1 VERSION = 3 2 PATCHLEVEL = 1 3 SUBLEVEL = 0 4 EXTRAVERSION = -rc6 5 NAME = "Divemaster Edition" 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 ($(findstring s,$(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 := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 404 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 405 406 # =========================================================================== 407 # Rules shared between *config targets and build targets 408 409 # Basic helpers built in scripts/ 410 PHONY += scripts_basic 411 scripts_basic: 412 $(Q)$(MAKE) $(build)=scripts/basic 413 $(Q)rm -f .tmp_quiet_recordmcount 414 415 # To avoid any implicit rule to kick in, define an empty command. 416 scripts/basic/%: scripts_basic ; 417 418 PHONY += outputmakefile 419 # outputmakefile generates a Makefile in the output directory, if using a 420 # separate output directory. This allows convenient use of make in the 421 # output directory. 422 outputmakefile: 423 ifneq ($(KBUILD_SRC),) 424 $(Q)ln -fsn $(srctree) source 425 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 426 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 427 endif 428 429 # Support for using generic headers in asm-generic 430 PHONY += asm-generic 431 asm-generic: 432 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 433 obj=arch/$(SRCARCH)/include/generated/asm 434 435 # To make sure we do not include .config for any of the *config targets 436 # catch them early, and hand them over to scripts/kconfig/Makefile 437 # It is allowed to specify more targets when calling make, including 438 # mixing *config targets and build targets. 439 # For example 'make oldconfig all'. 440 # Detect when mixed targets is specified, and make a second invocation 441 # of make so .config is not included in this case either (for *config). 442 443 no-dot-config-targets := clean mrproper distclean \ 444 cscope gtags TAGS tags help %docs check% coccicheck \ 445 include/linux/version.h headers_% \ 446 kernelversion %src-pkg 447 448 config-targets := 0 449 mixed-targets := 0 450 dot-config := 1 451 452 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 453 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 454 dot-config := 0 455 endif 456 endif 457 458 ifeq ($(KBUILD_EXTMOD),) 459 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 460 config-targets := 1 461 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 462 mixed-targets := 1 463 endif 464 endif 465 endif 466 467 ifeq ($(mixed-targets),1) 468 # =========================================================================== 469 # We're called with mixed targets (*config and build targets). 470 # Handle them one by one. 471 472 %:: FORCE 473 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 474 475 else 476 ifeq ($(config-targets),1) 477 # =========================================================================== 478 # *config targets only - make sure prerequisites are updated, and descend 479 # in scripts/kconfig to make the *config target 480 481 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 482 # KBUILD_DEFCONFIG may point out an alternative default configuration 483 # used for 'make defconfig' 484 include $(srctree)/arch/$(SRCARCH)/Makefile 485 export KBUILD_DEFCONFIG KBUILD_KCONFIG 486 487 config: scripts_basic outputmakefile FORCE 488 $(Q)mkdir -p include/linux include/config 489 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 490 491 %config: scripts_basic outputmakefile FORCE 492 $(Q)mkdir -p include/linux include/config 493 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 494 495 else 496 # =========================================================================== 497 # Build targets only - this includes vmlinux, arch specific targets, clean 498 # targets and others. In general all targets except *config targets. 499 500 ifeq ($(KBUILD_EXTMOD),) 501 # Additional helpers built in scripts/ 502 # Carefully list dependencies so we do not try to build scripts twice 503 # in parallel 504 PHONY += scripts 505 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 506 $(Q)$(MAKE) $(build)=$(@) 507 508 # Objects we will link into vmlinux / subdirs we need to visit 509 init-y := init/ 510 drivers-y := drivers/ sound/ firmware/ 511 net-y := net/ 512 libs-y := lib/ 513 core-y := usr/ 514 endif # KBUILD_EXTMOD 515 516 ifeq ($(dot-config),1) 517 # Read in config 518 -include include/config/auto.conf 519 520 ifeq ($(KBUILD_EXTMOD),) 521 # Read in dependencies to all Kconfig* files, make sure to run 522 # oldconfig if changes are detected. 523 -include include/config/auto.conf.cmd 524 525 # To avoid any implicit rule to kick in, define an empty command 526 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 527 528 # If .config is newer than include/config/auto.conf, someone tinkered 529 # with it and forgot to run make oldconfig. 530 # if auto.conf.cmd is missing then we are probably in a cleaned tree so 531 # we execute the config step to be sure to catch updated Kconfig files 532 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 533 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 534 else 535 # external modules needs include/generated/autoconf.h and include/config/auto.conf 536 # but do not care if they are up-to-date. Use auto.conf to trigger the test 537 PHONY += include/config/auto.conf 538 539 include/config/auto.conf: 540 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 541 echo; \ 542 echo " ERROR: Kernel configuration is invalid."; \ 543 echo " include/generated/autoconf.h or $@ are missing.";\ 544 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 545 echo; \ 546 /bin/false) 547 548 endif # KBUILD_EXTMOD 549 550 else 551 # Dummy target needed, because used as prerequisite 552 include/config/auto.conf: ; 553 endif # $(dot-config) 554 555 # The all: target is the default when no target is given on the 556 # command line. 557 # This allow a user to issue only 'make' to build a kernel including modules 558 # Defaults to vmlinux, but the arch makefile usually adds further targets 559 all: vmlinux 560 561 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 562 KBUILD_CFLAGS += -Os 563 else 564 KBUILD_CFLAGS += -O2 565 endif 566 567 include $(srctree)/arch/$(SRCARCH)/Makefile 568 569 ifneq ($(CONFIG_FRAME_WARN),0) 570 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 571 endif 572 573 # Force gcc to behave correct even for buggy distributions 574 ifndef CONFIG_CC_STACKPROTECTOR 575 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 576 endif 577 578 # This warning generated too much noise in a regular build. 579 # Use make W=1 to enable this warning (see scripts/Makefile.build) 580 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 581 582 ifdef CONFIG_FRAME_POINTER 583 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 584 else 585 # Some targets (ARM with Thumb2, for example), can't be built with frame 586 # pointers. For those, we don't have FUNCTION_TRACER automatically 587 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 588 # incompatible with -fomit-frame-pointer with current GCC, so we don't use 589 # -fomit-frame-pointer with FUNCTION_TRACER. 590 ifndef CONFIG_FUNCTION_TRACER 591 KBUILD_CFLAGS += -fomit-frame-pointer 592 endif 593 endif 594 595 ifdef CONFIG_DEBUG_INFO 596 KBUILD_CFLAGS += -g 597 KBUILD_AFLAGS += -gdwarf-2 598 endif 599 600 ifdef CONFIG_DEBUG_INFO_REDUCED 601 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 602 endif 603 604 ifdef CONFIG_FUNCTION_TRACER 605 KBUILD_CFLAGS += -pg 606 ifdef CONFIG_DYNAMIC_FTRACE 607 ifdef CONFIG_HAVE_C_RECORDMCOUNT 608 BUILD_C_RECORDMCOUNT := y 609 export BUILD_C_RECORDMCOUNT 610 endif 611 endif 612 endif 613 614 # We trigger additional mismatches with less inlining 615 ifdef CONFIG_DEBUG_SECTION_MISMATCH 616 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 617 endif 618 619 # arch Makefile may override CC so keep this after arch Makefile is included 620 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 621 CHECKFLAGS += $(NOSTDINC_FLAGS) 622 623 # warn about C99 declaration after statement 624 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 625 626 # disable pointer signed / unsigned warnings in gcc 4.0 627 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 628 629 # disable invalid "can't wrap" optimizations for signed / pointers 630 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 631 632 # conserve stack if available 633 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 634 635 # use the deterministic mode of AR if available 636 KBUILD_ARFLAGS := $(call ar-option,D) 637 638 # check for 'asm goto' 639 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 640 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 641 endif 642 643 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 644 # But warn user when we do so 645 warn-assign = \ 646 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 647 648 ifneq ($(KCPPFLAGS),) 649 $(call warn-assign,CPPFLAGS) 650 KBUILD_CPPFLAGS += $(KCPPFLAGS) 651 endif 652 ifneq ($(KAFLAGS),) 653 $(call warn-assign,AFLAGS) 654 KBUILD_AFLAGS += $(KAFLAGS) 655 endif 656 ifneq ($(KCFLAGS),) 657 $(call warn-assign,CFLAGS) 658 KBUILD_CFLAGS += $(KCFLAGS) 659 endif 660 661 # Use --build-id when available. 662 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 663 $(call cc-ldoption, -Wl$(comma)--build-id,)) 664 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 665 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 666 667 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 668 LDFLAGS_vmlinux += $(call ld-option, -X,) 669 endif 670 671 # Default kernel image to build when no specific target is given. 672 # KBUILD_IMAGE may be overruled on the command line or 673 # set in the environment 674 # Also any assignments in arch/$(ARCH)/Makefile take precedence over 675 # this default value 676 export KBUILD_IMAGE ?= vmlinux 677 678 # 679 # INSTALL_PATH specifies where to place the updated kernel and system map 680 # images. Default is /boot, but you can set it to other values 681 export INSTALL_PATH ?= /boot 682 683 # 684 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 685 # relocations required by build roots. This is not defined in the 686 # makefile but the argument can be passed to make if needed. 687 # 688 689 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 690 export MODLIB 691 692 # 693 # INSTALL_MOD_STRIP, if defined, will cause modules to be 694 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 695 # the default option --strip-debug will be used. Otherwise, 696 # INSTALL_MOD_STRIP value will be used as the options to the strip command. 697 698 ifdef INSTALL_MOD_STRIP 699 ifeq ($(INSTALL_MOD_STRIP),1) 700 mod_strip_cmd = $(STRIP) --strip-debug 701 else 702 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 703 endif # INSTALL_MOD_STRIP=1 704 else 705 mod_strip_cmd = true 706 endif # INSTALL_MOD_STRIP 707 export mod_strip_cmd 708 709 710 ifeq ($(KBUILD_EXTMOD),) 711 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 712 713 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 714 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 715 $(net-y) $(net-m) $(libs-y) $(libs-m))) 716 717 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 718 $(init-n) $(init-) \ 719 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 720 $(net-n) $(net-) $(libs-n) $(libs-)))) 721 722 init-y := $(patsubst %/, %/built-in.o, $(init-y)) 723 core-y := $(patsubst %/, %/built-in.o, $(core-y)) 724 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 725 net-y := $(patsubst %/, %/built-in.o, $(net-y)) 726 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 727 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 728 libs-y := $(libs-y1) $(libs-y2) 729 730 # Build vmlinux 731 # --------------------------------------------------------------------------- 732 # vmlinux is built from the objects selected by $(vmlinux-init) and 733 # $(vmlinux-main). Most are built-in.o files from top-level directories 734 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 735 # Ordering when linking is important, and $(vmlinux-init) must be first. 736 # 737 # vmlinux 738 # ^ 739 # | 740 # +-< $(vmlinux-init) 741 # | +--< init/version.o + more 742 # | 743 # +--< $(vmlinux-main) 744 # | +--< driver/built-in.o mm/built-in.o + more 745 # | 746 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 747 # 748 # vmlinux version (uname -v) cannot be updated during normal 749 # descending-into-subdirs phase since we do not yet know if we need to 750 # update vmlinux. 751 # Therefore this step is delayed until just before final link of vmlinux - 752 # except in the kallsyms case where it is done just before adding the 753 # symbols to the kernel. 754 # 755 # System.map is generated to document addresses of all kernel symbols 756 757 vmlinux-init := $(head-y) $(init-y) 758 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 759 vmlinux-all := $(vmlinux-init) $(vmlinux-main) 760 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 761 export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 762 763 # Rule to link vmlinux - also used during CONFIG_KALLSYMS 764 # May be overridden by arch/$(ARCH)/Makefile 765 quiet_cmd_vmlinux__ ?= LD $@ 766 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 767 -T $(vmlinux-lds) $(vmlinux-init) \ 768 --start-group $(vmlinux-main) --end-group \ 769 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 770 771 # Generate new vmlinux version 772 quiet_cmd_vmlinux_version = GEN .version 773 cmd_vmlinux_version = set -e; \ 774 if [ ! -r .version ]; then \ 775 rm -f .version; \ 776 echo 1 >.version; \ 777 else \ 778 mv .version .old_version; \ 779 expr 0$$(cat .old_version) + 1 >.version; \ 780 fi; \ 781 $(MAKE) $(build)=init 782 783 # Generate System.map 784 quiet_cmd_sysmap = SYSMAP 785 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 786 787 # Link of vmlinux 788 # If CONFIG_KALLSYMS is set .version is already updated 789 # Generate System.map and verify that the content is consistent 790 # Use + in front of the vmlinux_version rule to silent warning with make -j2 791 # First command is ':' to allow us to use + in front of the rule 792 define rule_vmlinux__ 793 : 794 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 795 796 $(call cmd,vmlinux__) 797 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 798 799 $(Q)$(if $($(quiet)cmd_sysmap), \ 800 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 801 $(cmd_sysmap) $@ System.map; \ 802 if [ $$? -ne 0 ]; then \ 803 rm -f $@; \ 804 /bin/false; \ 805 fi; 806 $(verify_kallsyms) 807 endef 808 809 810 ifdef CONFIG_KALLSYMS 811 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 812 # It's a three stage process: 813 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 814 # empty 815 # Running kallsyms on that gives us .tmp_kallsyms1.o with 816 # the right size - vmlinux version (uname -v) is updated during this step 817 # o .tmp_vmlinux2 now has a __kallsyms section of the right size, 818 # but due to the added section, some addresses have shifted. 819 # From here, we generate a correct .tmp_kallsyms2.o 820 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 821 # o Verify that the System.map from vmlinux matches the map from 822 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 823 # o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using 824 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 825 # temporary bypass to allow the kernel to be built while the 826 # maintainers work out what went wrong with kallsyms. 827 828 last_kallsyms := 2 829 830 ifdef KALLSYMS_EXTRA_PASS 831 ifneq ($(KALLSYMS_EXTRA_PASS),0) 832 last_kallsyms := 3 833 endif 834 endif 835 836 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 837 838 define verify_kallsyms 839 $(Q)$(if $($(quiet)cmd_sysmap), \ 840 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 841 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 842 $(Q)cmp -s System.map .tmp_System.map || \ 843 (echo Inconsistent kallsyms data; \ 844 echo This is a bug - please report about it; \ 845 echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \ 846 rm .tmp_kallsyms* ; /bin/false ) 847 endef 848 849 # Update vmlinux version before link 850 # Use + in front of this rule to silent warning about make -j1 851 # First command is ':' to allow us to use + in front of this rule 852 cmd_ksym_ld = $(cmd_vmlinux__) 853 define rule_ksym_ld 854 : 855 +$(call cmd,vmlinux_version) 856 $(call cmd,vmlinux__) 857 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 858 endef 859 860 # Generate .S file with all kernel symbols 861 quiet_cmd_kallsyms = KSYM $@ 862 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 863 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 864 865 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 866 $(call if_changed_dep,as_o_S) 867 868 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 869 $(call cmd,kallsyms) 870 871 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 872 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 873 $(call if_changed_rule,ksym_ld) 874 875 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 876 $(call if_changed,vmlinux__) 877 878 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 879 $(call if_changed,vmlinux__) 880 881 # Needs to visit scripts/ before $(KALLSYMS) can be used. 882 $(KALLSYMS): scripts ; 883 884 # Generate some data for debugging strange kallsyms problems 885 debug_kallsyms: .tmp_map$(last_kallsyms) 886 887 .tmp_map%: .tmp_vmlinux% FORCE 888 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 889 890 .tmp_map3: .tmp_map2 891 892 .tmp_map2: .tmp_map1 893 894 endif # ifdef CONFIG_KALLSYMS 895 896 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has 897 # relevant sections renamed as per the linker script. 898 quiet_cmd_vmlinux-modpost = LD $@ 899 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 900 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 901 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 902 define rule_vmlinux-modpost 903 : 904 +$(call cmd,vmlinux-modpost) 905 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 906 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 907 endef 908 909 # vmlinux image - including updated kernel symbols 910 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 911 ifdef CONFIG_HEADERS_CHECK 912 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 913 endif 914 ifdef CONFIG_SAMPLES 915 $(Q)$(MAKE) $(build)=samples 916 endif 917 ifdef CONFIG_BUILD_DOCSRC 918 $(Q)$(MAKE) $(build)=Documentation 919 endif 920 $(call vmlinux-modpost) 921 $(call if_changed_rule,vmlinux__) 922 $(Q)rm -f .old_version 923 924 # build vmlinux.o first to catch section mismatch errors early 925 ifdef CONFIG_KALLSYMS 926 .tmp_vmlinux1: vmlinux.o 927 endif 928 929 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 930 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 931 $(call if_changed_rule,vmlinux-modpost) 932 933 # The actual objects are generated when descending, 934 # make sure no implicit rule kicks in 935 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 936 937 # Handle descending into subdirectories listed in $(vmlinux-dirs) 938 # Preset locale variables to speed up the build process. Limit locale 939 # tweaks to this spot to avoid wrong language settings when running 940 # make menuconfig etc. 941 # Error messages still appears in the original language 942 943 PHONY += $(vmlinux-dirs) 944 $(vmlinux-dirs): prepare scripts 945 $(Q)$(MAKE) $(build)=$@ 946 947 # Store (new) KERNELRELASE string in include/config/kernel.release 948 include/config/kernel.release: include/config/auto.conf FORCE 949 $(Q)rm -f $@ 950 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 951 952 953 # Things we need to do before we recursively start building the kernel 954 # or the modules are listed in "prepare". 955 # A multi level approach is used. prepareN is processed before prepareN-1. 956 # archprepare is used in arch Makefiles and when processed asm symlink, 957 # version.h and scripts_basic is processed / created. 958 959 # Listed in dependency order 960 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 961 962 # prepare3 is used to check if we are building in a separate output directory, 963 # and if so do: 964 # 1) Check that make has not been executed in the kernel src $(srctree) 965 prepare3: include/config/kernel.release 966 ifneq ($(KBUILD_SRC),) 967 @$(kecho) ' Using $(srctree) as source for kernel' 968 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 969 echo " $(srctree) is not clean, please run 'make mrproper'";\ 970 echo " in the '$(srctree)' directory.";\ 971 /bin/false; \ 972 fi; 973 endif 974 975 # prepare2 creates a makefile if using a separate output directory 976 prepare2: prepare3 outputmakefile asm-generic 977 978 prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 979 include/config/auto.conf 980 $(cmd_crmodverdir) 981 982 archprepare: prepare1 scripts_basic 983 984 prepare0: archprepare FORCE 985 $(Q)$(MAKE) $(build)=. 986 $(Q)$(MAKE) $(build)=. missing-syscalls 987 988 # All the preparing.. 989 prepare: prepare0 990 991 # Generate some files 992 # --------------------------------------------------------------------------- 993 994 # KERNELRELEASE can change from a few different places, meaning version.h 995 # needs to be updated, so this check is forced on all builds 996 997 uts_len := 64 998 define filechk_utsrelease.h 999 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1000 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1001 exit 1; \ 1002 fi; \ 1003 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1004 endef 1005 1006 define filechk_version.h 1007 (echo \#define LINUX_VERSION_CODE $(shell \ 1008 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1009 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1010 endef 1011 1012 include/linux/version.h: $(srctree)/Makefile FORCE 1013 $(call filechk,version.h) 1014 1015 include/generated/utsrelease.h: include/config/kernel.release FORCE 1016 $(call filechk,utsrelease.h) 1017 1018 PHONY += headerdep 1019 headerdep: 1020 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1021 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1022 1023 # --------------------------------------------------------------------------- 1024 1025 PHONY += depend dep 1026 depend dep: 1027 @echo '*** Warning: make $@ is unnecessary now.' 1028 1029 # --------------------------------------------------------------------------- 1030 # Firmware install 1031 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1032 export INSTALL_FW_PATH 1033 1034 PHONY += firmware_install 1035 firmware_install: FORCE 1036 @mkdir -p $(objtree)/firmware 1037 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1038 1039 # --------------------------------------------------------------------------- 1040 # Kernel headers 1041 1042 #Default location for installed headers 1043 export INSTALL_HDR_PATH = $(objtree)/usr 1044 1045 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1046 1047 # If we do an all arch process set dst to asm-$(hdr-arch) 1048 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1049 1050 PHONY += __headers 1051 __headers: include/linux/version.h scripts_basic asm-generic FORCE 1052 $(Q)$(MAKE) $(build)=scripts build_unifdef 1053 1054 PHONY += headers_install_all 1055 headers_install_all: 1056 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1057 1058 PHONY += headers_install 1059 headers_install: __headers 1060 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1061 $(error Headers not exportable for the $(SRCARCH) architecture)) 1062 $(Q)$(MAKE) $(hdr-inst)=include 1063 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1064 1065 PHONY += headers_check_all 1066 headers_check_all: headers_install_all 1067 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1068 1069 PHONY += headers_check 1070 headers_check: headers_install 1071 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1073 1074 # --------------------------------------------------------------------------- 1075 # Modules 1076 1077 ifdef CONFIG_MODULES 1078 1079 # By default, build modules as well 1080 1081 all: modules 1082 1083 # Build modules 1084 # 1085 # A module can be listed more than once in obj-m resulting in 1086 # duplicate lines in modules.order files. Those are removed 1087 # using awk while concatenating to the final file. 1088 1089 PHONY += modules 1090 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1091 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1092 @$(kecho) ' Building modules, stage 2.'; 1093 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1094 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1095 1096 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1097 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1098 1099 %/modules.builtin: include/config/auto.conf 1100 $(Q)$(MAKE) $(modbuiltin)=$* 1101 1102 1103 # Target to prepare building external modules 1104 PHONY += modules_prepare 1105 modules_prepare: prepare scripts 1106 1107 # Target to install modules 1108 PHONY += modules_install 1109 modules_install: _modinst_ _modinst_post 1110 1111 PHONY += _modinst_ 1112 _modinst_: 1113 @rm -rf $(MODLIB)/kernel 1114 @rm -f $(MODLIB)/source 1115 @mkdir -p $(MODLIB)/kernel 1116 @ln -s $(srctree) $(MODLIB)/source 1117 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1118 rm -f $(MODLIB)/build ; \ 1119 ln -s $(objtree) $(MODLIB)/build ; \ 1120 fi 1121 @cp -f $(objtree)/modules.order $(MODLIB)/ 1122 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1124 1125 # This depmod is only for convenience to give the initial 1126 # boot a modules.dep even before / is mounted read-write. However the 1127 # boot script depmod is the master version. 1128 PHONY += _modinst_post 1129 _modinst_post: _modinst_ 1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1131 $(call cmd,depmod) 1132 1133 else # CONFIG_MODULES 1134 1135 # Modules not configured 1136 # --------------------------------------------------------------------------- 1137 1138 modules modules_install: FORCE 1139 @echo 1140 @echo "The present kernel configuration has modules disabled." 1141 @echo "Type 'make config' and enable loadable module support." 1142 @echo "Then build a kernel with module support enabled." 1143 @echo 1144 @exit 1 1145 1146 endif # CONFIG_MODULES 1147 1148 ### 1149 # Cleaning is done on three levels. 1150 # make clean Delete most generated files 1151 # Leave enough to build external modules 1152 # make mrproper Delete the current configuration, and all generated files 1153 # make distclean Remove editor backup files, patch leftover files and the like 1154 1155 # Directories & files removed with 'make clean' 1156 CLEAN_DIRS += $(MODVERDIR) 1157 CLEAN_FILES += vmlinux System.map \ 1158 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1159 1160 # Directories & files removed with 'make mrproper' 1161 MRPROPER_DIRS += include/config usr/include include/generated \ 1162 arch/*/include/generated 1163 MRPROPER_FILES += .config .config.old .version .old_version \ 1164 include/linux/version.h \ 1165 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1166 1167 # clean - Delete most, but leave enough to build external modules 1168 # 1169 clean: rm-dirs := $(CLEAN_DIRS) 1170 clean: rm-files := $(CLEAN_FILES) 1171 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation) 1172 1173 PHONY += $(clean-dirs) clean archclean 1174 $(clean-dirs): 1175 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1176 1177 clean: archclean 1178 1179 # mrproper - Delete all generated files, including .config 1180 # 1181 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1182 mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1183 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1184 1185 PHONY += $(mrproper-dirs) mrproper archmrproper 1186 $(mrproper-dirs): 1187 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1188 1189 mrproper: clean archmrproper $(mrproper-dirs) 1190 $(call cmd,rmdirs) 1191 $(call cmd,rmfiles) 1192 1193 # distclean 1194 # 1195 PHONY += distclean 1196 1197 distclean: mrproper 1198 @find $(srctree) $(RCS_FIND_IGNORE) \ 1199 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1200 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1201 -o -name '.*.rej' -o -size 0 \ 1202 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1203 -type f -print | xargs rm -f 1204 1205 1206 # Packaging of the kernel to various formats 1207 # --------------------------------------------------------------------------- 1208 # rpm target kept for backward compatibility 1209 package-dir := $(srctree)/scripts/package 1210 1211 %src-pkg: FORCE 1212 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1213 %pkg: include/config/kernel.release FORCE 1214 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1215 rpm: include/config/kernel.release FORCE 1216 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1217 1218 1219 # Brief documentation of the typical targets used 1220 # --------------------------------------------------------------------------- 1221 1222 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1223 boards := $(notdir $(boards)) 1224 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1225 board-dirs := $(sort $(notdir $(board-dirs:/=))) 1226 1227 help: 1228 @echo 'Cleaning targets:' 1229 @echo ' clean - Remove most generated files but keep the config and' 1230 @echo ' enough build support to build external modules' 1231 @echo ' mrproper - Remove all generated files + config + various backup files' 1232 @echo ' distclean - mrproper + remove editor backup and patch files' 1233 @echo '' 1234 @echo 'Configuration targets:' 1235 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1236 @echo '' 1237 @echo 'Other generic targets:' 1238 @echo ' all - Build all targets marked with [*]' 1239 @echo '* vmlinux - Build the bare kernel' 1240 @echo '* modules - Build all modules' 1241 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1242 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1243 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1244 @echo ' dir/ - Build all files in dir and below' 1245 @echo ' dir/file.[oisS] - Build specified target only' 1246 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1247 @echo ' (requires a recent binutils and recent build (System.map))' 1248 @echo ' dir/file.ko - Build module including final link' 1249 @echo ' modules_prepare - Set up for building external modules' 1250 @echo ' tags/TAGS - Generate tags file for editors' 1251 @echo ' cscope - Generate cscope index' 1252 @echo ' gtags - Generate GNU GLOBAL index' 1253 @echo ' kernelrelease - Output the release version string' 1254 @echo ' kernelversion - Output the version stored in Makefile' 1255 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1256 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1257 echo '' 1258 @echo 'Static analysers' 1259 @echo ' checkstack - Generate a list of stack hogs' 1260 @echo ' namespacecheck - Name space analysis on compiled kernel' 1261 @echo ' versioncheck - Sanity check on version.h usage' 1262 @echo ' includecheck - Check for duplicate included header files' 1263 @echo ' export_report - List the usages of all exported symbols' 1264 @echo ' headers_check - Sanity check on exported headers' 1265 @echo ' headerdep - Detect inclusion cycles in headers' 1266 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1267 @echo '' 1268 @echo 'Kernel packaging:' 1269 @$(MAKE) $(build)=$(package-dir) help 1270 @echo '' 1271 @echo 'Documentation targets:' 1272 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1273 @echo '' 1274 @echo 'Architecture specific targets ($(SRCARCH)):' 1275 @$(if $(archhelp),$(archhelp),\ 1276 echo ' No architecture specific help defined for $(SRCARCH)') 1277 @echo '' 1278 @$(if $(boards), \ 1279 $(foreach b, $(boards), \ 1280 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1281 echo '') 1282 @$(if $(board-dirs), \ 1283 $(foreach b, $(board-dirs), \ 1284 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1285 printf " %-16s - Show all of the above\\n" help-boards; \ 1286 echo '') 1287 1288 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1289 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1290 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1291 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1292 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1293 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1294 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1295 @echo ' 1: warnings which may be relevant and do not occur too often' 1296 @echo ' 2: warnings which occur quite often but may still be relevant' 1297 @echo ' 3: more obscure warnings, can most likely be ignored' 1298 @echo ' Multiple levels can be combined with W=12 or W=123' 1299 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1300 @echo '' 1301 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1302 @echo 'For further info see the ./README file' 1303 1304 1305 help-board-dirs := $(addprefix help-,$(board-dirs)) 1306 1307 help-boards: $(help-board-dirs) 1308 1309 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1310 1311 $(help-board-dirs): help-%: 1312 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1313 @$(if $(boards-per-dir), \ 1314 $(foreach b, $(boards-per-dir), \ 1315 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1316 echo '') 1317 1318 1319 # Documentation targets 1320 # --------------------------------------------------------------------------- 1321 %docs: scripts_basic FORCE 1322 $(Q)$(MAKE) $(build)=scripts build_docproc 1323 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1324 1325 else # KBUILD_EXTMOD 1326 1327 ### 1328 # External module support. 1329 # When building external modules the kernel used as basis is considered 1330 # read-only, and no consistency checks are made and the make 1331 # system is not used on the basis kernel. If updates are required 1332 # in the basis kernel ordinary make commands (without M=...) must 1333 # be used. 1334 # 1335 # The following are the only valid targets when building external 1336 # modules. 1337 # make M=dir clean Delete all automatically generated files 1338 # make M=dir modules Make all modules in specified dir 1339 # make M=dir Same as 'make M=dir modules' 1340 # make M=dir modules_install 1341 # Install the modules built in the module directory 1342 # Assumes install directory is already created 1343 1344 # We are always building modules 1345 KBUILD_MODULES := 1 1346 PHONY += crmodverdir 1347 crmodverdir: 1348 $(cmd_crmodverdir) 1349 1350 PHONY += $(objtree)/Module.symvers 1351 $(objtree)/Module.symvers: 1352 @test -e $(objtree)/Module.symvers || ( \ 1353 echo; \ 1354 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1355 echo " is missing; modules will have no dependencies and modversions."; \ 1356 echo ) 1357 1358 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1359 PHONY += $(module-dirs) modules 1360 $(module-dirs): crmodverdir $(objtree)/Module.symvers 1361 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1362 1363 modules: $(module-dirs) 1364 @$(kecho) ' Building modules, stage 2.'; 1365 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1366 1367 PHONY += modules_install 1368 modules_install: _emodinst_ _emodinst_post 1369 1370 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1371 PHONY += _emodinst_ 1372 _emodinst_: 1373 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1374 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1375 1376 PHONY += _emodinst_post 1377 _emodinst_post: _emodinst_ 1378 $(call cmd,depmod) 1379 1380 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1381 1382 PHONY += $(clean-dirs) clean 1383 $(clean-dirs): 1384 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1385 1386 clean: rm-dirs := $(MODVERDIR) 1387 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1388 1389 help: 1390 @echo ' Building external modules.' 1391 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1392 @echo '' 1393 @echo ' modules - default target, build the module(s)' 1394 @echo ' modules_install - install the module' 1395 @echo ' clean - remove generated files in module directory only' 1396 @echo '' 1397 1398 # Dummies... 1399 PHONY += prepare scripts 1400 prepare: ; 1401 scripts: ; 1402 endif # KBUILD_EXTMOD 1403 1404 clean: $(clean-dirs) 1405 $(call cmd,rmdirs) 1406 $(call cmd,rmfiles) 1407 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1408 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1409 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1410 -o -name '*.symtypes' -o -name 'modules.order' \ 1411 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1412 -o -name '*.gcno' \) -type f -print | xargs rm -f 1413 1414 # Generate tags for editors 1415 # --------------------------------------------------------------------------- 1416 quiet_cmd_tags = GEN $@ 1417 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1418 1419 tags TAGS cscope gtags: FORCE 1420 $(call cmd,tags) 1421 1422 # Scripts to check various things for consistency 1423 # --------------------------------------------------------------------------- 1424 1425 PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1426 1427 includecheck: 1428 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1429 -name '*.[hcS]' -type f -print | sort \ 1430 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1431 1432 versioncheck: 1433 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1434 -name '*.[hcS]' -type f -print | sort \ 1435 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1436 1437 coccicheck: 1438 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1439 1440 namespacecheck: 1441 $(PERL) $(srctree)/scripts/namespace.pl 1442 1443 export_report: 1444 $(PERL) $(srctree)/scripts/export_report.pl 1445 1446 endif #ifeq ($(config-targets),1) 1447 endif #ifeq ($(mixed-targets),1) 1448 1449 PHONY += checkstack kernelrelease kernelversion 1450 1451 # UML needs a little special treatment here. It wants to use the host 1452 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1453 # else wants $(ARCH), including people doing cross-builds, which means 1454 # that $(SUBARCH) doesn't work here. 1455 ifeq ($(ARCH), um) 1456 CHECKSTACK_ARCH := $(SUBARCH) 1457 else 1458 CHECKSTACK_ARCH := $(ARCH) 1459 endif 1460 checkstack: 1461 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1462 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1463 1464 kernelrelease: 1465 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1466 1467 kernelversion: 1468 @echo $(KERNELVERSION) 1469 1470 # Single targets 1471 # --------------------------------------------------------------------------- 1472 # Single targets are compatible with: 1473 # - build with mixed source and output 1474 # - build with separate output dir 'make O=...' 1475 # - external modules 1476 # 1477 # target-dir => where to store outputfile 1478 # build-dir => directory in kernel source tree to use 1479 1480 ifeq ($(KBUILD_EXTMOD),) 1481 build-dir = $(patsubst %/,%,$(dir $@)) 1482 target-dir = $(dir $@) 1483 else 1484 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1485 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1486 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1487 endif 1488 1489 %.s: %.c prepare scripts FORCE 1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1491 %.i: %.c prepare scripts FORCE 1492 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1493 %.o: %.c prepare scripts FORCE 1494 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1495 %.lst: %.c prepare scripts FORCE 1496 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1497 %.s: %.S prepare scripts FORCE 1498 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1499 %.o: %.S prepare scripts FORCE 1500 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1501 %.symtypes: %.c prepare scripts FORCE 1502 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1503 1504 # Modules 1505 /: prepare scripts FORCE 1506 $(cmd_crmodverdir) 1507 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1508 $(build)=$(build-dir) 1509 %/: prepare scripts FORCE 1510 $(cmd_crmodverdir) 1511 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1512 $(build)=$(build-dir) 1513 %.ko: prepare scripts FORCE 1514 $(cmd_crmodverdir) 1515 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1516 $(build)=$(build-dir) $(@:.ko=.o) 1517 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1518 1519 # FIXME Should go into a make.lib or something 1520 # =========================================================================== 1521 1522 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1523 cmd_rmdirs = rm -rf $(rm-dirs) 1524 1525 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1526 cmd_rmfiles = rm -f $(rm-files) 1527 1528 # Run depmod only if we have System.map and depmod is executable 1529 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1530 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1531 $(KERNELRELEASE) 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 $(KBUILD_AFLAGS_KERNEL) \ 1540 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1541 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1542 1543 quiet_cmd_as_o_S = AS $@ 1544 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1545 1546 # read all saved command lines 1547 1548 targets := $(wildcard $(sort $(targets))) 1549 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1550 1551 ifneq ($(cmd_files),) 1552 $(cmd_files): ; # Do not try to update included dependency files 1553 include $(cmd_files) 1554 endif 1555 1556 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1557 # Usage: 1558 # $(Q)$(MAKE) $(clean)=dir 1559 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1560 1561 endif # skip-makefile 1562 1563 PHONY += FORCE 1564 FORCE: 1565 1566 # Declare the contents of the .PHONY variable as phony. We keep that 1567 # information in a variable so we can use it in if_changed and friends. 1568 .PHONY: $(PHONY) 1569