| | 1 | VERSION = 3 |
| | 2 | PATCHLEVEL = 4 |
| | 3 | SUBLEVEL = 0 |
| | 4 | EXTRAVERSION = |
| | 5 | NAME = Saber-toothed Squirrel |
| | 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 avoids hard-to-debug behaviour); |
| | 16 | # o print "Entering directory ..."; |
| | 17 | MAKEFLAGS += -rR --no-print-directory |
| | 18 | |
| | 19 | # Avoid funny character set dependencies |
| | 20 | unexport LC_ALL |
| | 21 | LC_COLLATE=C |
| | 22 | LC_NUMERIC=C |
| | 23 | export LC_COLLATE LC_NUMERIC |
| | 24 | |
| | 25 | # We are using a recursive build, so we need to do a little thinking |
| | 26 | # to get the ordering right. |
| | 27 | # |
| | 28 | # Most importantly: sub-Makefiles should only ever modify files in |
| | 29 | # their own directory. If in some directory we have a dependency on |
| | 30 | # a file in another dir (which doesn't happen often, but it's often |
| | 31 | # unavoidable when linking the built-in.o targets which finally |
| | 32 | # turn into vmlinux), we will call a sub make in that other dir, and |
| | 33 | # after that we are sure that everything which is in that other dir |
| | 34 | # is now up to date. |
| | 35 | # |
| | 36 | # The only cases where we need to modify files which have global |
| | 37 | # effects are thus separated out and done before the recursive |
| | 38 | # descending is started. They are now explicitly listed as the |
| | 39 | # prepare rule. |
| | 40 | |
| | 41 | # To put more focus on warnings, be less verbose as default |
| | 42 | # Use 'make V=1' to see the full commands |
| | 43 | |
| | 44 | ifeq ("$(origin V)", "command line") |
| | 45 | KBUILD_VERBOSE = $(V) |
| | 46 | endif |
| | 47 | ifndef KBUILD_VERBOSE |
| | 48 | KBUILD_VERBOSE = 0 |
| | 49 | endif |
| | 50 | |
| | 51 | # Call a source code checker (by default, "sparse") as part of the |
| | 52 | # C compilation. |
| | 53 | # |
| | 54 | # Use 'make C=1' to enable checking of only re-compiled files. |
| | 55 | # Use 'make C=2' to enable checking of *all* source files, regardless |
| | 56 | # of whether they are re-compiled or not. |
| | 57 | # |
| | 58 | # See the file "Documentation/sparse.txt" for more details, including |
| | 59 | # where to get the "sparse" utility. |
| | 60 | |
| | 61 | ifeq ("$(origin C)", "command line") |
| | 62 | KBUILD_CHECKSRC = $(C) |
| | 63 | endif |
| | 64 | ifndef KBUILD_CHECKSRC |
| | 65 | KBUILD_CHECKSRC = 0 |
| | 66 | endif |
| | 67 | |
| | 68 | # Use make M=dir to specify directory of external module to build |
| | 69 | # Old syntax make ... SUBDIRS=$PWD is still supported |
| | 70 | # Setting the environment variable KBUILD_EXTMOD take precedence |
| | 71 | ifdef SUBDIRS |
| | 72 | KBUILD_EXTMOD ?= $(SUBDIRS) |
| | 73 | endif |
| | 74 | |
| | 75 | ifeq ("$(origin M)", "command line") |
| | 76 | KBUILD_EXTMOD := $(M) |
| | 77 | endif |
| | 78 | |
| | 79 | # kbuild supports saving output files in a separate directory. |
| | 80 | # To locate output files in a separate directory two syntaxes are supported. |
| | 81 | # In both cases the working directory must be the root of the kernel src. |
| | 82 | # 1) O= |
| | 83 | # Use "make O=dir/to/store/output/files/" |
| | 84 | # |
| | 85 | # 2) Set KBUILD_OUTPUT |
| | 86 | # Set the environment variable KBUILD_OUTPUT to point to the directory |
| | 87 | # where the output files shall be placed. |
| | 88 | # export KBUILD_OUTPUT=dir/to/store/output/files/ |
| | 89 | # make |
| | 90 | # |
| | 91 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| | 92 | # variable. |
| | 93 | |
| | 94 | |
| | 95 | # KBUILD_SRC is set on invocation of make in OBJ directory |
| | 96 | # KBUILD_SRC is not intended to be used by the regular user (for now) |
| | 97 | ifeq ($(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 | ifeq ("$(origin O)", "command line") |
| | 102 | KBUILD_OUTPUT := $(O) |
| | 103 | endif |
| | 104 | |
| | 105 | ifeq ("$(origin W)", "command line") |
| | 106 | export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) |
| | 107 | endif |
| | 108 | |
| | 109 | # That's our default target when none is given on the command line |
| | 110 | PHONY := _all |
| | 111 | _all: |
| | 112 | |
| | 113 | # Cancel implicit rules on top Makefile |
| | 114 | $(CURDIR)/Makefile Makefile: ; |
| | 115 | |
| | 116 | ifneq ($(KBUILD_OUTPUT),) |
| | 117 | # Invoke a second make in the output directory, passing relevant variables |
| | 118 | # check that the output directory actually exists |
| | 119 | saved-output := $(KBUILD_OUTPUT) |
| | 120 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) |
| | 121 | $(if $(KBUILD_OUTPUT),, \ |
| | 122 | $(error output directory "$(saved-output)" does not exist)) |
| | 123 | |
| | 124 | PHONY += $(MAKECMDGOALS) sub-make |
| | 125 | |
| | 126 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
| | 127 | $(Q)@: |
| | 128 | |
| | 129 | sub-make: FORCE |
| | 130 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
| | 131 | KBUILD_SRC=$(CURDIR) \ |
| | 132 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ |
| | 133 | $(filter-out _all sub-make,$(MAKECMDGOALS)) |
| | 134 | |
| | 135 | # Leave processing to above invocation of make |
| | 136 | skip-makefile := 1 |
| | 137 | endif # ifneq ($(KBUILD_OUTPUT),) |
| | 138 | endif # ifeq ($(KBUILD_SRC),) |
| | 139 | |
| | 140 | # We process the rest of the Makefile if this is the final invocation of make |
| | 141 | ifeq ($(skip-makefile),) |
| | 142 | |
| | 143 | # If building an external module we do not care about the all: rule |
| | 144 | # but instead _all depend on modules |
| | 145 | PHONY += all |
| | 146 | ifeq ($(KBUILD_EXTMOD),) |
| | 147 | _all: all |
| | 148 | else |
| | 149 | _all: modules |
| | 150 | endif |
| | 151 | |
| | 152 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) |
| | 153 | objtree := $(CURDIR) |
| | 154 | src := $(srctree) |
| | 155 | obj := $(objtree) |
| | 156 | |
| | 157 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
| | 158 | |
| | 159 | export srctree objtree VPATH |
| | 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 | # A third alternative is to store a setting in .config so that plain |
| | 191 | # "make" in the configured kernel build directory always uses that. |
| | 192 | # Default value for CROSS_COMPILE is not to prefix executables |
| | 193 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| | 194 | export KBUILD_BUILDHOST := $(SUBARCH) |
| | 195 | ARCH ?= $(SUBARCH) |
| | 196 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) |
| | 197 | |
| | 198 | # Architecture as present in compile.h |
| | 199 | UTS_MACHINE := $(ARCH) |
| | 200 | SRCARCH := $(ARCH) |
| | 201 | |
| | 202 | # Additional ARCH settings for x86 |
| | 203 | ifeq ($(ARCH),i386) |
| | 204 | SRCARCH := x86 |
| | 205 | endif |
| | 206 | ifeq ($(ARCH),x86_64) |
| | 207 | SRCARCH := x86 |
| | 208 | endif |
| | 209 | |
| | 210 | # Additional ARCH settings for sparc |
| | 211 | ifeq ($(ARCH),sparc32) |
| | 212 | SRCARCH := sparc |
| | 213 | endif |
| | 214 | ifeq ($(ARCH),sparc64) |
| | 215 | SRCARCH := sparc |
| | 216 | endif |
| | 217 | |
| | 218 | # Additional ARCH settings for sh |
| | 219 | ifeq ($(ARCH),sh64) |
| | 220 | SRCARCH := sh |
| | 221 | endif |
| | 222 | |
| | 223 | # Additional ARCH settings for tile |
| | 224 | ifeq ($(ARCH),tilepro) |
| | 225 | SRCARCH := tile |
| | 226 | endif |
| | 227 | ifeq ($(ARCH),tilegx) |
| | 228 | SRCARCH := tile |
| | 229 | endif |
| | 230 | |
| | 231 | # Where to locate arch specific headers |
| | 232 | hdr-arch := $(SRCARCH) |
| | 233 | |
| | 234 | ifeq ($(ARCH),m68knommu) |
| | 235 | hdr-arch := m68k |
| | 236 | endif |
| | 237 | |
| | 238 | KCONFIG_CONFIG ?= .config |
| | 239 | export KCONFIG_CONFIG |
| | 240 | |
| | 241 | # SHELL used by kbuild |
| | 242 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
| | 243 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
| | 244 | else echo sh; fi ; fi) |
| | 245 | |
| | 246 | HOSTCC = gcc |
| | 247 | HOSTCXX = g++ |
| | 248 | HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer |
| | 249 | HOSTCXXFLAGS = -O2 |
| | 250 | |
| | 251 | # Decide whether to build built-in, modular, or both. |
| | 252 | # Normally, just do built-in. |
| | 253 | |
| | 254 | KBUILD_MODULES := |
| | 255 | KBUILD_BUILTIN := 1 |
| | 256 | |
| | 257 | # If we have only "make modules", don't compile built-in objects. |
| | 258 | # When we're building modules with modversions, we need to consider |
| | 259 | # the built-in objects during the descend as well, in order to |
| | 260 | # make sure the checksums are up to date before we record them. |
| | 261 | |
| | 262 | ifeq ($(MAKECMDGOALS),modules) |
| | 263 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
| | 264 | endif |
| | 265 | |
| | 266 | # If we have "make <whatever> modules", compile modules |
| | 267 | # in addition to whatever we do anyway. |
| | 268 | # Just "make" or "make all" shall build modules as well |
| | 269 | |
| | 270 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| | 271 | KBUILD_MODULES := 1 |
| | 272 | endif |
| | 273 | |
| | 274 | ifeq ($(MAKECMDGOALS),) |
| | 275 | KBUILD_MODULES := 1 |
| | 276 | endif |
| | 277 | |
| | 278 | export KBUILD_MODULES KBUILD_BUILTIN |
| | 279 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
| | 280 | |
| | 281 | # Beautify output |
| | 282 | # --------------------------------------------------------------------------- |
| | 283 | # |
| | 284 | # Normally, we echo the whole command before executing it. By making |
| | 285 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| | 286 | # $(quiet) to choose other forms of output instead, e.g. |
| | 287 | # |
| | 288 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| | 289 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| | 290 | # |
| | 291 | # If $(quiet) is empty, the whole command will be printed. |
| | 292 | # If it is set to "quiet_", only the short version will be printed. |
| | 293 | # If it is set to "silent_", nothing will be printed at all, since |
| | 294 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| | 295 | # |
| | 296 | # A simple variant is to prefix commands with $(Q) - that's useful |
| | 297 | # for commands that shall be hidden in non-verbose mode. |
| | 298 | # |
| | 299 | # $(Q)ln $@ :< |
| | 300 | # |
| | 301 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| | 302 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| | 303 | |
| | 304 | ifeq ($(KBUILD_VERBOSE),1) |
| | 305 | quiet = |
| | 306 | Q = |
| | 307 | else |
| | 308 | quiet=quiet_ |
| | 309 | Q = @ |
| | 310 | endif |
| | 311 | |
| | 312 | # If the user is running make -s (silent mode), suppress echoing of |
| | 313 | # commands |
| | 314 | |
| | 315 | ifneq ($(filter s% -s%,$(MAKEFLAGS)),) |
| | 316 | quiet=silent_ |
| | 317 | endif |
| | 318 | |
| | 319 | export quiet Q KBUILD_VERBOSE |
| | 320 | |
| | 321 | |
| | 322 | # Look for make include files relative to root of kernel src |
| | 323 | MAKEFLAGS += --include-dir=$(srctree) |
| | 324 | |
| | 325 | # We need some generic definitions (do not try to remake the file). |
| | 326 | $(srctree)/scripts/Kbuild.include: ; |
| | 327 | include $(srctree)/scripts/Kbuild.include |
| | 328 | |
| | 329 | # Make variables (CC, etc...) |
| | 330 | |
| | 331 | AS = $(CROSS_COMPILE)as |
| | 332 | LD = $(CROSS_COMPILE)ld |
| | 333 | CC = $(CROSS_COMPILE)gcc |
| | 334 | CPP = $(CC) -E |
| | 335 | AR = $(CROSS_COMPILE)ar |
| | 336 | NM = $(CROSS_COMPILE)nm |
| | 337 | STRIP = $(CROSS_COMPILE)strip |
| | 338 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| | 339 | OBJDUMP = $(CROSS_COMPILE)objdump |
| | 340 | AWK = awk |
| | 341 | GENKSYMS = scripts/genksyms/genksyms |
| | 342 | INSTALLKERNEL := installkernel |
| | 343 | DEPMOD = /sbin/depmod |
| | 344 | KALLSYMS = scripts/kallsyms |
| | 345 | PERL = perl |
| | 346 | CHECK = sparse |
| | 347 | |
| | 348 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| | 349 | -Wbitwise -Wno-return-void $(CF) |
| | 350 | CFLAGS_MODULE = |
| | 351 | AFLAGS_MODULE = |
| | 352 | LDFLAGS_MODULE = |
| | 353 | CFLAGS_KERNEL = |
| | 354 | AFLAGS_KERNEL = |
| | 355 | CFLAGS_GCOV = -fprofile-arcs -ftest-coverage |
| | 356 | |
| | 357 | |
| | 358 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| | 359 | # Needed to be compatible with the O= option |
| | 360 | LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \ |
| | 361 | -Iarch/$(hdr-arch)/include/generated -Iinclude \ |
| | 362 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
| | 363 | -include $(srctree)/include/linux/kconfig.h |
| | 364 | |
| | 365 | KBUILD_CPPFLAGS := -D__KERNEL__ |
| | 366 | |
| | 367 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
| | 368 | -fno-strict-aliasing -fno-common \ |
| | 369 | -Werror-implicit-function-declaration \ |
| | 370 | -Wno-format-security \ |
| | 371 | -fno-delete-null-pointer-checks |
| | 372 | KBUILD_AFLAGS_KERNEL := |
| | 373 | KBUILD_CFLAGS_KERNEL := |
| | 374 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
| | 375 | KBUILD_AFLAGS_MODULE := -DMODULE |
| | 376 | KBUILD_CFLAGS_MODULE := -DMODULE |
| | 377 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds |
| | 378 | |
| | 379 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
| | 380 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| | 381 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| | 382 | |
| | 383 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| | 384 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
| | 385 | export CPP AR NM STRIP OBJCOPY OBJDUMP |
| | 386 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE |
| | 387 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| | 388 | |
| | 389 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
| | 390 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV |
| | 391 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| | 392 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| | 393 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
| | 394 | export KBUILD_ARFLAGS |
| | 395 | |
| | 396 | # When compiling out-of-tree modules, put MODVERDIR in the module |
| | 397 | # tree rather than in the kernel tree. The kernel tree might |
| | 398 | # even be read-only. |
| | 399 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| | 400 | |
| | 401 | # Files to ignore in find ... statements |
| | 402 | |
| | 403 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \ |
| | 404 | -o -name .pc -o -name .hg -o -name .git \) -prune -o |
| | 405 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| | 406 | --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| | 407 | |
| | 408 | # =========================================================================== |
| | 409 | # Rules shared between *config targets and build targets |
| | 410 | |
| | 411 | # Basic helpers built in scripts/ |
| | 412 | PHONY += scripts_basic |
| | 413 | scripts_basic: |
| | 414 | $(Q)$(MAKE) $(build)=scripts/basic |
| | 415 | $(Q)rm -f .tmp_quiet_recordmcount |
| | 416 | |
| | 417 | # To avoid any implicit rule to kick in, define an empty command. |
| | 418 | scripts/basic/%: scripts_basic ; |
| | 419 | |
| | 420 | PHONY += outputmakefile |
| | 421 | # outputmakefile generates a Makefile in the output directory, if using a |
| | 422 | # separate output directory. This allows convenient use of make in the |
| | 423 | # output directory. |
| | 424 | outputmakefile: |
| | 425 | ifneq ($(KBUILD_SRC),) |
| | 426 | $(Q)ln -fsn $(srctree) source |
| | 427 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
| | 428 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
| | 429 | endif |
| | 430 | |
| | 431 | # Support for using generic headers in asm-generic |
| | 432 | PHONY += asm-generic |
| | 433 | asm-generic: |
| | 434 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
| | 435 | obj=arch/$(SRCARCH)/include/generated/asm |
| | 436 | |
| | 437 | # To make sure we do not include .config for any of the *config targets |
| | 438 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| | 439 | # It is allowed to specify more targets when calling make, including |
| | 440 | # mixing *config targets and build targets. |
| | 441 | # For example 'make oldconfig all'. |
| | 442 | # Detect when mixed targets is specified, and make a second invocation |
| | 443 | # of make so .config is not included in this case either (for *config). |
| | 444 | |
| | 445 | no-dot-config-targets := clean mrproper distclean \ |
| | 446 | cscope gtags TAGS tags help %docs check% coccicheck \ |
| | 447 | include/linux/version.h headers_% archheaders archscripts \ |
| | 448 | kernelversion %src-pkg |
| | 449 | |
| | 450 | config-targets := 0 |
| | 451 | mixed-targets := 0 |
| | 452 | dot-config := 1 |
| | 453 | |
| | 454 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 455 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| | 456 | dot-config := 0 |
| | 457 | endif |
| | 458 | endif |
| | 459 | |
| | 460 | ifeq ($(KBUILD_EXTMOD),) |
| | 461 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| | 462 | config-targets := 1 |
| | 463 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
| | 464 | mixed-targets := 1 |
| | 465 | endif |
| | 466 | endif |
| | 467 | endif |
| | 468 | |
| | 469 | ifeq ($(mixed-targets),1) |
| | 470 | # =========================================================================== |
| | 471 | # We're called with mixed targets (*config and build targets). |
| | 472 | # Handle them one by one. |
| | 473 | |
| | 474 | %:: FORCE |
| | 475 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
| | 476 | |
| | 477 | else |
| | 478 | ifeq ($(config-targets),1) |
| | 479 | # =========================================================================== |
| | 480 | # *config targets only - make sure prerequisites are updated, and descend |
| | 481 | # in scripts/kconfig to make the *config target |
| | 482 | |
| | 483 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| | 484 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| | 485 | # used for 'make defconfig' |
| | 486 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| | 487 | export KBUILD_DEFCONFIG KBUILD_KCONFIG |
| | 488 | |
| | 489 | config: scripts_basic outputmakefile FORCE |
| | 490 | $(Q)mkdir -p include/linux include/config |
| | 491 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| | 492 | |
| | 493 | %config: scripts_basic outputmakefile FORCE |
| | 494 | $(Q)mkdir -p include/linux include/config |
| | 495 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| | 496 | |
| | 497 | else |
| | 498 | # =========================================================================== |
| | 499 | # Build targets only - this includes vmlinux, arch specific targets, clean |
| | 500 | # targets and others. In general all targets except *config targets. |
| | 501 | |
| | 502 | ifeq ($(KBUILD_EXTMOD),) |
| | 503 | # Additional helpers built in scripts/ |
| | 504 | # Carefully list dependencies so we do not try to build scripts twice |
| | 505 | # in parallel |
| | 506 | PHONY += scripts |
| | 507 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf |
| | 508 | $(Q)$(MAKE) $(build)=$(@) |
| | 509 | |
| | 510 | # Objects we will link into vmlinux / subdirs we need to visit |
| | 511 | init-y := init/ |
| | 512 | drivers-y := drivers/ sound/ firmware/ |
| | 513 | net-y := net/ |
| | 514 | libs-y := lib/ |
| | 515 | core-y := usr/ |
| | 516 | endif # KBUILD_EXTMOD |
| | 517 | |
| | 518 | ifeq ($(dot-config),1) |
| | 519 | # Read in config |
| | 520 | -include include/config/auto.conf |
| | 521 | |
| | 522 | ifeq ($(KBUILD_EXTMOD),) |
| | 523 | # Read in dependencies to all Kconfig* files, make sure to run |
| | 524 | # oldconfig if changes are detected. |
| | 525 | -include include/config/auto.conf.cmd |
| | 526 | |
| | 527 | # To avoid any implicit rule to kick in, define an empty command |
| | 528 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
| | 529 | |
| | 530 | # If .config is newer than include/config/auto.conf, someone tinkered |
| | 531 | # with it and forgot to run make oldconfig. |
| | 532 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
| | 533 | # we execute the config step to be sure to catch updated Kconfig files |
| | 534 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
| | 535 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
| | 536 | else |
| | 537 | # external modules needs include/generated/autoconf.h and include/config/auto.conf |
| | 538 | # but do not care if they are up-to-date. Use auto.conf to trigger the test |
| | 539 | PHONY += include/config/auto.conf |
| | 540 | |
| | 541 | include/config/auto.conf: |
| | 542 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
| | 543 | echo; \ |
| | 544 | echo " ERROR: Kernel configuration is invalid."; \ |
| | 545 | echo " include/generated/autoconf.h or $@ are missing.";\ |
| | 546 | echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| | 547 | echo; \ |
| | 548 | /bin/false) |
| | 549 | |
| | 550 | endif # KBUILD_EXTMOD |
| | 551 | |
| | 552 | else |
| | 553 | # Dummy target needed, because used as prerequisite |
| | 554 | include/config/auto.conf: ; |
| | 555 | endif # $(dot-config) |
| | 556 | |
| | 557 | # The all: target is the default when no target is given on the |
| | 558 | # command line. |
| | 559 | # This allow a user to issue only 'make' to build a kernel including modules |
| | 560 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
| | 561 | all: vmlinux |
| | 562 | |
| | 563 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| | 564 | KBUILD_CFLAGS += -Os |
| | 565 | else |
| | 566 | KBUILD_CFLAGS += -O2 |
| | 567 | endif |
| | 568 | |
| | 569 | ifdef CONFIG_READABLE_ASM |
| | 570 | # Disable optimizations that make assembler listings hard to read. |
| | 571 | # reorder blocks reorders the control in the function |
| | 572 | # ipa clone creates specialized cloned functions |
| | 573 | # partial inlining inlines only parts of functions |
| | 574 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ |
| | 575 | $(call cc-option,-fno-ipa-cp-clone,) \ |
| | 576 | $(call cc-option,-fno-partial-inlining) |
| | 577 | endif |
| | 578 | |
| | 579 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| | 580 | |
| | 581 | ifneq ($(CONFIG_FRAME_WARN),0) |
| | 582 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
| | 583 | endif |
| | 584 | |
| | 585 | # Force gcc to behave correct even for buggy distributions |
| | 586 | ifndef CONFIG_CC_STACKPROTECTOR |
| | 587 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) |
| | 588 | endif |
| | 589 | |
| | 590 | # This warning generated too much noise in a regular build. |
| | 591 | # Use make W=1 to enable this warning (see scripts/Makefile.build) |
| | 592 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |
| | 593 | |
| | 594 | ifdef CONFIG_FRAME_POINTER |
| | 595 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| | 596 | else |
| | 597 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
| | 598 | # pointers. For those, we don't have FUNCTION_TRACER automatically |
| | 599 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is |
| | 600 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use |
| | 601 | # -fomit-frame-pointer with FUNCTION_TRACER. |
| | 602 | ifndef CONFIG_FUNCTION_TRACER |
| | 603 | KBUILD_CFLAGS += -fomit-frame-pointer |
| | 604 | endif |
| | 605 | endif |
| | 606 | |
| | 607 | ifdef CONFIG_DEBUG_INFO |
| | 608 | KBUILD_CFLAGS += -g |
| | 609 | KBUILD_AFLAGS += -gdwarf-2 |
| | 610 | endif |
| | 611 | |
| | 612 | ifdef CONFIG_DEBUG_INFO_REDUCED |
| | 613 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) |
| | 614 | endif |
| | 615 | |
| | 616 | ifdef CONFIG_FUNCTION_TRACER |
| | 617 | KBUILD_CFLAGS += -pg |
| | 618 | ifdef CONFIG_DYNAMIC_FTRACE |
| | 619 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
| | 620 | BUILD_C_RECORDMCOUNT := y |
| | 621 | export BUILD_C_RECORDMCOUNT |
| | 622 | endif |
| | 623 | endif |
| | 624 | endif |
| | 625 | |
| | 626 | # We trigger additional mismatches with less inlining |
| | 627 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| | 628 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) |
| | 629 | endif |
| | 630 | |
| | 631 | # arch Makefile may override CC so keep this after arch Makefile is included |
| | 632 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| | 633 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
| | 634 | |
| | 635 | # warn about C99 declaration after statement |
| | 636 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
| | 637 | |
| | 638 | # disable pointer signed / unsigned warnings in gcc 4.0 |
| | 639 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
| | 640 | |
| | 641 | # disable invalid "can't wrap" optimizations for signed / pointers |
| | 642 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
| | 643 | |
| | 644 | # conserve stack if available |
| | 645 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) |
| | 646 | |
| | 647 | # use the deterministic mode of AR if available |
| | 648 | KBUILD_ARFLAGS := $(call ar-option,D) |
| | 649 | |
| | 650 | # check for 'asm goto' |
| | 651 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) |
| | 652 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO |
| | 653 | endif |
| | 654 | |
| | 655 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
| | 656 | # But warn user when we do so |
| | 657 | warn-assign = \ |
| | 658 | $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") |
| | 659 | |
| | 660 | ifneq ($(KCPPFLAGS),) |
| | 661 | $(call warn-assign,CPPFLAGS) |
| | 662 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
| | 663 | endif |
| | 664 | ifneq ($(KAFLAGS),) |
| | 665 | $(call warn-assign,AFLAGS) |
| | 666 | KBUILD_AFLAGS += $(KAFLAGS) |
| | 667 | endif |
| | 668 | ifneq ($(KCFLAGS),) |
| | 669 | $(call warn-assign,CFLAGS) |
| | 670 | KBUILD_CFLAGS += $(KCFLAGS) |
| | 671 | endif |
| | 672 | |
| | 673 | # Use --build-id when available. |
| | 674 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ |
| | 675 | $(call cc-ldoption, -Wl$(comma)--build-id,)) |
| | 676 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
| | 677 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
| | 678 | |
| | 679 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
| | 680 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
| | 681 | endif |
| | 682 | |
| | 683 | # Default kernel image to build when no specific target is given. |
| | 684 | # KBUILD_IMAGE may be overruled on the command line or |
| | 685 | # set in the environment |
| | 686 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| | 687 | # this default value |
| | 688 | export KBUILD_IMAGE ?= vmlinux |
| | 689 | |
| | 690 | # |
| | 691 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| | 692 | # images. Default is /boot, but you can set it to other values |
| | 693 | export INSTALL_PATH ?= /boot |
| | 694 | |
| | 695 | # |
| | 696 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| | 697 | # relocations required by build roots. This is not defined in the |
| | 698 | # makefile but the argument can be passed to make if needed. |
| | 699 | # |
| | 700 | |
| | 701 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| | 702 | export MODLIB |
| | 703 | |
| | 704 | # |
| | 705 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
| | 706 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
| | 707 | # the default option --strip-debug will be used. Otherwise, |
| | 708 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. |
| | 709 | |
| | 710 | ifdef INSTALL_MOD_STRIP |
| | 711 | ifeq ($(INSTALL_MOD_STRIP),1) |
| | 712 | mod_strip_cmd = $(STRIP) --strip-debug |
| | 713 | else |
| | 714 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
| | 715 | endif # INSTALL_MOD_STRIP=1 |
| | 716 | else |
| | 717 | mod_strip_cmd = true |
| | 718 | endif # INSTALL_MOD_STRIP |
| | 719 | export mod_strip_cmd |
| | 720 | |
| | 721 | |
| | 722 | ifeq ($(KBUILD_EXTMOD),) |
| | 723 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
| | 724 | |
| | 725 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ |
| | 726 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| | 727 | $(net-y) $(net-m) $(libs-y) $(libs-m))) |
| | 728 | |
| | 729 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ |
| | 730 | $(init-n) $(init-) \ |
| | 731 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ |
| | 732 | $(net-n) $(net-) $(libs-n) $(libs-)))) |
| | 733 | |
| | 734 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) |
| | 735 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
| | 736 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) |
| | 737 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) |
| | 738 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| | 739 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
| | 740 | libs-y := $(libs-y1) $(libs-y2) |
| | 741 | |
| | 742 | # Build vmlinux |
| | 743 | # --------------------------------------------------------------------------- |
| | 744 | # vmlinux is built from the objects selected by $(vmlinux-init) and |
| | 745 | # $(vmlinux-main). Most are built-in.o files from top-level directories |
| | 746 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. |
| | 747 | # Ordering when linking is important, and $(vmlinux-init) must be first. |
| | 748 | # |
| | 749 | # vmlinux |
| | 750 | # ^ |
| | 751 | # | |
| | 752 | # +-< $(vmlinux-init) |
| | 753 | # | +--< init/version.o + more |
| | 754 | # | |
| | 755 | # +--< $(vmlinux-main) |
| | 756 | # | +--< driver/built-in.o mm/built-in.o + more |
| | 757 | # | |
| | 758 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
| | 759 | # |
| | 760 | # vmlinux version (uname -v) cannot be updated during normal |
| | 761 | # descending-into-subdirs phase since we do not yet know if we need to |
| | 762 | # update vmlinux. |
| | 763 | # Therefore this step is delayed until just before final link of vmlinux - |
| | 764 | # except in the kallsyms case where it is done just before adding the |
| | 765 | # symbols to the kernel. |
| | 766 | # |
| | 767 | # System.map is generated to document addresses of all kernel symbols |
| | 768 | |
| | 769 | vmlinux-init := $(head-y) $(init-y) |
| | 770 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) |
| | 771 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) |
| | 772 | vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds |
| | 773 | export KBUILD_VMLINUX_OBJS := $(vmlinux-all) |
| | 774 | |
| | 775 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS |
| | 776 | # May be overridden by arch/$(ARCH)/Makefile |
| | 777 | quiet_cmd_vmlinux__ ?= LD $@ |
| | 778 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ |
| | 779 | -T $(vmlinux-lds) $(vmlinux-init) \ |
| | 780 | --start-group $(vmlinux-main) --end-group \ |
| | 781 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) |
| | 782 | |
| | 783 | # Generate new vmlinux version |
| | 784 | quiet_cmd_vmlinux_version = GEN .version |
| | 785 | cmd_vmlinux_version = set -e; \ |
| | 786 | if [ ! -r .version ]; then \ |
| | 787 | rm -f .version; \ |
| | 788 | echo 1 >.version; \ |
| | 789 | else \ |
| | 790 | mv .version .old_version; \ |
| | 791 | expr 0$$(cat .old_version) + 1 >.version; \ |
| | 792 | fi; \ |
| | 793 | $(MAKE) $(build)=init |
| | 794 | |
| | 795 | # Generate System.map |
| | 796 | quiet_cmd_sysmap = SYSMAP |
| | 797 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
| | 798 | |
| | 799 | # Sort exception table at build time |
| | 800 | quiet_cmd_sortextable = SORTEX |
| | 801 | cmd_sortextable = $(objtree)/scripts/sortextable |
| | 802 | |
| | 803 | # Link of vmlinux |
| | 804 | # If CONFIG_KALLSYMS is set .version is already updated |
| | 805 | # Generate System.map and verify that the content is consistent |
| | 806 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
| | 807 | # First command is ':' to allow us to use + in front of the rule |
| | 808 | define rule_vmlinux__ |
| | 809 | : |
| | 810 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
| | 811 | |
| | 812 | $(call cmd,vmlinux__) |
| | 813 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd |
| | 814 | |
| | 815 | $(if $(CONFIG_BUILDTIME_EXTABLE_SORT), \ |
| | 816 | $(Q)$(if $($(quiet)cmd_sortextable), \ |
| | 817 | echo ' $($(quiet)cmd_sortextable) vmlinux' &&) \ |
| | 818 | $(cmd_sortextable) vmlinux) |
| | 819 | |
| | 820 | |
| | 821 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
| | 822 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ |
| | 823 | $(cmd_sysmap) $@ System.map; \ |
| | 824 | if [ $$? -ne 0 ]; then \ |
| | 825 | rm -f $@; \ |
| | 826 | /bin/false; \ |
| | 827 | fi; |
| | 828 | $(verify_kallsyms) |
| | 829 | endef |
| | 830 | |
| | 831 | |
| | 832 | ifdef CONFIG_KALLSYMS |
| | 833 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) |
| | 834 | # It's a three stage process: |
| | 835 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is |
| | 836 | # empty |
| | 837 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
| | 838 | # the right size - vmlinux version (uname -v) is updated during this step |
| | 839 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, |
| | 840 | # but due to the added section, some addresses have shifted. |
| | 841 | # From here, we generate a correct .tmp_kallsyms2.o |
| | 842 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. |
| | 843 | # o Verify that the System.map from vmlinux matches the map from |
| | 844 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. |
| | 845 | # o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using |
| | 846 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a |
| | 847 | # temporary bypass to allow the kernel to be built while the |
| | 848 | # maintainers work out what went wrong with kallsyms. |
| | 849 | |
| | 850 | last_kallsyms := 2 |
| | 851 | |
| | 852 | ifdef KALLSYMS_EXTRA_PASS |
| | 853 | ifneq ($(KALLSYMS_EXTRA_PASS),0) |
| | 854 | last_kallsyms := 3 |
| | 855 | endif |
| | 856 | endif |
| | 857 | |
| | 858 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
| | 859 | |
| | 860 | define verify_kallsyms |
| | 861 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
| | 862 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
| | 863 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map |
| | 864 | $(Q)cmp -s System.map .tmp_System.map || \ |
| | 865 | (echo Inconsistent kallsyms data; \ |
| | 866 | echo This is a bug - please report about it; \ |
| | 867 | echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \ |
| | 868 | rm .tmp_kallsyms* ; /bin/false ) |
| | 869 | endef |
| | 870 | |
| | 871 | # Update vmlinux version before link |
| | 872 | # Use + in front of this rule to silent warning about make -j1 |
| | 873 | # First command is ':' to allow us to use + in front of this rule |
| | 874 | cmd_ksym_ld = $(cmd_vmlinux__) |
| | 875 | define rule_ksym_ld |
| | 876 | : |
| | 877 | +$(call cmd,vmlinux_version) |
| | 878 | $(call cmd,vmlinux__) |
| | 879 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd |
| | 880 | endef |
| | 881 | |
| | 882 | # Generate .S file with all kernel symbols |
| | 883 | quiet_cmd_kallsyms = KSYM $@ |
| | 884 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
| | 885 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
| | 886 | |
| | 887 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
| | 888 | $(call if_changed_dep,as_o_S) |
| | 889 | |
| | 890 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) |
| | 891 | $(call cmd,kallsyms) |
| | 892 | |
| | 893 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version |
| | 894 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE |
| | 895 | $(call if_changed_rule,ksym_ld) |
| | 896 | |
| | 897 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE |
| | 898 | $(call if_changed,vmlinux__) |
| | 899 | |
| | 900 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE |
| | 901 | $(call if_changed,vmlinux__) |
| | 902 | |
| | 903 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
| | 904 | $(KALLSYMS): scripts ; |
| | 905 | |
| | 906 | # Generate some data for debugging strange kallsyms problems |
| | 907 | debug_kallsyms: .tmp_map$(last_kallsyms) |
| | 908 | |
| | 909 | .tmp_map%: .tmp_vmlinux% FORCE |
| | 910 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
| | 911 | |
| | 912 | .tmp_map3: .tmp_map2 |
| | 913 | |
| | 914 | .tmp_map2: .tmp_map1 |
| | 915 | |
| | 916 | endif # ifdef CONFIG_KALLSYMS |
| | 917 | |
| | 918 | # Do modpost on a prelinked vmlinux. The finally linked vmlinux has |
| | 919 | # relevant sections renamed as per the linker script. |
| | 920 | quiet_cmd_vmlinux-modpost = LD $@ |
| | 921 | cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ |
| | 922 | $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ |
| | 923 | $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) |
| | 924 | define rule_vmlinux-modpost |
| | 925 | : |
| | 926 | +$(call cmd,vmlinux-modpost) |
| | 927 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ |
| | 928 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd |
| | 929 | endef |
| | 930 | |
| | 931 | # vmlinux image - including updated kernel symbols |
| | 932 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE |
| | 933 | ifdef CONFIG_HEADERS_CHECK |
| | 934 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
| | 935 | endif |
| | 936 | ifdef CONFIG_SAMPLES |
| | 937 | $(Q)$(MAKE) $(build)=samples |
| | 938 | endif |
| | 939 | ifdef CONFIG_BUILD_DOCSRC |
| | 940 | $(Q)$(MAKE) $(build)=Documentation |
| | 941 | endif |
| | 942 | $(call vmlinux-modpost) |
| | 943 | $(call if_changed_rule,vmlinux__) |
| | 944 | $(Q)rm -f .old_version |
| | 945 | |
| | 946 | # build vmlinux.o first to catch section mismatch errors early |
| | 947 | ifdef CONFIG_KALLSYMS |
| | 948 | .tmp_vmlinux1: vmlinux.o |
| | 949 | endif |
| | 950 | |
| | 951 | modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) |
| | 952 | vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE |
| | 953 | $(call if_changed_rule,vmlinux-modpost) |
| | 954 | |
| | 955 | # The actual objects are generated when descending, |
| | 956 | # make sure no implicit rule kicks in |
| | 957 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; |
| | 958 | |
| | 959 | # Handle descending into subdirectories listed in $(vmlinux-dirs) |
| | 960 | # Preset locale variables to speed up the build process. Limit locale |
| | 961 | # tweaks to this spot to avoid wrong language settings when running |
| | 962 | # make menuconfig etc. |
| | 963 | # Error messages still appears in the original language |
| | 964 | |
| | 965 | PHONY += $(vmlinux-dirs) |
| | 966 | $(vmlinux-dirs): prepare scripts |
| | 967 | $(Q)$(MAKE) $(build)=$@ |
| | 968 | |
| | 969 | # Store (new) KERNELRELASE string in include/config/kernel.release |
| | 970 | include/config/kernel.release: include/config/auto.conf FORCE |
| | 971 | $(Q)rm -f $@ |
| | 972 | $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ |
| | 973 | |
| | 974 | |
| | 975 | # Things we need to do before we recursively start building the kernel |
| | 976 | # or the modules are listed in "prepare". |
| | 977 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| | 978 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| | 979 | # version.h and scripts_basic is processed / created. |
| | 980 | |
| | 981 | # Listed in dependency order |
| | 982 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
| | 983 | |
| | 984 | # prepare3 is used to check if we are building in a separate output directory, |
| | 985 | # and if so do: |
| | 986 | # 1) Check that make has not been executed in the kernel src $(srctree) |
| | 987 | prepare3: include/config/kernel.release |
| | 988 | ifneq ($(KBUILD_SRC),) |
| | 989 | @$(kecho) ' Using $(srctree) as source for kernel' |
| | 990 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
| | 991 | echo " $(srctree) is not clean, please run 'make mrproper'"; \ |
| | 992 | echo " in the '$(srctree)' directory.";\ |
| | 993 | /bin/false; \ |
| | 994 | fi; |
| | 995 | endif |
| | 996 | |
| | 997 | # prepare2 creates a makefile if using a separate output directory |
| | 998 | prepare2: prepare3 outputmakefile asm-generic |
| | 999 | |
| | 1000 | prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ |
| | 1001 | include/config/auto.conf |
| | 1002 | $(cmd_crmodverdir) |
| | 1003 | |
| | 1004 | archprepare: archheaders archscripts prepare1 scripts_basic |
| | 1005 | |
| | 1006 | prepare0: archprepare FORCE |
| | 1007 | $(Q)$(MAKE) $(build)=. |
| | 1008 | |
| | 1009 | # All the preparing.. |
| | 1010 | prepare: prepare0 |
| | 1011 | |
| | 1012 | # Generate some files |
| | 1013 | # --------------------------------------------------------------------------- |
| | 1014 | |
| | 1015 | # KERNELRELEASE can change from a few different places, meaning version.h |
| | 1016 | # needs to be updated, so this check is forced on all builds |
| | 1017 | |
| | 1018 | uts_len := 64 |
| | 1019 | define filechk_utsrelease.h |
| | 1020 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| | 1021 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| | 1022 | exit 1; \ |
| | 1023 | fi; \ |
| | 1024 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) |
| | 1025 | endef |
| | 1026 | |
| | 1027 | define filechk_version.h |
| | 1028 | (echo \#define LINUX_VERSION_CODE $(shell \ |
| | 1029 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
| | 1030 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
| | 1031 | endef |
| | 1032 | |
| | 1033 | include/linux/version.h: $(srctree)/Makefile FORCE |
| | 1034 | $(call filechk,version.h) |
| | 1035 | |
| | 1036 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
| | 1037 | $(call filechk,utsrelease.h) |
| | 1038 | |
| | 1039 | PHONY += headerdep |
| | 1040 | headerdep: |
| | 1041 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
| | 1042 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| | 1043 | |
| | 1044 | # --------------------------------------------------------------------------- |
| | 1045 | |
| | 1046 | PHONY += depend dep |
| | 1047 | depend dep: |
| | 1048 | @echo '*** Warning: make $@ is unnecessary now.' |
| | 1049 | |
| | 1050 | # --------------------------------------------------------------------------- |
| | 1051 | # Firmware install |
| | 1052 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware |
| | 1053 | export INSTALL_FW_PATH |
| | 1054 | |
| | 1055 | PHONY += firmware_install |
| | 1056 | firmware_install: FORCE |
| | 1057 | @mkdir -p $(objtree)/firmware |
| | 1058 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install |
| | 1059 | |
| | 1060 | # --------------------------------------------------------------------------- |
| | 1061 | # Kernel headers |
| | 1062 | |
| | 1063 | #Default location for installed headers |
| | 1064 | export INSTALL_HDR_PATH = $(objtree)/usr |
| | 1065 | |
| | 1066 | hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj |
| | 1067 | |
| | 1068 | # If we do an all arch process set dst to asm-$(hdr-arch) |
| | 1069 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) |
| | 1070 | |
| | 1071 | PHONY += archheaders |
| | 1072 | archheaders: |
| | 1073 | |
| | 1074 | PHONY += archscripts |
| | 1075 | archscripts: |
| | 1076 | |
| | 1077 | PHONY += __headers |
| | 1078 | __headers: include/linux/version.h scripts_basic asm-generic archheaders archscripts FORCE |
| | 1079 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
| | 1080 | |
| | 1081 | PHONY += headers_install_all |
| | 1082 | headers_install_all: |
| | 1083 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install |
| | 1084 | |
| | 1085 | PHONY += headers_install |
| | 1086 | headers_install: __headers |
| | 1087 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ |
| | 1088 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
| | 1089 | $(Q)$(MAKE) $(hdr-inst)=include |
| | 1090 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) |
| | 1091 | |
| | 1092 | PHONY += headers_check_all |
| | 1093 | headers_check_all: headers_install_all |
| | 1094 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
| | 1095 | |
| | 1096 | PHONY += headers_check |
| | 1097 | headers_check: headers_install |
| | 1098 | $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 |
| | 1099 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 |
| | 1100 | |
| | 1101 | # --------------------------------------------------------------------------- |
| | 1102 | # Modules |
| | 1103 | |
| | 1104 | ifdef CONFIG_MODULES |
| | 1105 | |
| | 1106 | # By default, build modules as well |
| | 1107 | |
| | 1108 | all: modules |
| | 1109 | |
| | 1110 | # Build modules |
| | 1111 | # |
| | 1112 | # A module can be listed more than once in obj-m resulting in |
| | 1113 | # duplicate lines in modules.order files. Those are removed |
| | 1114 | # using awk while concatenating to the final file. |
| | 1115 | |
| | 1116 | PHONY += modules |
| | 1117 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
| | 1118 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
| | 1119 | @$(kecho) ' Building modules, stage 2.'; |
| | 1120 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1121 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild |
| | 1122 | |
| | 1123 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
| | 1124 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin |
| | 1125 | |
| | 1126 | %/modules.builtin: include/config/auto.conf |
| | 1127 | $(Q)$(MAKE) $(modbuiltin)=$* |
| | 1128 | |
| | 1129 | |
| | 1130 | # Target to prepare building external modules |
| | 1131 | PHONY += modules_prepare |
| | 1132 | modules_prepare: prepare scripts |
| | 1133 | |
| | 1134 | # Target to install modules |
| | 1135 | PHONY += modules_install |
| | 1136 | modules_install: _modinst_ _modinst_post |
| | 1137 | |
| | 1138 | PHONY += _modinst_ |
| | 1139 | _modinst_: |
| | 1140 | @rm -rf $(MODLIB)/kernel |
| | 1141 | @rm -f $(MODLIB)/source |
| | 1142 | @mkdir -p $(MODLIB)/kernel |
| | 1143 | @ln -s $(srctree) $(MODLIB)/source |
| | 1144 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| | 1145 | rm -f $(MODLIB)/build ; \ |
| | 1146 | ln -s $(objtree) $(MODLIB)/build ; \ |
| | 1147 | fi |
| | 1148 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
| | 1149 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
| | 1150 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| | 1151 | |
| | 1152 | # This depmod is only for convenience to give the initial |
| | 1153 | # boot a modules.dep even before / is mounted read-write. However the |
| | 1154 | # boot script depmod is the master version. |
| | 1155 | PHONY += _modinst_post |
| | 1156 | _modinst_post: _modinst_ |
| | 1157 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst |
| | 1158 | $(call cmd,depmod) |
| | 1159 | |
| | 1160 | else # CONFIG_MODULES |
| | 1161 | |
| | 1162 | # Modules not configured |
| | 1163 | # --------------------------------------------------------------------------- |
| | 1164 | |
| | 1165 | modules modules_install: FORCE |
| | 1166 | @echo |
| | 1167 | @echo "The present kernel configuration has modules disabled." |
| | 1168 | @echo "Type 'make config' and enable loadable module support." |
| | 1169 | @echo "Then build a kernel with module support enabled." |
| | 1170 | @echo |
| | 1171 | @exit 1 |
| | 1172 | |
| | 1173 | endif # CONFIG_MODULES |
| | 1174 | |
| | 1175 | ### |
| | 1176 | # Cleaning is done on three levels. |
| | 1177 | # make clean Delete most generated files |
| | 1178 | # Leave enough to build external modules |
| | 1179 | # make mrproper Delete the current configuration, and all generated files |
| | 1180 | # make distclean Remove editor backup files, patch leftover files and the like |
| | 1181 | |
| | 1182 | # Directories & files removed with 'make clean' |
| | 1183 | CLEAN_DIRS += $(MODVERDIR) |
| | 1184 | CLEAN_FILES += vmlinux System.map \ |
| | 1185 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map |
| | 1186 | |
| | 1187 | # Directories & files removed with 'make mrproper' |
| | 1188 | MRPROPER_DIRS += include/config usr/include include/generated \ |
| | 1189 | arch/*/include/generated |
| | 1190 | MRPROPER_FILES += .config .config.old .version .old_version \ |
| | 1191 | include/linux/version.h \ |
| | 1192 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS |
| | 1193 | |
| | 1194 | # clean - Delete most, but leave enough to build external modules |
| | 1195 | # |
| | 1196 | clean: rm-dirs := $(CLEAN_DIRS) |
| | 1197 | clean: rm-files := $(CLEAN_FILES) |
| | 1198 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
| | 1199 | |
| | 1200 | PHONY += $(clean-dirs) clean archclean |
| | 1201 | $(clean-dirs): |
| | 1202 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| | 1203 | |
| | 1204 | clean: archclean |
| | 1205 | |
| | 1206 | # mrproper - Delete all generated files, including .config |
| | 1207 | # |
| | 1208 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| | 1209 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| | 1210 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) |
| | 1211 | |
| | 1212 | PHONY += $(mrproper-dirs) mrproper archmrproper |
| | 1213 | $(mrproper-dirs): |
| | 1214 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| | 1215 | |
| | 1216 | mrproper: clean archmrproper $(mrproper-dirs) |
| | 1217 | $(call cmd,rmdirs) |
| | 1218 | $(call cmd,rmfiles) |
| | 1219 | |
| | 1220 | # distclean |
| | 1221 | # |
| | 1222 | PHONY += distclean |
| | 1223 | |
| | 1224 | distclean: mrproper |
| | 1225 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
| | 1226 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| | 1227 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
| | 1228 | -o -name '.*.rej' \ |
| | 1229 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
| | 1230 | -type f -print | xargs rm -f |
| | 1231 | |
| | 1232 | |
| | 1233 | # Packaging of the kernel to various formats |
| | 1234 | # --------------------------------------------------------------------------- |
| | 1235 | # rpm target kept for backward compatibility |
| | 1236 | package-dir := $(srctree)/scripts/package |
| | 1237 | |
| | 1238 | %src-pkg: FORCE |
| | 1239 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1240 | %pkg: include/config/kernel.release FORCE |
| | 1241 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1242 | rpm: include/config/kernel.release FORCE |
| | 1243 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| | 1244 | |
| | 1245 | |
| | 1246 | # Brief documentation of the typical targets used |
| | 1247 | # --------------------------------------------------------------------------- |
| | 1248 | |
| | 1249 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| | 1250 | boards := $(notdir $(boards)) |
| | 1251 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| | 1252 | board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| | 1253 | |
| | 1254 | help: |
| | 1255 | @echo 'Cleaning targets:' |
| | 1256 | @echo ' clean - Remove most generated files but keep the config and' |
| | 1257 | @echo ' enough build support to build external modules' |
| | 1258 | @echo ' mrproper - Remove all generated files + config + various backup files' |
| | 1259 | @echo ' distclean - mrproper + remove editor backup and patch files' |
| | 1260 | @echo '' |
| | 1261 | @echo 'Configuration targets:' |
| | 1262 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| | 1263 | @echo '' |
| | 1264 | @echo 'Other generic targets:' |
| | 1265 | @echo ' all - Build all targets marked with [*]' |
| | 1266 | @echo '* vmlinux - Build the bare kernel' |
| | 1267 | @echo '* modules - Build all modules' |
| | 1268 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| | 1269 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' |
| | 1270 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' |
| | 1271 | @echo ' dir/ - Build all files in dir and below' |
| | 1272 | @echo ' dir/file.[oisS] - Build specified target only' |
| | 1273 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| | 1274 | @echo ' (requires a recent binutils and recent build (System.map))' |
| | 1275 | @echo ' dir/file.ko - Build module including final link' |
| | 1276 | @echo ' modules_prepare - Set up for building external modules' |
| | 1277 | @echo ' tags/TAGS - Generate tags file for editors' |
| | 1278 | @echo ' cscope - Generate cscope index' |
| | 1279 | @echo ' gtags - Generate GNU GLOBAL index' |
| | 1280 | @echo ' kernelrelease - Output the release version string' |
| | 1281 | @echo ' kernelversion - Output the version stored in Makefile' |
| | 1282 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| | 1283 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| | 1284 | echo '' |
| | 1285 | @echo 'Static analysers' |
| | 1286 | @echo ' checkstack - Generate a list of stack hogs' |
| | 1287 | @echo ' namespacecheck - Name space analysis on compiled kernel' |
| | 1288 | @echo ' versioncheck - Sanity check on version.h usage' |
| | 1289 | @echo ' includecheck - Check for duplicate included header files' |
| | 1290 | @echo ' export_report - List the usages of all exported symbols' |
| | 1291 | @echo ' headers_check - Sanity check on exported headers' |
| | 1292 | @echo ' headerdep - Detect inclusion cycles in headers' |
| | 1293 | @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help |
| | 1294 | @echo '' |
| | 1295 | @echo 'Kernel packaging:' |
| | 1296 | @$(MAKE) $(build)=$(package-dir) help |
| | 1297 | @echo '' |
| | 1298 | @echo 'Documentation targets:' |
| | 1299 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp |
| | 1300 | @echo '' |
| | 1301 | @echo 'Architecture specific targets ($(SRCARCH)):' |
| | 1302 | @$(if $(archhelp),$(archhelp),\ |
| | 1303 | echo ' No architecture specific help defined for $(SRCARCH)') |
| | 1304 | @echo '' |
| | 1305 | @$(if $(boards), \ |
| | 1306 | $(foreach b, $(boards), \ |
| | 1307 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| | 1308 | echo '') |
| | 1309 | @$(if $(board-dirs), \ |
| | 1310 | $(foreach b, $(board-dirs), \ |
| | 1311 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| | 1312 | printf " %-16s - Show all of the above\\n" help-boards; \ |
| | 1313 | echo '') |
| | 1314 | |
| | 1315 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| | 1316 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| | 1317 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| | 1318 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
| | 1319 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| | 1320 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
| | 1321 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
| | 1322 | @echo ' 1: warnings which may be relevant and do not occur too often' |
| | 1323 | @echo ' 2: warnings which occur quite often but may still be relevant' |
| | 1324 | @echo ' 3: more obscure warnings, can most likely be ignored' |
| | 1325 | @echo ' Multiple levels can be combined with W=12 or W=123' |
| | 1326 | @echo '' |
| | 1327 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| | 1328 | @echo 'For further info see the ./README file' |
| | 1329 | |
| | 1330 | |
| | 1331 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
| | 1332 | |
| | 1333 | help-boards: $(help-board-dirs) |
| | 1334 | |
| | 1335 | boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) |
| | 1336 | |
| | 1337 | $(help-board-dirs): help-%: |
| | 1338 | @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| | 1339 | @$(if $(boards-per-dir), \ |
| | 1340 | $(foreach b, $(boards-per-dir), \ |
| | 1341 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| | 1342 | echo '') |
| | 1343 | |
| | 1344 | |
| | 1345 | # Documentation targets |
| | 1346 | # --------------------------------------------------------------------------- |
| | 1347 | %docs: scripts_basic FORCE |
| | 1348 | $(Q)$(MAKE) $(build)=scripts build_docproc |
| | 1349 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
| | 1350 | |
| | 1351 | else # KBUILD_EXTMOD |
| | 1352 | |
| | 1353 | ### |
| | 1354 | # External module support. |
| | 1355 | # When building external modules the kernel used as basis is considered |
| | 1356 | # read-only, and no consistency checks are made and the make |
| | 1357 | # system is not used on the basis kernel. If updates are required |
| | 1358 | # in the basis kernel ordinary make commands (without M=...) must |
| | 1359 | # be used. |
| | 1360 | # |
| | 1361 | # The following are the only valid targets when building external |
| | 1362 | # modules. |
| | 1363 | # make M=dir clean Delete all automatically generated files |
| | 1364 | # make M=dir modules Make all modules in specified dir |
| | 1365 | # make M=dir Same as 'make M=dir modules' |
| | 1366 | # make M=dir modules_install |
| | 1367 | # Install the modules built in the module directory |
| | 1368 | # Assumes install directory is already created |
| | 1369 | |
| | 1370 | # We are always building modules |
| | 1371 | KBUILD_MODULES := 1 |
| | 1372 | PHONY += crmodverdir |
| | 1373 | crmodverdir: |
| | 1374 | $(cmd_crmodverdir) |
| | 1375 | |
| | 1376 | PHONY += $(objtree)/Module.symvers |
| | 1377 | $(objtree)/Module.symvers: |
| | 1378 | @test -e $(objtree)/Module.symvers || ( \ |
| | 1379 | echo; \ |
| | 1380 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
| | 1381 | echo " is missing; modules will have no dependencies and modversions."; \ |
| | 1382 | echo ) |
| | 1383 | |
| | 1384 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
| | 1385 | PHONY += $(module-dirs) modules |
| | 1386 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
| | 1387 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
| | 1388 | |
| | 1389 | modules: $(module-dirs) |
| | 1390 | @$(kecho) ' Building modules, stage 2.'; |
| | 1391 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1392 | |
| | 1393 | PHONY += modules_install |
| | 1394 | modules_install: _emodinst_ _emodinst_post |
| | 1395 | |
| | 1396 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
| | 1397 | PHONY += _emodinst_ |
| | 1398 | _emodinst_: |
| | 1399 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
| | 1400 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| | 1401 | |
| | 1402 | PHONY += _emodinst_post |
| | 1403 | _emodinst_post: _emodinst_ |
| | 1404 | $(call cmd,depmod) |
| | 1405 | |
| | 1406 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
| | 1407 | |
| | 1408 | PHONY += $(clean-dirs) clean |
| | 1409 | $(clean-dirs): |
| | 1410 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| | 1411 | |
| | 1412 | clean: rm-dirs := $(MODVERDIR) |
| | 1413 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
| | 1414 | |
| | 1415 | help: |
| | 1416 | @echo ' Building external modules.' |
| | 1417 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| | 1418 | @echo '' |
| | 1419 | @echo ' modules - default target, build the module(s)' |
| | 1420 | @echo ' modules_install - install the module' |
| | 1421 | @echo ' clean - remove generated files in module directory only' |
| | 1422 | @echo '' |
| | 1423 | |
| | 1424 | # Dummies... |
| | 1425 | PHONY += prepare scripts |
| | 1426 | prepare: ; |
| | 1427 | scripts: ; |
| | 1428 | endif # KBUILD_EXTMOD |
| | 1429 | |
| | 1430 | clean: $(clean-dirs) |
| | 1431 | $(call cmd,rmdirs) |
| | 1432 | $(call cmd,rmfiles) |
| | 1433 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| | 1434 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
| | 1435 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| | 1436 | -o -name '*.symtypes' -o -name 'modules.order' \ |
| | 1437 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ |
| | 1438 | -o -name '*.gcno' \) -type f -print | xargs rm -f |
| | 1439 | |
| | 1440 | # Generate tags for editors |
| | 1441 | # --------------------------------------------------------------------------- |
| | 1442 | quiet_cmd_tags = GEN $@ |
| | 1443 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ |
| | 1444 | |
| | 1445 | tags TAGS cscope gtags: FORCE |
| | 1446 | $(call cmd,tags) |
| | 1447 | |
| | 1448 | # Scripts to check various things for consistency |
| | 1449 | # --------------------------------------------------------------------------- |
| | 1450 | |
| | 1451 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
| | 1452 | |
| | 1453 | includecheck: |
| | 1454 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| | 1455 | -name '*.[hcS]' -type f -print | sort \ |
| | 1456 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
| | 1457 | |
| | 1458 | versioncheck: |
| | 1459 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| | 1460 | -name '*.[hcS]' -type f -print | sort \ |
| | 1461 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
| | 1462 | |
| | 1463 | coccicheck: |
| | 1464 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ |
| | 1465 | |
| | 1466 | namespacecheck: |
| | 1467 | $(PERL) $(srctree)/scripts/namespace.pl |
| | 1468 | |
| | 1469 | export_report: |
| | 1470 | $(PERL) $(srctree)/scripts/export_report.pl |
| | 1471 | |
| | 1472 | endif #ifeq ($(config-targets),1) |
| | 1473 | endif #ifeq ($(mixed-targets),1) |
| | 1474 | |
| | 1475 | PHONY += checkstack kernelrelease kernelversion |
| | 1476 | |
| | 1477 | # UML needs a little special treatment here. It wants to use the host |
| | 1478 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| | 1479 | # else wants $(ARCH), including people doing cross-builds, which means |
| | 1480 | # that $(SUBARCH) doesn't work here. |
| | 1481 | ifeq ($(ARCH), um) |
| | 1482 | CHECKSTACK_ARCH := $(SUBARCH) |
| | 1483 | else |
| | 1484 | CHECKSTACK_ARCH := $(ARCH) |
| | 1485 | endif |
| | 1486 | checkstack: |
| | 1487 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| | 1488 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| | 1489 | |
| | 1490 | kernelrelease: |
| | 1491 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| | 1492 | |
| | 1493 | kernelversion: |
| | 1494 | @echo $(KERNELVERSION) |
| | 1495 | |
| | 1496 | # Clear a bunch of variables before executing the submake |
| | 1497 | tools/: FORCE |
| | 1498 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ |
| | 1499 | |
| | 1500 | tools/%: FORCE |
| | 1501 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $* |
| | 1502 | |
| | 1503 | # Single targets |
| | 1504 | # --------------------------------------------------------------------------- |
| | 1505 | # Single targets are compatible with: |
| | 1506 | # - build with mixed source and output |
| | 1507 | # - build with separate output dir 'make O=...' |
| | 1508 | # - external modules |
| | 1509 | # |
| | 1510 | # target-dir => where to store outputfile |
| | 1511 | # build-dir => directory in kernel source tree to use |
| | 1512 | |
| | 1513 | ifeq ($(KBUILD_EXTMOD),) |
| | 1514 | build-dir = $(patsubst %/,%,$(dir $@)) |
| | 1515 | target-dir = $(dir $@) |
| | 1516 | else |
| | 1517 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
| | 1518 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
| | 1519 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
| | 1520 | endif |
| | 1521 | |
| | 1522 | %.s: %.c prepare scripts FORCE |
| | 1523 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1524 | %.i: %.c prepare scripts FORCE |
| | 1525 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1526 | %.o: %.c prepare scripts FORCE |
| | 1527 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1528 | %.lst: %.c prepare scripts FORCE |
| | 1529 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1530 | %.s: %.S prepare scripts FORCE |
| | 1531 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1532 | %.o: %.S prepare scripts FORCE |
| | 1533 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1534 | %.symtypes: %.c prepare scripts FORCE |
| | 1535 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| | 1536 | |
| | 1537 | # Modules |
| | 1538 | /: prepare scripts FORCE |
| | 1539 | $(cmd_crmodverdir) |
| | 1540 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| | 1541 | $(build)=$(build-dir) |
| | 1542 | %/: prepare scripts FORCE |
| | 1543 | $(cmd_crmodverdir) |
| | 1544 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| | 1545 | $(build)=$(build-dir) |
| | 1546 | %.ko: prepare scripts FORCE |
| | 1547 | $(cmd_crmodverdir) |
| | 1548 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| | 1549 | $(build)=$(build-dir) $(@:.ko=.o) |
| | 1550 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| | 1551 | |
| | 1552 | # FIXME Should go into a make.lib or something |
| | 1553 | # =========================================================================== |
| | 1554 | |
| | 1555 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| | 1556 | cmd_rmdirs = rm -rf $(rm-dirs) |
| | 1557 | |
| | 1558 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| | 1559 | cmd_rmfiles = rm -f $(rm-files) |
| | 1560 | |
| | 1561 | # Run depmod only if we have System.map and depmod is executable |
| | 1562 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| | 1563 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| | 1564 | $(KERNELRELEASE) |
| | 1565 | |
| | 1566 | # Create temporary dir for module support files |
| | 1567 | # clean it up only when building all modules |
| | 1568 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ |
| | 1569 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) |
| | 1570 | |
| | 1571 | a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ |
| | 1572 | $(KBUILD_AFLAGS_KERNEL) \ |
| | 1573 | $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ |
| | 1574 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) |
| | 1575 | |
| | 1576 | quiet_cmd_as_o_S = AS $@ |
| | 1577 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| | 1578 | |
| | 1579 | # read all saved command lines |
| | 1580 | |
| | 1581 | targets := $(wildcard $(sort $(targets))) |
| | 1582 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| | 1583 | |
| | 1584 | ifneq ($(cmd_files),) |
| | 1585 | $(cmd_files): ; # Do not try to update included dependency files |
| | 1586 | include $(cmd_files) |
| | 1587 | endif |
| | 1588 | |
| | 1589 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
| | 1590 | # Usage: |
| | 1591 | # $(Q)$(MAKE) $(clean)=dir |
| | 1592 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
| | 1593 | |
| | 1594 | endif # skip-makefile |
| | 1595 | |
| | 1596 | PHONY += FORCE |
| | 1597 | FORCE: |
| | 1598 | |
| | 1599 | # Declare the contents of the .PHONY variable as phony. We keep that |
| | 1600 | # information in a variable so we can use it in if_changed and friends. |
| | 1601 | .PHONY: $(PHONY) |
projects / deliverable / linux.git / blame_incremental