo "Type 'make config' and enable loadable module support." |
| | 1073 | @echo "Then build a kernel with module support enabled." |
| | 1074 | @echo |
| | 1075 | @exit 1 |
| | 1076 | |
| | 1077 | endif # CONFIG_MODULES |
| | 1078 | |
| | 1079 | ### |
| | 1080 | # Cleaning is done on three levels. |
| | 1081 | # make clean Delete most generated files |
| | 1082 | # Leave enough to build external modules |
| | 1083 | # make mrproper Delete the current configuration, and all generated files |
| | 1084 | # make distclean Remove editor backup files, patch leftover files and the like |
| | 1085 | |
| | 1086 | # Directories & files removed with 'make clean' |
| | 1087 | CLEAN_DIRS += $(MODVERDIR) |
| | 1088 | CLEAN_FILES += vmlinux System.map \ |
| | 1089 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map |
| | 1090 | |
| | 1091 | # Directories & files removed with 'make mrproper' |
| | 1092 | MRPROPER_DIRS += include/config include2 usr/include |
| | 1093 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
| | 1094 | include/linux/autoconf.h include/linux/version.h \ |
| | 1095 | include/linux/utsrelease.h \ |
| | 1096 | Module.symvers tags TAGS cscope* |
| | 1097 | |
| | 1098 | # clean - Delete most, but leave enough to build external modules |
| | 1099 | # |
| | 1100 | clean: rm-dirs := $(CLEAN_DIRS) |
| | 1101 | clean: rm-files := $(CLEAN_FILES) |
| | 1102 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) |
| | 1103 | |
| | 1104 | PHONY += $(clean-dirs) clean archclean |
| | 1105 | $(clean-dirs): |
| | 1106 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| | 1107 | |
| | 1108 | clean: archclean $(clean-dirs) |
| | 1109 | $(call cmd,rmdirs) |
| | 1110 | $(call cmd,rmfiles) |
| | 1111 | @find . $(RCS_FIND_IGNORE) \ |
| | 1112 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
| | 1113 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| | 1114 | -o -name '*.symtypes' \) \ |
| | 1115 | -type f -print | xargs rm -f |
| | 1116 | |
| | 1117 | # mrproper - Delete all generated files, including .config |
| | 1118 | # |
| | 1119 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| | 1120 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| | 1121 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) |
| | 1122 | |
| | 1123 | PHONY += $(mrproper-dirs) mrproper archmrproper |
| | 1124 | $(mrproper-dirs): |
| | 1125 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| | 1126 | |
| | 1127 | mrproper: clean archmrproper $(mrproper-dirs) |
| | 1128 | $(call cmd,rmdirs) |
| | 1129 | $(call cmd,rmfiles) |
| | 1130 | |
| | 1131 | # distclean |
| | 1132 | # |
| | 1133 | PHONY += distclean |
| | 1134 | |
| | 1135 | distclean: mrproper |
| | 1136 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
| | 1137 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| | 1138 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
| | 1139 | -o -name '.*.rej' -o -size 0 \ |
| | 1140 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
| | 1141 | -type f -print | xargs rm -f |
| | 1142 | |
| | 1143 | |
| | 1144 | # Packaging of the kernel to various formats |
| | 1145 | # --------------------------------------------------------------------------- |
| | 1146 | # rpm target kept for backward compatibility |
| | 1147 | package-dir := $(srctree)/scripts/package |
| | 1148 | |
| | 1149 | %pkg: include/config/kernel.release FORCE |
| | 1150 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1151 | rpm: include/config/kernel.release FORCE |
| | 1152 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1153 | |
| | 1154 | |
| | 1155 | # Brief documentation of the typical targets used |
| | 1156 | # --------------------------------------------------------------------------- |
| | 1157 | |
| | 1158 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) |
| | 1159 | boards := $(notdir $(boards)) |
| | 1160 | |
| | 1161 | help: |
| | 1162 | @echo 'Cleaning targets:' |
| | 1163 | @echo ' clean - Remove most generated files but keep the config and' |
| | 1164 | @echo ' enough build support to build external modules' |
| | 1165 | @echo ' mrproper - Remove all generated files + config + various backup files' |
| | 1166 | @echo ' distclean - mrproper + remove editor backup and patch files' |
| | 1167 | @echo '' |
| | 1168 | @echo 'Configuration targets:' |
| | 1169 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| | 1170 | @echo '' |
| | 1171 | @echo 'Other generic targets:' |
| | 1172 | @echo ' all - Build all targets marked with [*]' |
| | 1173 | @echo '* vmlinux - Build the bare kernel' |
| | 1174 | @echo '* modules - Build all modules' |
| | 1175 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| | 1176 | @echo ' dir/ - Build all files in dir and below' |
| | 1177 | @echo ' dir/file.[ois] - Build specified target only' |
| | 1178 | @echo ' dir/file.ko - Build module including final link' |
| | 1179 | @echo ' rpm - Build a kernel as an RPM package' |
| | 1180 | @echo ' tags/TAGS - Generate tags file for editors' |
| | 1181 | @echo ' cscope - Generate cscope index' |
| | 1182 | @echo ' kernelrelease - Output the release version string' |
| | 1183 | @echo ' kernelversion - Output the version stored in Makefile' |
| | 1184 | @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
| | 1185 | echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| | 1186 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| | 1187 | fi |
| | 1188 | @echo '' |
| | 1189 | @echo 'Static analysers' |
| | 1190 | @echo ' checkstack - Generate a list of stack hogs' |
| | 1191 | @echo ' namespacecheck - Name space analysis on compiled kernel' |
| | 1192 | @echo ' export_report - List the usages of all exported symbols' |
| | 1193 | @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
| | 1194 | echo ' headers_check - Sanity check on exported headers'; \ |
| | 1195 | fi |
| | 1196 | @echo '' |
| | 1197 | @echo 'Kernel packaging:' |
| | 1198 | @$(MAKE) $(build)=$(package-dir) help |
| | 1199 | @echo '' |
| | 1200 | @echo 'Documentation targets:' |
| | 1201 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp |
| | 1202 | @echo '' |
| | 1203 | @echo 'Architecture specific targets ($(ARCH)):' |
| | 1204 | @$(if $(archhelp),$(archhelp),\ |
| | 1205 | echo ' No architecture specific help defined for $(ARCH)') |
| | 1206 | @echo '' |
| | 1207 | @$(if $(boards), \ |
| | 1208 | $(foreach b, $(boards), \ |
| | 1209 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| | 1210 | echo '') |
| | 1211 | |
| | 1212 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| | 1213 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| | 1214 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| | 1215 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
| | 1216 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| | 1217 | @echo '' |
| | 1218 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| | 1219 | @echo 'For further info see the ./README file' |
| | 1220 | |
| | 1221 | |
| | 1222 | # Documentation targets |
| | 1223 | # --------------------------------------------------------------------------- |
| | 1224 | %docs: scripts_basic FORCE |
| | 1225 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
| | 1226 | |
| | 1227 | else # KBUILD_EXTMOD |
| | 1228 | |
| | 1229 | ### |
| | 1230 | # External module support. |
| | 1231 | # When building external modules the kernel used as basis is considered |
| | 1232 | # read-only, and no consistency checks are made and the make |
| | 1233 | # system is not used on the basis kernel. If updates are required |
| | 1234 | # in the basis kernel ordinary make commands (without M=...) must |
| | 1235 | # be used. |
| | 1236 | # |
| | 1237 | # The following are the only valid targets when building external |
| | 1238 | # modules. |
| | 1239 | # make M=dir clean Delete all automatically generated files |
| | 1240 | # make M=dir modules Make all modules in specified dir |
| | 1241 | # make M=dir Same as 'make M=dir modules' |
| | 1242 | # make M=dir modules_install |
| | 1243 | # Install the modules built in the module directory |
| | 1244 | # Assumes install directory is already created |
| | 1245 | |
| | 1246 | # We are always building modules |
| | 1247 | KBUILD_MODULES := 1 |
| | 1248 | PHONY += crmodverdir |
| | 1249 | crmodverdir: |
| | 1250 | $(cmd_crmodverdir) |
| | 1251 | |
| | 1252 | PHONY += $(objtree)/Module.symvers |
| | 1253 | $(objtree)/Module.symvers: |
| | 1254 | @test -e $(objtree)/Module.symvers || ( \ |
| | 1255 | echo; \ |
| | 1256 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
| | 1257 | echo " is missing; modules will have no dependencies and modversions."; \ |
| | 1258 | echo ) |
| | 1259 | |
| | 1260 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
| | 1261 | PHONY += $(module-dirs) modules |
| | 1262 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
| | 1263 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
| | 1264 | |
| | 1265 | modules: $(module-dirs) |
| | 1266 | @echo ' Building modules, stage 2.'; |
| | 1267 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1268 | |
| | 1269 | PHONY += modules_install |
| | 1270 | modules_install: _emodinst_ _emodinst_post |
| | 1271 | |
| | 1272 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
| | 1273 | PHONY += _emodinst_ |
| | 1274 | _emodinst_: |
| | 1275 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
| | 1276 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| | 1277 | |
| | 1278 | PHONY += _emodinst_post |
| | 1279 | _emodinst_post: _emodinst_ |
| | 1280 | $(call cmd,depmod) |
| | 1281 | |
| | 1282 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
| | 1283 | |
| | 1284 | PHONY += $(clean-dirs) clean |
| | 1285 | $(clean-dirs): |
| | 1286 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| | 1287 | |
| | 1288 | clean: rm-dirs := $(MODVERDIR) |
| | 1289 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
| | 1290 | clean: $(clean-dirs) |
| | 1291 | $(call cmd,rmdirs) |
| | 1292 | $(call cmd,rmfiles) |
| | 1293 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
| | 1294 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
| | 1295 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
| | 1296 | -type f -print | xargs rm -f |
| | 1297 | |
| | 1298 | help: |
| | 1299 | @echo ' Building external modules.' |
| | 1300 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| | 1301 | @echo '' |
| | 1302 | @echo ' modules - default target, build the module(s)' |
| | 1303 | @echo ' modules_install - install the module' |
| | 1304 | @echo ' clean - remove generated files in module directory only' |
| | 1305 | @echo '' |
| | 1306 | |
| | 1307 | # Dummies... |
| | 1308 | PHONY += prepare scripts |
| | 1309 | prepare: ; |
| | 1310 | scripts: ; |
| | 1311 | endif # KBUILD_EXTMOD |
| | 1312 | |
| | 1313 | # Generate tags for editors |
| | 1314 | # --------------------------------------------------------------------------- |
| | 1315 | |
| | 1316 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set |
| | 1317 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. |
| | 1318 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! |
| | 1319 | |
| | 1320 | ifeq ($(src),$(obj)) |
| | 1321 | __srctree = |
| | 1322 | else |
| | 1323 | __srctree = $(srctree)/ |
| | 1324 | endif |
| | 1325 | |
| | 1326 | ifeq ($(ALLSOURCE_ARCHS),) |
| | 1327 | ifeq ($(ARCH),um) |
| | 1328 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) |
| | 1329 | else |
| | 1330 | ALLINCLUDE_ARCHS := $(SRCARCH) |
| | 1331 | endif |
| | 1332 | else |
| | 1333 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. |
| | 1334 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
| | 1335 | endif |
| | 1336 | |
| | 1337 | ALLSOURCE_ARCHS := $(SRCARCH) |
| | 1338 | |
| | 1339 | define find-sources |
| | 1340 | ( for arch in $(ALLSOURCE_ARCHS) ; do \ |
| | 1341 | find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ |
| | 1342 | -name $1 -print; \ |
| | 1343 | done ; \ |
| | 1344 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
| | 1345 | -name $1 -print; \ |
| | 1346 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
| | 1347 | \( -name config -o -name 'asm-*' \) -prune \ |
| | 1348 | -o -name $1 -print; \ |
| | 1349 | for arch in $(ALLINCLUDE_ARCHS) ; do \ |
| | 1350 | find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ |
| | 1351 | -name $1 -print; \ |
| | 1352 | done ; \ |
| | 1353 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
| | 1354 | -name $1 -print; \ |
| | 1355 | find $(__srctree) $(RCS_FIND_IGNORE) \ |
| | 1356 | \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ |
| | 1357 | -name $1 -print; \ |
| | 1358 | ) |
| | 1359 | endef |
| | 1360 | |
| | 1361 | define all-sources |
| | 1362 | $(call find-sources,'*.[chS]') |
| | 1363 | endef |
| | 1364 | define all-kconfigs |
| | 1365 | $(call find-sources,'Kconfig*') |
| | 1366 | endef |
| | 1367 | define all-defconfigs |
| | 1368 | $(call find-sources,'defconfig') |
| | 1369 | endef |
| | 1370 | |
| | 1371 | define xtags |
| | 1372 | if $1 --version 2>&1 | grep -iq exuberant; then \ |
| | 1373 | $(all-sources) | xargs $1 -a \ |
| | 1374 | -I __initdata,__exitdata,__acquires,__releases \ |
| | 1375 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
| | 1376 | --extra=+f --c-kinds=+px \ |
| | 1377 | --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ |
| | 1378 | $(all-kconfigs) | xargs $1 -a \ |
| | 1379 | --langdef=kconfig \ |
| | 1380 | --language-force=kconfig \ |
| | 1381 | --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ |
| | 1382 | $(all-defconfigs) | xargs -r $1 -a \ |
| | 1383 | --langdef=dotconfig \ |
| | 1384 | --language-force=dotconfig \ |
| | 1385 | --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ |
| | 1386 | elif $1 --version 2>&1 | grep -iq emacs; then \ |
| | 1387 | $(all-sources) | xargs $1 -a; \ |
| | 1388 | $(all-kconfigs) | xargs $1 -a \ |
| | 1389 | --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ |
| | 1390 | $(all-defconfigs) | xargs -r $1 -a \ |
| | 1391 | --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ |
| | 1392 | else \ |
| | 1393 | $(all-sources) | xargs $1 -a; \ |
| | 1394 | fi |
| | 1395 | endef |
| | 1396 | |
| | 1397 | quiet_cmd_cscope-file = FILELST cscope.files |
| | 1398 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
| | 1399 | |
| | 1400 | quiet_cmd_cscope = MAKE cscope.out |
| | 1401 | cmd_cscope = cscope -b |
| | 1402 | |
| | 1403 | cscope: FORCE |
| | 1404 | $(call cmd,cscope-file) |
| | 1405 | $(call cmd,cscope) |
| | 1406 | |
| | 1407 | quiet_cmd_TAGS = MAKE $@ |
| | 1408 | define cmd_TAGS |
| | 1409 | rm -f $@; \ |
| | 1410 | $(call xtags,etags) |
| | 1411 | endef |
| | 1412 | |
| | 1413 | TAGS: FORCE |
| | 1414 | $(call cmd,TAGS) |
| | 1415 | |
| | 1416 | quiet_cmd_tags = MAKE $@ |
| | 1417 | define cmd_tags |
| | 1418 | rm -f $@; \ |
| | 1419 | $(call xtags,ctags) |
| | 1420 | endef |
| | 1421 | |
| | 1422 | tags: FORCE |
| | 1423 | $(call cmd,tags) |
| | 1424 | |
| | 1425 | |
| | 1426 | # Scripts to check various things for consistency |
| | 1427 | # --------------------------------------------------------------------------- |
| | 1428 | |
| | 1429 | includecheck: |
| | 1430 | find * $(RCS_FIND_IGNORE) \ |
| | 1431 | -name '*.[hcS]' -type f -print | sort \ |
| | 1432 | | xargs $(PERL) -w scripts/checkincludes.pl |
| | 1433 | |
| | 1434 | versioncheck: |
| | 1435 | find * $(RCS_FIND_IGNORE) \ |
| | 1436 | -name '*.[hcS]' -type f -print | sort \ |
| | 1437 | | xargs $(PERL) -w scripts/checkversion.pl |
| | 1438 | |
| | 1439 | namespacecheck: |
| | 1440 | $(PERL) $(srctree)/scripts/namespace.pl |
| | 1441 | |
| | 1442 | export_report: |
| | 1443 | $(PERL) $(srctree)/scripts/export_report.pl |
| | 1444 | |
| | 1445 | endif #ifeq ($(config-targets),1) |
| | 1446 | endif #ifeq ($(mixed-targets),1) |
| | 1447 | |
| | 1448 | PHONY += checkstack kernelrelease kernelversion |
| | 1449 | |
| | 1450 | # UML needs a little special treatment here. It wants to use the host |
| | 1451 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| | 1452 | # else wants $(ARCH), including people doing cross-builds, which means |
| | 1453 | # that $(SUBARCH) doesn't work here. |
| | 1454 | ifeq ($(ARCH), um) |
| | 1455 | CHECKSTACK_ARCH := $(SUBARCH) |
| | 1456 | else |
| | 1457 | CHECKSTACK_ARCH := $(ARCH) |
| | 1458 | endif |
| | 1459 | checkstack: |
| | 1460 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| | 1461 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| | 1462 | |
| | 1463 | kernelrelease: |
| | 1464 | $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ |
| | 1465 | $(error kernelrelease not valid - run 'make prepare' to update it)) |
| | 1466 | kernelversion: |
| | 1467 | @echo $(KERNELVERSION) |
| | 1468 | |
| | 1469 | # Single targets |
| | 1470 | # --------------------------------------------------------------------------- |
| | 1471 | # Single targets are compatible with: |
| | 1472 | # - build whith mixed source and output |
| | 1473 | # - build with separate output dir 'make O=...' |
| | 1474 | # - external modules |
| | 1475 | # |
| | 1476 | # target-dir => where to store outputfile |
| | 1477 | # build-dir => directory in kernel source tree to use |
| | 1478 | |
| | 1479 | ifeq ($(KBUILD_EXTMOD),) |
| | 1480 | build-dir = $(patsubst %/,%,$(dir $@)) |
| | 1481 | target-dir = $(dir $@) |
| | 1482 | else |
| | 1483 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
| | 1484 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
| | 1485 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
| | 1486 | endif |
| | 1487 | |
| | 1488 | %.s: %.c prepare scripts FORCE |
| | 1489 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1490 | %.i: %.c prepare scripts FORCE |
| | 1491 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1492 | %.o: %.c prepare scripts FORCE |
| | 1493 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1494 | %.lst: %.c prepare scripts FORCE |
| | 1495 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1496 | %.s: %.S prepare scripts FORCE |
| | 1497 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1498 | %.o: %.S prepare scripts FORCE |
| | 1499 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1500 | %.symtypes: %.c prepare scripts FORCE |
| | 1501 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1502 | |
| | 1503 | # Modules |
| | 1504 | / %/: prepare scripts FORCE |
| | 1505 | $(cmd_crmodverdir) |
| | 1506 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| | 1507 | $(build)=$(build-dir) |
| | 1508 | %.ko: prepare scripts FORCE |
| | 1509 | $(cmd_crmodverdir) |
| | 1510 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| | 1511 | $(build)=$(build-dir) $(@:.ko=.o) |
| | 1512 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1513 | |
| | 1514 | # FIXME Should go into a make.lib or something |
| | 1515 | # =========================================================================== |
| | 1516 | |
| | 1517 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| | 1518 | cmd_rmdirs = rm -rf $(rm-dirs) |
| | 1519 | |
| | 1520 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| | 1521 | cmd_rmfiles = rm -f $(rm-files) |
| | 1522 | |
| | 1523 | # Run depmod only is we have System.map and depmod is executable |
| | 1524 | # and we build for the host arch |
| | 1525 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| | 1526 | cmd_depmod = \ |
| | 1527 | if [ -r System.map -a -x $(DEPMOD) ]; then \ |
| | 1528 | $(DEPMOD) -ae -F System.map \ |
| | 1529 | $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ |
| | 1530 | $(KERNELRELEASE); \ |
| | 1531 | fi |
| | 1532 | |
| | 1533 | # Create temporary dir for module support files |
| | 1534 | # clean it up only when building all modules |
| | 1535 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ |
| | 1536 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) |
| | 1537 | |
| | 1538 | a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ |
| | 1539 | $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ |
| | 1540 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) |
| | 1541 | |
| | 1542 | quiet_cmd_as_o_S = AS $@ |
| | 1543 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| | 1544 | |
| | 1545 | # read all saved command lines |
| | 1546 | |
| | 1547 | targets := $(wildcard $(sort $(targets))) |
| | 1548 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| | 1549 | |
| | 1550 | ifneq ($(cmd_files),) |
| | 1551 | $(cmd_files): ; # Do not try to update included dependency files |
| | 1552 | include $(cmd_files) |
| | 1553 | endif |
| | 1554 | |
| | 1555 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
| | 1556 | # Usage: |
| | 1557 | # $(Q)$(MAKE) $(clean)=dir |
| | 1558 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
| | 1559 | |
| | 1560 | endif # skip-makefile |
| | 1561 | |
| | 1562 | PHONY += FORCE |
| | 1563 | FORCE: |
| | 1564 | |
| | 1565 | # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes. |
| | 1566 | Makefile: ; |
| | 1567 | |
| | 1568 | # Declare the contents of the .PHONY variable as phony. We keep that |
| | 1569 | # information in a variable se we can use it in if_changed and friends. |
| | 1570 | .PHONY: $(PHONY) |
projects / mirror_ubuntu-artful-kernel.git / blame_incremental