1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 38 4EXTRAVERSION = 5NAME = Flesh-Eating Bats with Fangs 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 ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# Avoid funny character set dependencies 20unexport LC_ALL 21LC_COLLATE=C 22LC_NUMERIC=C 23export 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 44ifeq ("$(origin V)", "command line") 45 KBUILD_VERBOSE = $(V) 46endif 47ifndef KBUILD_VERBOSE 48 KBUILD_VERBOSE = 0 49endif 50 51# Call a source code checker (by default, "sparse") as part of the 52# C compilation. 53# 54# Use 'make C=1' to enable checking of only re-compiled files. 55# Use 'make C=2' to enable checking of *all* source files, regardless 56# of whether they are re-compiled or not. 57# 58# See the file "Documentation/sparse.txt" for more details, including 59# where to get the "sparse" utility. 60 61ifeq ("$(origin C)", "command line") 62 KBUILD_CHECKSRC = $(C) 63endif 64ifndef KBUILD_CHECKSRC 65 KBUILD_CHECKSRC = 0 66endif 67 68# Use make M=dir to specify directory of external module to build 69# Old syntax make ... SUBDIRS=$PWD is still supported 70# Setting the environment variable KBUILD_EXTMOD take precedence 71ifdef SUBDIRS 72 KBUILD_EXTMOD ?= $(SUBDIRS) 73endif 74 75ifeq ("$(origin M)", "command line") 76 KBUILD_EXTMOD := $(M) 77endif 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(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? 101ifeq ("$(origin O)", "command line") 102 KBUILD_OUTPUT := $(O) 103endif 104 105# That's our default target when none is given on the command line 106PHONY := _all 107_all: 108 109# Cancel implicit rules on top Makefile 110$(CURDIR)/Makefile Makefile: ; 111 112ifneq ($(KBUILD_OUTPUT),) 113# Invoke a second make in the output directory, passing relevant variables 114# check that the output directory actually exists 115saved-output := $(KBUILD_OUTPUT) 116KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 117$(if $(KBUILD_OUTPUT),, \ 118 $(error output directory "$(saved-output)" does not exist)) 119 120PHONY += $(MAKECMDGOALS) sub-make 121 122$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 123 $(Q)@: 124 125sub-make: FORCE 126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 127 KBUILD_SRC=$(CURDIR) \ 128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 129 $(filter-out _all sub-make,$(MAKECMDGOALS)) 130 131# Leave processing to above invocation of make 132skip-makefile := 1 133endif # ifneq ($(KBUILD_OUTPUT),) 134endif # ifeq ($(KBUILD_SRC),) 135 136# We process the rest of the Makefile if this is the final invocation of make 137ifeq ($(skip-makefile),) 138 139# If building an external module we do not care about the all: rule 140# but instead _all depend on modules 141PHONY += all 142ifeq ($(KBUILD_EXTMOD),) 143_all: all 144else 145_all: modules 146endif 147 148srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 149objtree := $(CURDIR) 150src := $(srctree) 151obj := $(objtree) 152 153VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 154 155export srctree objtree VPATH 156 157 158# SUBARCH tells the usermode build what the underlying arch is. That is set 159# first, and if a usermode build is happening, the "ARCH=um" on the command 160# line overrides the setting of ARCH below. If a native build is happening, 161# then ARCH is assigned, getting whatever value it gets normally, and 162# SUBARCH is subsequently ignored. 163 164SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 165 -e s/arm.*/arm/ -e s/sa110/arm/ \ 166 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 168 -e s/sh[234].*/sh/ ) 169 170# Cross compiling and selecting different set of gcc/bin-utils 171# --------------------------------------------------------------------------- 172# 173# When performing cross compilation for other architectures ARCH shall be set 174# to the target architecture. (See arch/* for the possibilities). 175# ARCH can be set during invocation of make: 176# make ARCH=ia64 177# Another way is to have ARCH set in the environment. 178# The default ARCH is the host where make is executed. 179 180# CROSS_COMPILE specify the prefix used for all executables used 181# during compilation. Only gcc and related bin-utils executables 182# are prefixed with $(CROSS_COMPILE). 183# CROSS_COMPILE can be set on the command line 184# make CROSS_COMPILE=ia64-linux- 185# Alternatively CROSS_COMPILE can be set in the environment. 186# A third alternative is to store a setting in .config so that plain 187# "make" in the configured kernel build directory always uses that. 188# Default value for CROSS_COMPILE is not to prefix executables 189# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 190export KBUILD_BUILDHOST := $(SUBARCH) 191ARCH ?= $(SUBARCH) 192CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 193 194# Architecture as present in compile.h 195UTS_MACHINE := $(ARCH) 196SRCARCH := $(ARCH) 197 198# Additional ARCH settings for x86 199ifeq ($(ARCH),i386) 200 SRCARCH := x86 201endif 202ifeq ($(ARCH),x86_64) 203 SRCARCH := x86 204endif 205 206# Additional ARCH settings for sparc 207ifeq ($(ARCH),sparc32) 208 SRCARCH := sparc 209endif 210ifeq ($(ARCH),sparc64) 211 SRCARCH := sparc 212endif 213 214# Additional ARCH settings for sh 215ifeq ($(ARCH),sh64) 216 SRCARCH := sh 217endif 218 219# Where to locate arch specific headers 220hdr-arch := $(SRCARCH) 221 222ifeq ($(ARCH),m68knommu) 223 hdr-arch := m68k 224endif 225 226KCONFIG_CONFIG ?= .config 227export KCONFIG_CONFIG 228 229# SHELL used by kbuild 230CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 231 else if [ -x /bin/bash ]; then echo /bin/bash; \ 232 else echo sh; fi ; fi) 233 234HOSTCC = gcc 235HOSTCXX = g++ 236HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 237HOSTCXXFLAGS = -O2 238 239# Decide whether to build built-in, modular, or both. 240# Normally, just do built-in. 241 242KBUILD_MODULES := 243KBUILD_BUILTIN := 1 244 245# If we have only "make modules", don't compile built-in objects. 246# When we're building modules with modversions, we need to consider 247# the built-in objects during the descend as well, in order to 248# make sure the checksums are up to date before we record them. 249 250ifeq ($(MAKECMDGOALS),modules) 251 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 252endif 253 254# If we have "make <whatever> modules", compile modules 255# in addition to whatever we do anyway. 256# Just "make" or "make all" shall build modules as well 257 258ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 259 KBUILD_MODULES := 1 260endif 261 262ifeq ($(MAKECMDGOALS),) 263 KBUILD_MODULES := 1 264endif 265 266export KBUILD_MODULES KBUILD_BUILTIN 267export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 268 269# Beautify output 270# --------------------------------------------------------------------------- 271# 272# Normally, we echo the whole command before executing it. By making 273# that echo $($(quiet)$(cmd)), we now have the possibility to set 274# $(quiet) to choose other forms of output instead, e.g. 275# 276# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 277# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 278# 279# If $(quiet) is empty, the whole command will be printed. 280# If it is set to "quiet_", only the short version will be printed. 281# If it is set to "silent_", nothing will be printed at all, since 282# the variable $(silent_cmd_cc_o_c) doesn't exist. 283# 284# A simple variant is to prefix commands with $(Q) - that's useful 285# for commands that shall be hidden in non-verbose mode. 286# 287# $(Q)ln $@ :< 288# 289# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 290# If KBUILD_VERBOSE equals 1 then the above command is displayed. 291 292ifeq ($(KBUILD_VERBOSE),1) 293 quiet = 294 Q = 295else 296 quiet=quiet_ 297 Q = @ 298endif 299 300# If the user is running make -s (silent mode), suppress echoing of 301# commands 302 303ifneq ($(findstring s,$(MAKEFLAGS)),) 304 quiet=silent_ 305endif 306 307export quiet Q KBUILD_VERBOSE 308 309 310# Look for make include files relative to root of kernel src 311MAKEFLAGS += --include-dir=$(srctree) 312 313# We need some generic definitions (do not try to remake the file). 314$(srctree)/scripts/Kbuild.include: ; 315include $(srctree)/scripts/Kbuild.include 316 317# Make variables (CC, etc...) 318 319AS = $(CROSS_COMPILE)as 320LD = $(CROSS_COMPILE)ld 321CC = $(CROSS_COMPILE)gcc 322CPP = $(CC) -E 323AR = $(CROSS_COMPILE)ar 324NM = $(CROSS_COMPILE)nm 325STRIP = $(CROSS_COMPILE)strip 326OBJCOPY = $(CROSS_COMPILE)objcopy 327OBJDUMP = $(CROSS_COMPILE)objdump 328AWK = awk 329GENKSYMS = scripts/genksyms/genksyms 330INSTALLKERNEL := installkernel 331DEPMOD = /sbin/depmod 332KALLSYMS = scripts/kallsyms 333PERL = perl 334CHECK = sparse 335 336CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 337 -Wbitwise -Wno-return-void $(CF) 338CFLAGS_MODULE = 339AFLAGS_MODULE = 340LDFLAGS_MODULE = 341CFLAGS_KERNEL = 342AFLAGS_KERNEL = 343CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 344 345 346# Use LINUXINCLUDE when you must reference the include/ directory. 347# Needed to be compatible with the O= option 348LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 349 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 350 -include include/generated/autoconf.h 351 352KBUILD_CPPFLAGS := -D__KERNEL__ 353 354KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 355 -fno-strict-aliasing -fno-common \ 356 -Werror-implicit-function-declaration \ 357 -Wno-format-security \ 358 -fno-delete-null-pointer-checks 359KBUILD_AFLAGS_KERNEL := 360KBUILD_CFLAGS_KERNEL := 361KBUILD_AFLAGS := -D__ASSEMBLY__ 362KBUILD_AFLAGS_MODULE := -DMODULE 363KBUILD_CFLAGS_MODULE := -DMODULE 364KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 365 366# Read KERNELRELEASE from include/config/kernel.release (if it exists) 367KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 368KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 369 370export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 371export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 372export CPP AR NM STRIP OBJCOPY OBJDUMP 373export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 374export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 375 376export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 377export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 378export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 379export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 380export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 381 382# When compiling out-of-tree modules, put MODVERDIR in the module 383# tree rather than in the kernel tree. The kernel tree might 384# even be read-only. 385export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 386 387# Files to ignore in find ... statements 388 389RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 390export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 391 392# =========================================================================== 393# Rules shared between *config targets and build targets 394 395# Basic helpers built in scripts/ 396PHONY += scripts_basic 397scripts_basic: 398 $(Q)$(MAKE) $(build)=scripts/basic 399 $(Q)rm -f .tmp_quiet_recordmcount 400 401# To avoid any implicit rule to kick in, define an empty command. 402scripts/basic/%: scripts_basic ; 403 404PHONY += outputmakefile 405# outputmakefile generates a Makefile in the output directory, if using a 406# separate output directory. This allows convenient use of make in the 407# output directory. 408outputmakefile: 409ifneq ($(KBUILD_SRC),) 410 $(Q)ln -fsn $(srctree) source 411 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 412 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 413endif 414 415# To make sure we do not include .config for any of the *config targets 416# catch them early, and hand them over to scripts/kconfig/Makefile 417# It is allowed to specify more targets when calling make, including 418# mixing *config targets and build targets. 419# For example 'make oldconfig all'. 420# Detect when mixed targets is specified, and make a second invocation 421# of make so .config is not included in this case either (for *config). 422 423no-dot-config-targets := clean mrproper distclean \ 424 cscope TAGS tags help %docs check% coccicheck \ 425 include/linux/version.h headers_% \ 426 kernelversion %src-pkg 427 428config-targets := 0 429mixed-targets := 0 430dot-config := 1 431 432ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 433 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 434 dot-config := 0 435 endif 436endif 437 438ifeq ($(KBUILD_EXTMOD),) 439 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 440 config-targets := 1 441 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 442 mixed-targets := 1 443 endif 444 endif 445endif 446 447ifeq ($(mixed-targets),1) 448# =========================================================================== 449# We're called with mixed targets (*config and build targets). 450# Handle them one by one. 451 452%:: FORCE 453 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 454 455else 456ifeq ($(config-targets),1) 457# =========================================================================== 458# *config targets only - make sure prerequisites are updated, and descend 459# in scripts/kconfig to make the *config target 460 461# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 462# KBUILD_DEFCONFIG may point out an alternative default configuration 463# used for 'make defconfig' 464include $(srctree)/arch/$(SRCARCH)/Makefile 465export KBUILD_DEFCONFIG KBUILD_KCONFIG 466 467config: scripts_basic outputmakefile FORCE 468 $(Q)mkdir -p include/linux include/config 469 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 470 471%config: scripts_basic outputmakefile FORCE 472 $(Q)mkdir -p include/linux include/config 473 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 474 475else 476# =========================================================================== 477# Build targets only - this includes vmlinux, arch specific targets, clean 478# targets and others. In general all targets except *config targets. 479 480ifeq ($(KBUILD_EXTMOD),) 481# Additional helpers built in scripts/ 482# Carefully list dependencies so we do not try to build scripts twice 483# in parallel 484PHONY += scripts 485scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 486 $(Q)$(MAKE) $(build)=$(@) 487 488# Objects we will link into vmlinux / subdirs we need to visit 489init-y := init/ 490drivers-y := drivers/ sound/ firmware/ 491net-y := net/ 492libs-y := lib/ 493core-y := usr/ 494endif # KBUILD_EXTMOD 495 496ifeq ($(dot-config),1) 497# Read in config 498-include include/config/auto.conf 499 500ifeq ($(KBUILD_EXTMOD),) 501# Read in dependencies to all Kconfig* files, make sure to run 502# oldconfig if changes are detected. 503-include include/config/auto.conf.cmd 504 505# To avoid any implicit rule to kick in, define an empty command 506$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 507 508# If .config is newer than include/config/auto.conf, someone tinkered 509# with it and forgot to run make oldconfig. 510# if auto.conf.cmd is missing then we are probably in a cleaned tree so 511# we execute the config step to be sure to catch updated Kconfig files 512include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 513 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 514else 515# external modules needs include/generated/autoconf.h and include/config/auto.conf 516# but do not care if they are up-to-date. Use auto.conf to trigger the test 517PHONY += include/config/auto.conf 518 519include/config/auto.conf: 520 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 521 echo; \ 522 echo " ERROR: Kernel configuration is invalid."; \ 523 echo " include/generated/autoconf.h or $@ are missing.";\ 524 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 525 echo; \ 526 /bin/false) 527 528endif # KBUILD_EXTMOD 529 530else 531# Dummy target needed, because used as prerequisite 532include/config/auto.conf: ; 533endif # $(dot-config) 534 535# The all: target is the default when no target is given on the 536# command line. 537# This allow a user to issue only 'make' to build a kernel including modules 538# Defaults to vmlinux, but the arch makefile usually adds further targets 539all: vmlinux 540 541ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 542KBUILD_CFLAGS += -Os 543else 544KBUILD_CFLAGS += -O2 545endif 546 547include $(srctree)/arch/$(SRCARCH)/Makefile 548 549ifneq ($(CONFIG_FRAME_WARN),0) 550KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 551endif 552 553# Force gcc to behave correct even for buggy distributions 554ifndef CONFIG_CC_STACKPROTECTOR 555KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 556endif 557 558ifdef CONFIG_FRAME_POINTER 559KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 560else 561# Some targets (ARM with Thumb2, for example), can't be built with frame 562# pointers. For those, we don't have FUNCTION_TRACER automatically 563# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 564# incompatible with -fomit-frame-pointer with current GCC, so we don't use 565# -fomit-frame-pointer with FUNCTION_TRACER. 566ifndef CONFIG_FUNCTION_TRACER 567KBUILD_CFLAGS += -fomit-frame-pointer 568endif 569endif 570 571ifdef CONFIG_DEBUG_INFO 572KBUILD_CFLAGS += -g 573KBUILD_AFLAGS += -gdwarf-2 574endif 575 576ifdef CONFIG_DEBUG_INFO_REDUCED 577KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 578endif 579 580ifdef CONFIG_FUNCTION_TRACER 581KBUILD_CFLAGS += -pg 582ifdef CONFIG_DYNAMIC_FTRACE 583 ifdef CONFIG_HAVE_C_RECORDMCOUNT 584 BUILD_C_RECORDMCOUNT := y 585 export BUILD_C_RECORDMCOUNT 586 endif 587endif 588endif 589 590# We trigger additional mismatches with less inlining 591ifdef CONFIG_DEBUG_SECTION_MISMATCH 592KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 593endif 594 595# arch Makefile may override CC so keep this after arch Makefile is included 596NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 597CHECKFLAGS += $(NOSTDINC_FLAGS) 598 599# warn about C99 declaration after statement 600KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 601 602# disable pointer signed / unsigned warnings in gcc 4.0 603KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 604 605# disable invalid "can't wrap" optimizations for signed / pointers 606KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 607 608# conserve stack if available 609KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 610 611# check for 'asm goto' 612ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 613 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 614endif 615 616# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 617# But warn user when we do so 618warn-assign = \ 619$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 620 621ifneq ($(KCPPFLAGS),) 622 $(call warn-assign,CPPFLAGS) 623 KBUILD_CPPFLAGS += $(KCPPFLAGS) 624endif 625ifneq ($(KAFLAGS),) 626 $(call warn-assign,AFLAGS) 627 KBUILD_AFLAGS += $(KAFLAGS) 628endif 629ifneq ($(KCFLAGS),) 630 $(call warn-assign,CFLAGS) 631 KBUILD_CFLAGS += $(KCFLAGS) 632endif 633 634# Use --build-id when available. 635LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 636 $(call cc-ldoption, -Wl$(comma)--build-id,)) 637KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 638LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 639 640ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 641LDFLAGS_vmlinux += $(call ld-option, -X,) 642endif 643 644# Default kernel image to build when no specific target is given. 645# KBUILD_IMAGE may be overruled on the command line or 646# set in the environment 647# Also any assignments in arch/$(ARCH)/Makefile take precedence over 648# this default value 649export KBUILD_IMAGE ?= vmlinux 650 651# 652# INSTALL_PATH specifies where to place the updated kernel and system map 653# images. Default is /boot, but you can set it to other values 654export INSTALL_PATH ?= /boot 655 656# 657# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 658# relocations required by build roots. This is not defined in the 659# makefile but the argument can be passed to make if needed. 660# 661 662MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 663export MODLIB 664 665# 666# INSTALL_MOD_STRIP, if defined, will cause modules to be 667# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 668# the default option --strip-debug will be used. Otherwise, 669# INSTALL_MOD_STRIP will used as the options to the strip command. 670 671ifdef INSTALL_MOD_STRIP 672ifeq ($(INSTALL_MOD_STRIP),1) 673mod_strip_cmd = $(STRIP) --strip-debug 674else 675mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 676endif # INSTALL_MOD_STRIP=1 677else 678mod_strip_cmd = true 679endif # INSTALL_MOD_STRIP 680export mod_strip_cmd 681 682 683ifeq ($(KBUILD_EXTMOD),) 684core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 685 686vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 687 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 688 $(net-y) $(net-m) $(libs-y) $(libs-m))) 689 690vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 691 $(init-n) $(init-) \ 692 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 693 $(net-n) $(net-) $(libs-n) $(libs-)))) 694 695init-y := $(patsubst %/, %/built-in.o, $(init-y)) 696core-y := $(patsubst %/, %/built-in.o, $(core-y)) 697drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 698net-y := $(patsubst %/, %/built-in.o, $(net-y)) 699libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 700libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 701libs-y := $(libs-y1) $(libs-y2) 702 703# Build vmlinux 704# --------------------------------------------------------------------------- 705# vmlinux is built from the objects selected by $(vmlinux-init) and 706# $(vmlinux-main). Most are built-in.o files from top-level directories 707# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 708# Ordering when linking is important, and $(vmlinux-init) must be first. 709# 710# vmlinux 711# ^ 712# | 713# +-< $(vmlinux-init) 714# | +--< init/version.o + more 715# | 716# +--< $(vmlinux-main) 717# | +--< driver/built-in.o mm/built-in.o + more 718# | 719# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 720# 721# vmlinux version (uname -v) cannot be updated during normal 722# descending-into-subdirs phase since we do not yet know if we need to 723# update vmlinux. 724# Therefore this step is delayed until just before final link of vmlinux - 725# except in the kallsyms case where it is done just before adding the 726# symbols to the kernel. 727# 728# System.map is generated to document addresses of all kernel symbols 729 730vmlinux-init := $(head-y) $(init-y) 731vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 732vmlinux-all := $(vmlinux-init) $(vmlinux-main) 733vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 734export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 735 736# Rule to link vmlinux - also used during CONFIG_KALLSYMS 737# May be overridden by arch/$(ARCH)/Makefile 738quiet_cmd_vmlinux__ ?= LD $@ 739 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 740 -T $(vmlinux-lds) $(vmlinux-init) \ 741 --start-group $(vmlinux-main) --end-group \ 742 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 743 744# Generate new vmlinux version 745quiet_cmd_vmlinux_version = GEN .version 746 cmd_vmlinux_version = set -e; \ 747 if [ ! -r .version ]; then \ 748 rm -f .version; \ 749 echo 1 >.version; \ 750 else \ 751 mv .version .old_version; \ 752 expr 0$$(cat .old_version) + 1 >.version; \ 753 fi; \ 754 $(MAKE) $(build)=init 755 756# Generate System.map 757quiet_cmd_sysmap = SYSMAP 758 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 759 760# Link of vmlinux 761# If CONFIG_KALLSYMS is set .version is already updated 762# Generate System.map and verify that the content is consistent 763# Use + in front of the vmlinux_version rule to silent warning with make -j2 764# First command is ':' to allow us to use + in front of the rule 765define rule_vmlinux__ 766 : 767 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 768 769 $(call cmd,vmlinux__) 770 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 771 772 $(Q)$(if $($(quiet)cmd_sysmap), \ 773 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 774 $(cmd_sysmap) $@ System.map; \ 775 if [ $$? -ne 0 ]; then \ 776 rm -f $@; \ 777 /bin/false; \ 778 fi; 779 $(verify_kallsyms) 780endef 781 782 783ifdef CONFIG_KALLSYMS 784# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 785# It's a three stage process: 786# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 787# empty 788# Running kallsyms on that gives us .tmp_kallsyms1.o with 789# the right size - vmlinux version (uname -v) is updated during this step 790# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 791# but due to the added section, some addresses have shifted. 792# From here, we generate a correct .tmp_kallsyms2.o 793# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 794# o Verify that the System.map from vmlinux matches the map from 795# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 796# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 797# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 798# temporary bypass to allow the kernel to be built while the 799# maintainers work out what went wrong with kallsyms. 800 801ifdef CONFIG_KALLSYMS_EXTRA_PASS 802last_kallsyms := 3 803else 804last_kallsyms := 2 805endif 806 807kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 808 809define verify_kallsyms 810 $(Q)$(if $($(quiet)cmd_sysmap), \ 811 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 812 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 813 $(Q)cmp -s System.map .tmp_System.map || \ 814 (echo Inconsistent kallsyms data; \ 815 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 816 rm .tmp_kallsyms* ; /bin/false ) 817endef 818 819# Update vmlinux version before link 820# Use + in front of this rule to silent warning about make -j1 821# First command is ':' to allow us to use + in front of this rule 822cmd_ksym_ld = $(cmd_vmlinux__) 823define rule_ksym_ld 824 : 825 +$(call cmd,vmlinux_version) 826 $(call cmd,vmlinux__) 827 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 828endef 829 830# Generate .S file with all kernel symbols 831quiet_cmd_kallsyms = KSYM $@ 832 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 833 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 834 835.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 836 $(call if_changed_dep,as_o_S) 837 838.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 839 $(call cmd,kallsyms) 840 841# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 842.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 843 $(call if_changed_rule,ksym_ld) 844 845.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 846 $(call if_changed,vmlinux__) 847 848.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 849 $(call if_changed,vmlinux__) 850 851# Needs to visit scripts/ before $(KALLSYMS) can be used. 852$(KALLSYMS): scripts ; 853 854# Generate some data for debugging strange kallsyms problems 855debug_kallsyms: .tmp_map$(last_kallsyms) 856 857.tmp_map%: .tmp_vmlinux% FORCE 858 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 859 860.tmp_map3: .tmp_map2 861 862.tmp_map2: .tmp_map1 863 864endif # ifdef CONFIG_KALLSYMS 865 866# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 867# relevant sections renamed as per the linker script. 868quiet_cmd_vmlinux-modpost = LD $@ 869 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 870 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 871 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 872define rule_vmlinux-modpost 873 : 874 +$(call cmd,vmlinux-modpost) 875 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 876 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 877endef 878 879# vmlinux image - including updated kernel symbols 880vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 881ifdef CONFIG_HEADERS_CHECK 882 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 883endif 884ifdef CONFIG_SAMPLES 885 $(Q)$(MAKE) $(build)=samples 886endif 887ifdef CONFIG_BUILD_DOCSRC 888 $(Q)$(MAKE) $(build)=Documentation 889endif 890 $(call vmlinux-modpost) 891 $(call if_changed_rule,vmlinux__) 892 $(Q)rm -f .old_version 893 894# build vmlinux.o first to catch section mismatch errors early 895ifdef CONFIG_KALLSYMS 896.tmp_vmlinux1: vmlinux.o 897endif 898 899modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 900vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 901 $(call if_changed_rule,vmlinux-modpost) 902 903# The actual objects are generated when descending, 904# make sure no implicit rule kicks in 905$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 906 907# Handle descending into subdirectories listed in $(vmlinux-dirs) 908# Preset locale variables to speed up the build process. Limit locale 909# tweaks to this spot to avoid wrong language settings when running 910# make menuconfig etc. 911# Error messages still appears in the original language 912 913PHONY += $(vmlinux-dirs) 914$(vmlinux-dirs): prepare scripts 915 $(Q)$(MAKE) $(build)=$@ 916 917# Store (new) KERNELRELASE string in include/config/kernel.release 918include/config/kernel.release: include/config/auto.conf FORCE 919 $(Q)rm -f $@ 920 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 921 922 923# Things we need to do before we recursively start building the kernel 924# or the modules are listed in "prepare". 925# A multi level approach is used. prepareN is processed before prepareN-1. 926# archprepare is used in arch Makefiles and when processed asm symlink, 927# version.h and scripts_basic is processed / created. 928 929# Listed in dependency order 930PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 931 932# prepare3 is used to check if we are building in a separate output directory, 933# and if so do: 934# 1) Check that make has not been executed in the kernel src $(srctree) 935prepare3: include/config/kernel.release 936ifneq ($(KBUILD_SRC),) 937 @$(kecho) ' Using $(srctree) as source for kernel' 938 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 939 echo " $(srctree) is not clean, please run 'make mrproper'";\ 940 echo " in the '$(srctree)' directory.";\ 941 /bin/false; \ 942 fi; 943endif 944 945# prepare2 creates a makefile if using a separate output directory 946prepare2: prepare3 outputmakefile 947 948prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 949 include/config/auto.conf 950 $(cmd_crmodverdir) 951 952archprepare: prepare1 scripts_basic 953 954prepare0: archprepare FORCE 955 $(Q)$(MAKE) $(build)=. 956 $(Q)$(MAKE) $(build)=. missing-syscalls 957 958# All the preparing.. 959prepare: prepare0 960 961# Generate some files 962# --------------------------------------------------------------------------- 963 964# KERNELRELEASE can change from a few different places, meaning version.h 965# needs to be updated, so this check is forced on all builds 966 967uts_len := 64 968define filechk_utsrelease.h 969 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 970 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 971 exit 1; \ 972 fi; \ 973 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 974endef 975 976define filechk_version.h 977 (echo \#define LINUX_VERSION_CODE $(shell \ 978 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 979 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 980endef 981 982include/linux/version.h: $(srctree)/Makefile FORCE 983 $(call filechk,version.h) 984 985include/generated/utsrelease.h: include/config/kernel.release FORCE 986 $(call filechk,utsrelease.h) 987 988PHONY += headerdep 989headerdep: 990 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 991 992# --------------------------------------------------------------------------- 993 994PHONY += depend dep 995depend dep: 996 @echo '*** Warning: make $@ is unnecessary now.' 997 998# --------------------------------------------------------------------------- 999# Firmware install 1000INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1001export INSTALL_FW_PATH 1002 1003PHONY += firmware_install 1004firmware_install: FORCE 1005 @mkdir -p $(objtree)/firmware 1006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1007 1008# --------------------------------------------------------------------------- 1009# Kernel headers 1010 1011#Default location for installed headers 1012export INSTALL_HDR_PATH = $(objtree)/usr 1013 1014hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1015 1016# If we do an all arch process set dst to asm-$(hdr-arch) 1017hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1018 1019PHONY += __headers 1020__headers: include/linux/version.h scripts_basic FORCE 1021 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1022 1023PHONY += headers_install_all 1024headers_install_all: 1025 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1026 1027PHONY += headers_install 1028headers_install: __headers 1029 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1030 $(error Headers not exportable for the $(SRCARCH) architecture)) 1031 $(Q)$(MAKE) $(hdr-inst)=include 1032 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1033 1034PHONY += headers_check_all 1035headers_check_all: headers_install_all 1036 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1037 1038PHONY += headers_check 1039headers_check: headers_install 1040 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1041 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1042 1043# --------------------------------------------------------------------------- 1044# Modules 1045 1046ifdef CONFIG_MODULES 1047 1048# By default, build modules as well 1049 1050all: modules 1051 1052# Build modules 1053# 1054# A module can be listed more than once in obj-m resulting in 1055# duplicate lines in modules.order files. Those are removed 1056# using awk while concatenating to the final file. 1057 1058PHONY += modules 1059modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1060 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1061 @$(kecho) ' Building modules, stage 2.'; 1062 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1063 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1064 1065modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1066 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1067 1068%/modules.builtin: include/config/auto.conf 1069 $(Q)$(MAKE) $(modbuiltin)=$* 1070 1071 1072# Target to prepare building external modules 1073PHONY += modules_prepare 1074modules_prepare: prepare scripts 1075 1076# Target to install modules 1077PHONY += modules_install 1078modules_install: _modinst_ _modinst_post 1079 1080PHONY += _modinst_ 1081_modinst_: 1082 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1083 echo "Warning: you may need to install module-init-tools"; \ 1084 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1085 sleep 1; \ 1086 fi 1087 @rm -rf $(MODLIB)/kernel 1088 @rm -f $(MODLIB)/source 1089 @mkdir -p $(MODLIB)/kernel 1090 @ln -s $(srctree) $(MODLIB)/source 1091 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1092 rm -f $(MODLIB)/build ; \ 1093 ln -s $(objtree) $(MODLIB)/build ; \ 1094 fi 1095 @cp -f $(objtree)/modules.order $(MODLIB)/ 1096 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1097 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1098 1099# This depmod is only for convenience to give the initial 1100# boot a modules.dep even before / is mounted read-write. However the 1101# boot script depmod is the master version. 1102PHONY += _modinst_post 1103_modinst_post: _modinst_ 1104 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1105 $(call cmd,depmod) 1106 1107else # CONFIG_MODULES 1108 1109# Modules not configured 1110# --------------------------------------------------------------------------- 1111 1112modules modules_install: FORCE 1113 @echo 1114 @echo "The present kernel configuration has modules disabled." 1115 @echo "Type 'make config' and enable loadable module support." 1116 @echo "Then build a kernel with module support enabled." 1117 @echo 1118 @exit 1 1119 1120endif # CONFIG_MODULES 1121 1122### 1123# Cleaning is done on three levels. 1124# make clean Delete most generated files 1125# Leave enough to build external modules 1126# make mrproper Delete the current configuration, and all generated files 1127# make distclean Remove editor backup files, patch leftover files and the like 1128 1129# Directories & files removed with 'make clean' 1130CLEAN_DIRS += $(MODVERDIR) 1131CLEAN_FILES += vmlinux System.map \ 1132 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1133 1134# Directories & files removed with 'make mrproper' 1135MRPROPER_DIRS += include/config usr/include include/generated 1136MRPROPER_FILES += .config .config.old .version .old_version \ 1137 include/linux/version.h \ 1138 Module.symvers tags TAGS cscope* 1139 1140# clean - Delete most, but leave enough to build external modules 1141# 1142clean: rm-dirs := $(CLEAN_DIRS) 1143clean: rm-files := $(CLEAN_FILES) 1144clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation) 1145 1146PHONY += $(clean-dirs) clean archclean 1147$(clean-dirs): 1148 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1149 1150clean: archclean 1151 1152# mrproper - Delete all generated files, including .config 1153# 1154mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1155mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1156mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1157 1158PHONY += $(mrproper-dirs) mrproper archmrproper 1159$(mrproper-dirs): 1160 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1161 1162mrproper: clean archmrproper $(mrproper-dirs) 1163 $(call cmd,rmdirs) 1164 $(call cmd,rmfiles) 1165 1166# distclean 1167# 1168PHONY += distclean 1169 1170distclean: mrproper 1171 @find $(srctree) $(RCS_FIND_IGNORE) \ 1172 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1173 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1174 -o -name '.*.rej' -o -size 0 \ 1175 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1176 -type f -print | xargs rm -f 1177 1178 1179# Packaging of the kernel to various formats 1180# --------------------------------------------------------------------------- 1181# rpm target kept for backward compatibility 1182package-dir := $(srctree)/scripts/package 1183 1184%src-pkg: FORCE 1185 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1186%pkg: include/config/kernel.release FORCE 1187 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1188rpm: include/config/kernel.release FORCE 1189 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1190 1191 1192# Brief documentation of the typical targets used 1193# --------------------------------------------------------------------------- 1194 1195boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1196boards := $(notdir $(boards)) 1197board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1198board-dirs := $(sort $(notdir $(board-dirs:/=))) 1199 1200help: 1201 @echo 'Cleaning targets:' 1202 @echo ' clean - Remove most generated files but keep the config and' 1203 @echo ' enough build support to build external modules' 1204 @echo ' mrproper - Remove all generated files + config + various backup files' 1205 @echo ' distclean - mrproper + remove editor backup and patch files' 1206 @echo '' 1207 @echo 'Configuration targets:' 1208 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1209 @echo '' 1210 @echo 'Other generic targets:' 1211 @echo ' all - Build all targets marked with [*]' 1212 @echo '* vmlinux - Build the bare kernel' 1213 @echo '* modules - Build all modules' 1214 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1215 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1216 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1217 @echo ' dir/ - Build all files in dir and below' 1218 @echo ' dir/file.[oisS] - Build specified target only' 1219 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1220 @echo ' (requires a recent binutils and recent build (System.map))' 1221 @echo ' dir/file.ko - Build module including final link' 1222 @echo ' modules_prepare - Set up for building external modules' 1223 @echo ' tags/TAGS - Generate tags file for editors' 1224 @echo ' cscope - Generate cscope index' 1225 @echo ' kernelrelease - Output the release version string' 1226 @echo ' kernelversion - Output the version stored in Makefile' 1227 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1228 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1229 echo '' 1230 @echo 'Static analysers' 1231 @echo ' checkstack - Generate a list of stack hogs' 1232 @echo ' namespacecheck - Name space analysis on compiled kernel' 1233 @echo ' versioncheck - Sanity check on version.h usage' 1234 @echo ' includecheck - Check for duplicate included header files' 1235 @echo ' export_report - List the usages of all exported symbols' 1236 @echo ' headers_check - Sanity check on exported headers' 1237 @echo ' headerdep - Detect inclusion cycles in headers' 1238 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1239 @echo '' 1240 @echo 'Kernel packaging:' 1241 @$(MAKE) $(build)=$(package-dir) help 1242 @echo '' 1243 @echo 'Documentation targets:' 1244 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1245 @echo '' 1246 @echo 'Architecture specific targets ($(SRCARCH)):' 1247 @$(if $(archhelp),$(archhelp),\ 1248 echo ' No architecture specific help defined for $(SRCARCH)') 1249 @echo '' 1250 @$(if $(boards), \ 1251 $(foreach b, $(boards), \ 1252 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1253 echo '') 1254 @$(if $(board-dirs), \ 1255 $(foreach b, $(board-dirs), \ 1256 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1257 printf " %-16s - Show all of the above\\n" help-boards; \ 1258 echo '') 1259 1260 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1261 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1262 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1263 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1264 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1265 @echo '' 1266 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1267 @echo 'For further info see the ./README file' 1268 1269 1270help-board-dirs := $(addprefix help-,$(board-dirs)) 1271 1272help-boards: $(help-board-dirs) 1273 1274boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1275 1276$(help-board-dirs): help-%: 1277 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1278 @$(if $(boards-per-dir), \ 1279 $(foreach b, $(boards-per-dir), \ 1280 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1281 echo '') 1282 1283 1284# Documentation targets 1285# --------------------------------------------------------------------------- 1286%docs: scripts_basic FORCE 1287 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1288 1289else # KBUILD_EXTMOD 1290 1291### 1292# External module support. 1293# When building external modules the kernel used as basis is considered 1294# read-only, and no consistency checks are made and the make 1295# system is not used on the basis kernel. If updates are required 1296# in the basis kernel ordinary make commands (without M=...) must 1297# be used. 1298# 1299# The following are the only valid targets when building external 1300# modules. 1301# make M=dir clean Delete all automatically generated files 1302# make M=dir modules Make all modules in specified dir 1303# make M=dir Same as 'make M=dir modules' 1304# make M=dir modules_install 1305# Install the modules built in the module directory 1306# Assumes install directory is already created 1307 1308# We are always building modules 1309KBUILD_MODULES := 1 1310PHONY += crmodverdir 1311crmodverdir: 1312 $(cmd_crmodverdir) 1313 1314PHONY += $(objtree)/Module.symvers 1315$(objtree)/Module.symvers: 1316 @test -e $(objtree)/Module.symvers || ( \ 1317 echo; \ 1318 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1319 echo " is missing; modules will have no dependencies and modversions."; \ 1320 echo ) 1321 1322module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1323PHONY += $(module-dirs) modules 1324$(module-dirs): crmodverdir $(objtree)/Module.symvers 1325 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1326 1327modules: $(module-dirs) 1328 @$(kecho) ' Building modules, stage 2.'; 1329 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1330 1331PHONY += modules_install 1332modules_install: _emodinst_ _emodinst_post 1333 1334install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1335PHONY += _emodinst_ 1336_emodinst_: 1337 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1338 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1339 1340PHONY += _emodinst_post 1341_emodinst_post: _emodinst_ 1342 $(call cmd,depmod) 1343 1344clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1345 1346PHONY += $(clean-dirs) clean 1347$(clean-dirs): 1348 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1349 1350clean: rm-dirs := $(MODVERDIR) 1351clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1352 1353help: 1354 @echo ' Building external modules.' 1355 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1356 @echo '' 1357 @echo ' modules - default target, build the module(s)' 1358 @echo ' modules_install - install the module' 1359 @echo ' clean - remove generated files in module directory only' 1360 @echo '' 1361 1362# Dummies... 1363PHONY += prepare scripts 1364prepare: ; 1365scripts: ; 1366endif # KBUILD_EXTMOD 1367 1368clean: $(clean-dirs) 1369 $(call cmd,rmdirs) 1370 $(call cmd,rmfiles) 1371 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1372 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1373 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1374 -o -name '*.symtypes' -o -name 'modules.order' \ 1375 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1376 -o -name '*.gcno' \) -type f -print | xargs rm -f 1377 1378# Generate tags for editors 1379# --------------------------------------------------------------------------- 1380quiet_cmd_tags = GEN $@ 1381 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1382 1383tags TAGS cscope: FORCE 1384 $(call cmd,tags) 1385 1386# Scripts to check various things for consistency 1387# --------------------------------------------------------------------------- 1388 1389includecheck: 1390 find * $(RCS_FIND_IGNORE) \ 1391 -name '*.[hcS]' -type f -print | sort \ 1392 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1393 1394versioncheck: 1395 find * $(RCS_FIND_IGNORE) \ 1396 -name '*.[hcS]' -type f -print | sort \ 1397 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1398 1399coccicheck: 1400 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1401 1402namespacecheck: 1403 $(PERL) $(srctree)/scripts/namespace.pl 1404 1405export_report: 1406 $(PERL) $(srctree)/scripts/export_report.pl 1407 1408endif #ifeq ($(config-targets),1) 1409endif #ifeq ($(mixed-targets),1) 1410 1411PHONY += checkstack kernelrelease kernelversion 1412 1413# UML needs a little special treatment here. It wants to use the host 1414# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1415# else wants $(ARCH), including people doing cross-builds, which means 1416# that $(SUBARCH) doesn't work here. 1417ifeq ($(ARCH), um) 1418CHECKSTACK_ARCH := $(SUBARCH) 1419else 1420CHECKSTACK_ARCH := $(ARCH) 1421endif 1422checkstack: 1423 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1424 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1425 1426kernelrelease: 1427 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1428 1429kernelversion: 1430 @echo $(KERNELVERSION) 1431 1432# Single targets 1433# --------------------------------------------------------------------------- 1434# Single targets are compatible with: 1435# - build with mixed source and output 1436# - build with separate output dir 'make O=...' 1437# - external modules 1438# 1439# target-dir => where to store outputfile 1440# build-dir => directory in kernel source tree to use 1441 1442ifeq ($(KBUILD_EXTMOD),) 1443 build-dir = $(patsubst %/,%,$(dir $@)) 1444 target-dir = $(dir $@) 1445else 1446 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1447 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1448 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1449endif 1450 1451%.s: %.c prepare scripts FORCE 1452 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1453%.i: %.c prepare scripts FORCE 1454 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1455%.o: %.c prepare scripts FORCE 1456 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1457%.lst: %.c prepare scripts FORCE 1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1459%.s: %.S prepare scripts FORCE 1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1461%.o: %.S prepare scripts FORCE 1462 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1463%.symtypes: %.c prepare scripts FORCE 1464 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1465 1466# Modules 1467/: prepare scripts FORCE 1468 $(cmd_crmodverdir) 1469 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1470 $(build)=$(build-dir) 1471%/: prepare scripts FORCE 1472 $(cmd_crmodverdir) 1473 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1474 $(build)=$(build-dir) 1475%.ko: prepare scripts FORCE 1476 $(cmd_crmodverdir) 1477 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1478 $(build)=$(build-dir) $(@:.ko=.o) 1479 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1480 1481# FIXME Should go into a make.lib or something 1482# =========================================================================== 1483 1484quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1485 cmd_rmdirs = rm -rf $(rm-dirs) 1486 1487quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1488 cmd_rmfiles = rm -f $(rm-files) 1489 1490# Run depmod only if we have System.map and depmod is executable 1491quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1492 cmd_depmod = \ 1493 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1494 $(DEPMOD) -ae -F System.map \ 1495 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1496 $(KERNELRELEASE); \ 1497 fi 1498 1499# Create temporary dir for module support files 1500# clean it up only when building all modules 1501cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1502 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1503 1504a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1505 $(KBUILD_AFLAGS_KERNEL) \ 1506 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1507 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1508 1509quiet_cmd_as_o_S = AS $@ 1510cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1511 1512# read all saved command lines 1513 1514targets := $(wildcard $(sort $(targets))) 1515cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1516 1517ifneq ($(cmd_files),) 1518 $(cmd_files): ; # Do not try to update included dependency files 1519 include $(cmd_files) 1520endif 1521 1522# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1523# Usage: 1524# $(Q)$(MAKE) $(clean)=dir 1525clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1526 1527endif # skip-makefile 1528 1529PHONY += FORCE 1530FORCE: 1531 1532# Declare the contents of the .PHONY variable as phony. We keep that 1533# information in a variable so we can use it in if_changed and friends. 1534.PHONY: $(PHONY) 1535