1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 27 4EXTRAVERSION = .59 5NAME = Trembling Tortoise 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# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(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? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111# Cancel implicit rules on top Makefile 112$(CURDIR)/Makefile Makefile: ; 113 114ifneq ($(KBUILD_OUTPUT),) 115# Invoke a second make in the output directory, passing relevant variables 116# check that the output directory actually exists 117saved-output := $(KBUILD_OUTPUT) 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 119$(if $(KBUILD_OUTPUT),, \ 120 $(error output directory "$(saved-output)" does not exist)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(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.*/sh/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192export KBUILD_BUILDHOST := $(SUBARCH) 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198SRCARCH := $(ARCH) 199 200# Additional ARCH settings for x86 201ifeq ($(ARCH),i386) 202 SRCARCH := x86 203endif 204ifeq ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208# Where to locate arch specific headers 209ifeq ($(ARCH),sparc64) 210 hdr-arch := sparc 211else 212 hdr-arch := $(SRCARCH) 213endif 214 215KCONFIG_CONFIG ?= .config 216 217# SHELL used by kbuild 218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 219 else if [ -x /bin/bash ]; then echo /bin/bash; \ 220 else echo sh; fi ; fi) 221 222HOSTCC = gcc 223HOSTCXX = g++ 224HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 225HOSTCXXFLAGS = -O2 226 227# Decide whether to build built-in, modular, or both. 228# Normally, just do built-in. 229 230KBUILD_MODULES := 231KBUILD_BUILTIN := 1 232 233# If we have only "make modules", don't compile built-in objects. 234# When we're building modules with modversions, we need to consider 235# the built-in objects during the descend as well, in order to 236# make sure the checksums are up to date before we record them. 237 238ifeq ($(MAKECMDGOALS),modules) 239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 240endif 241 242# If we have "make <whatever> modules", compile modules 243# in addition to whatever we do anyway. 244# Just "make" or "make all" shall build modules as well 245 246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 247 KBUILD_MODULES := 1 248endif 249 250ifeq ($(MAKECMDGOALS),) 251 KBUILD_MODULES := 1 252endif 253 254export KBUILD_MODULES KBUILD_BUILTIN 255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 256 257# Beautify output 258# --------------------------------------------------------------------------- 259# 260# Normally, we echo the whole command before executing it. By making 261# that echo $($(quiet)$(cmd)), we now have the possibility to set 262# $(quiet) to choose other forms of output instead, e.g. 263# 264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 266# 267# If $(quiet) is empty, the whole command will be printed. 268# If it is set to "quiet_", only the short version will be printed. 269# If it is set to "silent_", nothing will be printed at all, since 270# the variable $(silent_cmd_cc_o_c) doesn't exist. 271# 272# A simple variant is to prefix commands with $(Q) - that's useful 273# for commands that shall be hidden in non-verbose mode. 274# 275# $(Q)ln $@ :< 276# 277# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 278# If KBUILD_VERBOSE equals 1 then the above command is displayed. 279 280ifeq ($(KBUILD_VERBOSE),1) 281 quiet = 282 Q = 283else 284 quiet=quiet_ 285 Q = @ 286endif 287 288# If the user is running make -s (silent mode), suppress echoing of 289# commands 290 291ifneq ($(findstring s,$(MAKEFLAGS)),) 292 quiet=silent_ 293endif 294 295export quiet Q KBUILD_VERBOSE 296 297 298# Look for make include files relative to root of kernel src 299MAKEFLAGS += --include-dir=$(srctree) 300 301# We need some generic definitions (do not try to remake the file). 302$(srctree)/scripts/Kbuild.include: ; 303include $(srctree)/scripts/Kbuild.include 304 305# Make variables (CC, etc...) 306 307AS = $(CROSS_COMPILE)as 308LD = $(CROSS_COMPILE)ld 309CC = $(CROSS_COMPILE)gcc 310CPP = $(CC) -E 311AR = $(CROSS_COMPILE)ar 312NM = $(CROSS_COMPILE)nm 313STRIP = $(CROSS_COMPILE)strip 314OBJCOPY = $(CROSS_COMPILE)objcopy 315OBJDUMP = $(CROSS_COMPILE)objdump 316AWK = awk 317GENKSYMS = scripts/genksyms/genksyms 318DEPMOD = /sbin/depmod 319KALLSYMS = scripts/kallsyms 320PERL = perl 321CHECK = sparse 322 323CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 324MODFLAGS = -DMODULE 325CFLAGS_MODULE = $(MODFLAGS) 326AFLAGS_MODULE = $(MODFLAGS) 327LDFLAGS_MODULE = 328CFLAGS_KERNEL = 329AFLAGS_KERNEL = 330 331 332# Use LINUXINCLUDE when you must reference the include/ directory. 333# Needed to be compatible with the O= option 334LINUXINCLUDE := -Iinclude \ 335 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 336 -I$(srctree)/arch/$(hdr-arch)/include \ 337 -include include/linux/autoconf.h 338 339KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 340 341KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 342 -fno-strict-aliasing -fno-common \ 343 -Werror-implicit-function-declaration \ 344 -fno-delete-null-pointer-checks 345KBUILD_AFLAGS := -D__ASSEMBLY__ 346 347# Read KERNELRELEASE from include/config/kernel.release (if it exists) 348KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 349KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 350 351export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 352export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 353export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 354export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 355 356export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 357export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 358export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 359 360# When compiling out-of-tree modules, put MODVERDIR in the module 361# tree rather than in the kernel tree. The kernel tree might 362# even be read-only. 363export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 364 365# Files to ignore in find ... statements 366 367RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 368export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 369 370# =========================================================================== 371# Rules shared between *config targets and build targets 372 373# Basic helpers built in scripts/ 374PHONY += scripts_basic 375scripts_basic: 376 $(Q)$(MAKE) $(build)=scripts/basic 377 378# To avoid any implicit rule to kick in, define an empty command. 379scripts/basic/%: scripts_basic ; 380 381PHONY += outputmakefile 382# outputmakefile generates a Makefile in the output directory, if using a 383# separate output directory. This allows convenient use of make in the 384# output directory. 385outputmakefile: 386ifneq ($(KBUILD_SRC),) 387 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 388 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 389endif 390 391# To make sure we do not include .config for any of the *config targets 392# catch them early, and hand them over to scripts/kconfig/Makefile 393# It is allowed to specify more targets when calling make, including 394# mixing *config targets and build targets. 395# For example 'make oldconfig all'. 396# Detect when mixed targets is specified, and make a second invocation 397# of make so .config is not included in this case either (for *config). 398 399no-dot-config-targets := clean mrproper distclean \ 400 cscope TAGS tags help %docs check% \ 401 include/linux/version.h headers_% \ 402 kernelrelease kernelversion 403 404config-targets := 0 405mixed-targets := 0 406dot-config := 1 407 408ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 409 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 410 dot-config := 0 411 endif 412endif 413 414ifeq ($(KBUILD_EXTMOD),) 415 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 416 config-targets := 1 417 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 418 mixed-targets := 1 419 endif 420 endif 421endif 422 423ifeq ($(mixed-targets),1) 424# =========================================================================== 425# We're called with mixed targets (*config and build targets). 426# Handle them one by one. 427 428%:: FORCE 429 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 430 431else 432ifeq ($(config-targets),1) 433# =========================================================================== 434# *config targets only - make sure prerequisites are updated, and descend 435# in scripts/kconfig to make the *config target 436 437# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 438# KBUILD_DEFCONFIG may point out an alternative default configuration 439# used for 'make defconfig' 440include $(srctree)/arch/$(SRCARCH)/Makefile 441export KBUILD_DEFCONFIG 442 443config: scripts_basic outputmakefile FORCE 444 $(Q)mkdir -p include/linux include/config 445 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 446 447%config: scripts_basic outputmakefile FORCE 448 $(Q)mkdir -p include/linux include/config 449 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 450 451else 452# =========================================================================== 453# Build targets only - this includes vmlinux, arch specific targets, clean 454# targets and others. In general all targets except *config targets. 455 456ifeq ($(KBUILD_EXTMOD),) 457# Additional helpers built in scripts/ 458# Carefully list dependencies so we do not try to build scripts twice 459# in parallel 460PHONY += scripts 461scripts: scripts_basic include/config/auto.conf 462 $(Q)$(MAKE) $(build)=$(@) 463 464# Objects we will link into vmlinux / subdirs we need to visit 465init-y := init/ 466drivers-y := drivers/ sound/ firmware/ 467net-y := net/ 468libs-y := lib/ 469core-y := usr/ 470endif # KBUILD_EXTMOD 471 472ifeq ($(dot-config),1) 473# Read in config 474-include include/config/auto.conf 475 476ifeq ($(KBUILD_EXTMOD),) 477# Read in dependencies to all Kconfig* files, make sure to run 478# oldconfig if changes are detected. 479-include include/config/auto.conf.cmd 480 481# To avoid any implicit rule to kick in, define an empty command 482$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 483 484# If .config is newer than include/config/auto.conf, someone tinkered 485# with it and forgot to run make oldconfig. 486# if auto.conf.cmd is missing then we are probably in a cleaned tree so 487# we execute the config step to be sure to catch updated Kconfig files 488include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 489 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 490else 491# external modules needs include/linux/autoconf.h and include/config/auto.conf 492# but do not care if they are up-to-date. Use auto.conf to trigger the test 493PHONY += include/config/auto.conf 494 495include/config/auto.conf: 496 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 497 echo; \ 498 echo " ERROR: Kernel configuration is invalid."; \ 499 echo " include/linux/autoconf.h or $@ are missing."; \ 500 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 501 echo; \ 502 /bin/false) 503 504endif # KBUILD_EXTMOD 505 506else 507# Dummy target needed, because used as prerequisite 508include/config/auto.conf: ; 509endif # $(dot-config) 510 511# The all: target is the default when no target is given on the 512# command line. 513# This allow a user to issue only 'make' to build a kernel including modules 514# Defaults vmlinux but it is usually overridden in the arch makefile 515all: vmlinux 516 517ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 518KBUILD_CFLAGS += -Os 519else 520KBUILD_CFLAGS += -O2 521endif 522 523include $(srctree)/arch/$(SRCARCH)/Makefile 524 525ifneq (CONFIG_FRAME_WARN,0) 526KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 527endif 528 529# Force gcc to behave correct even for buggy distributions 530# Arch Makefiles may override this setting 531KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 532 533ifdef CONFIG_FRAME_POINTER 534KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 535else 536KBUILD_CFLAGS += -fomit-frame-pointer 537endif 538 539ifdef CONFIG_DEBUG_INFO 540KBUILD_CFLAGS += -g 541KBUILD_AFLAGS += -gdwarf-2 542endif 543 544ifdef CONFIG_FTRACE 545KBUILD_CFLAGS += -pg 546endif 547 548# We trigger additional mismatches with less inlining 549ifdef CONFIG_DEBUG_SECTION_MISMATCH 550KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 551endif 552 553# arch Makefile may override CC so keep this after arch Makefile is included 554NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 555CHECKFLAGS += $(NOSTDINC_FLAGS) 556 557# warn about C99 declaration after statement 558KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 559 560# disable pointer signed / unsigned warnings in gcc 4.0 561KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 562 563# disable invalid "can't wrap" optimzations for signed / pointers 564KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 565 566# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 567# But warn user when we do so 568warn-assign = \ 569$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 570 571ifneq ($(KCPPFLAGS),) 572 $(call warn-assign,CPPFLAGS) 573 KBUILD_CPPFLAGS += $(KCPPFLAGS) 574endif 575ifneq ($(KAFLAGS),) 576 $(call warn-assign,AFLAGS) 577 KBUILD_AFLAGS += $(KAFLAGS) 578endif 579ifneq ($(KCFLAGS),) 580 $(call warn-assign,CFLAGS) 581 KBUILD_CFLAGS += $(KCFLAGS) 582endif 583 584# Use --build-id when available. 585LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 586 $(call ld-option, -Wl$(comma)--build-id,)) 587LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 588LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 589 590# Default kernel image to build when no specific target is given. 591# KBUILD_IMAGE may be overruled on the command line or 592# set in the environment 593# Also any assignments in arch/$(ARCH)/Makefile take precedence over 594# this default value 595export KBUILD_IMAGE ?= vmlinux 596 597# 598# INSTALL_PATH specifies where to place the updated kernel and system map 599# images. Default is /boot, but you can set it to other values 600export INSTALL_PATH ?= /boot 601 602# 603# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 604# relocations required by build roots. This is not defined in the 605# makefile but the argument can be passed to make if needed. 606# 607 608MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 609export MODLIB 610 611# 612# INSTALL_MOD_STRIP, if defined, will cause modules to be 613# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 614# the default option --strip-debug will be used. Otherwise, 615# INSTALL_MOD_STRIP will used as the options to the strip command. 616 617ifdef INSTALL_MOD_STRIP 618ifeq ($(INSTALL_MOD_STRIP),1) 619mod_strip_cmd = $(STRIP) --strip-debug 620else 621mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 622endif # INSTALL_MOD_STRIP=1 623else 624mod_strip_cmd = true 625endif # INSTALL_MOD_STRIP 626export mod_strip_cmd 627 628 629ifeq ($(KBUILD_EXTMOD),) 630core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 631 632vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 633 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 634 $(net-y) $(net-m) $(libs-y) $(libs-m))) 635 636vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 637 $(init-n) $(init-) \ 638 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 639 $(net-n) $(net-) $(libs-n) $(libs-)))) 640 641init-y := $(patsubst %/, %/built-in.o, $(init-y)) 642core-y := $(patsubst %/, %/built-in.o, $(core-y)) 643drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 644net-y := $(patsubst %/, %/built-in.o, $(net-y)) 645libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 646libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 647libs-y := $(libs-y1) $(libs-y2) 648 649# Build vmlinux 650# --------------------------------------------------------------------------- 651# vmlinux is built from the objects selected by $(vmlinux-init) and 652# $(vmlinux-main). Most are built-in.o files from top-level directories 653# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 654# Ordering when linking is important, and $(vmlinux-init) must be first. 655# 656# vmlinux 657# ^ 658# | 659# +-< $(vmlinux-init) 660# | +--< init/version.o + more 661# | 662# +--< $(vmlinux-main) 663# | +--< driver/built-in.o mm/built-in.o + more 664# | 665# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 666# 667# vmlinux version (uname -v) cannot be updated during normal 668# descending-into-subdirs phase since we do not yet know if we need to 669# update vmlinux. 670# Therefore this step is delayed until just before final link of vmlinux - 671# except in the kallsyms case where it is done just before adding the 672# symbols to the kernel. 673# 674# System.map is generated to document addresses of all kernel symbols 675 676vmlinux-init := $(head-y) $(init-y) 677vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 678vmlinux-all := $(vmlinux-init) $(vmlinux-main) 679vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 680export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 681 682# Rule to link vmlinux - also used during CONFIG_KALLSYMS 683# May be overridden by arch/$(ARCH)/Makefile 684quiet_cmd_vmlinux__ ?= LD $@ 685 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 686 -T $(vmlinux-lds) $(vmlinux-init) \ 687 --start-group $(vmlinux-main) --end-group \ 688 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 689 690# Generate new vmlinux version 691quiet_cmd_vmlinux_version = GEN .version 692 cmd_vmlinux_version = set -e; \ 693 if [ ! -r .version ]; then \ 694 rm -f .version; \ 695 echo 1 >.version; \ 696 else \ 697 mv .version .old_version; \ 698 expr 0$$(cat .old_version) + 1 >.version; \ 699 fi; \ 700 $(MAKE) $(build)=init 701 702# Generate System.map 703quiet_cmd_sysmap = SYSMAP 704 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 705 706# Link of vmlinux 707# If CONFIG_KALLSYMS is set .version is already updated 708# Generate System.map and verify that the content is consistent 709# Use + in front of the vmlinux_version rule to silent warning with make -j2 710# First command is ':' to allow us to use + in front of the rule 711define rule_vmlinux__ 712 : 713 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 714 715 $(call cmd,vmlinux__) 716 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 717 718 $(Q)$(if $($(quiet)cmd_sysmap), \ 719 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 720 $(cmd_sysmap) $@ System.map; \ 721 if [ $$? -ne 0 ]; then \ 722 rm -f $@; \ 723 /bin/false; \ 724 fi; 725 $(verify_kallsyms) 726endef 727 728 729ifdef CONFIG_KALLSYMS 730# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 731# It's a three stage process: 732# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 733# empty 734# Running kallsyms on that gives us .tmp_kallsyms1.o with 735# the right size - vmlinux version (uname -v) is updated during this step 736# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 737# but due to the added section, some addresses have shifted. 738# From here, we generate a correct .tmp_kallsyms2.o 739# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 740# o Verify that the System.map from vmlinux matches the map from 741# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 742# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 743# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 744# temporary bypass to allow the kernel to be built while the 745# maintainers work out what went wrong with kallsyms. 746 747ifdef CONFIG_KALLSYMS_EXTRA_PASS 748last_kallsyms := 3 749else 750last_kallsyms := 2 751endif 752 753kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 754 755define verify_kallsyms 756 $(Q)$(if $($(quiet)cmd_sysmap), \ 757 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 758 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 759 $(Q)cmp -s System.map .tmp_System.map || \ 760 (echo Inconsistent kallsyms data; \ 761 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 762 rm .tmp_kallsyms* ; /bin/false ) 763endef 764 765# Update vmlinux version before link 766# Use + in front of this rule to silent warning about make -j1 767# First command is ':' to allow us to use + in front of this rule 768cmd_ksym_ld = $(cmd_vmlinux__) 769define rule_ksym_ld 770 : 771 +$(call cmd,vmlinux_version) 772 $(call cmd,vmlinux__) 773 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 774endef 775 776# Generate .S file with all kernel symbols 777quiet_cmd_kallsyms = KSYM $@ 778 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 779 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 780 781.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 782 $(call if_changed_dep,as_o_S) 783 784.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 785 $(call cmd,kallsyms) 786 787# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 788.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 789 $(call if_changed_rule,ksym_ld) 790 791.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 792 $(call if_changed,vmlinux__) 793 794.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 795 $(call if_changed,vmlinux__) 796 797# Needs to visit scripts/ before $(KALLSYMS) can be used. 798$(KALLSYMS): scripts ; 799 800# Generate some data for debugging strange kallsyms problems 801debug_kallsyms: .tmp_map$(last_kallsyms) 802 803.tmp_map%: .tmp_vmlinux% FORCE 804 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 805 806.tmp_map3: .tmp_map2 807 808.tmp_map2: .tmp_map1 809 810endif # ifdef CONFIG_KALLSYMS 811 812# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 813# relevant sections renamed as per the linker script. 814quiet_cmd_vmlinux-modpost = LD $@ 815 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 816 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 817 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 818define rule_vmlinux-modpost 819 : 820 +$(call cmd,vmlinux-modpost) 821 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 822 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 823endef 824 825# vmlinux image - including updated kernel symbols 826vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 827ifdef CONFIG_HEADERS_CHECK 828 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 829endif 830ifdef CONFIG_SAMPLES 831 $(Q)$(MAKE) $(build)=samples 832endif 833ifdef CONFIG_BUILD_DOCSRC 834 $(Q)$(MAKE) $(build)=Documentation 835endif 836 $(call vmlinux-modpost) 837 $(call if_changed_rule,vmlinux__) 838 $(Q)rm -f .old_version 839 840# build vmlinux.o first to catch section mismatch errors early 841ifdef CONFIG_KALLSYMS 842.tmp_vmlinux1: vmlinux.o 843endif 844 845modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 846vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 847 $(call if_changed_rule,vmlinux-modpost) 848 849# The actual objects are generated when descending, 850# make sure no implicit rule kicks in 851$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 852 853# Handle descending into subdirectories listed in $(vmlinux-dirs) 854# Preset locale variables to speed up the build process. Limit locale 855# tweaks to this spot to avoid wrong language settings when running 856# make menuconfig etc. 857# Error messages still appears in the original language 858 859PHONY += $(vmlinux-dirs) 860$(vmlinux-dirs): prepare scripts 861 $(Q)$(MAKE) $(build)=$@ 862 863# Build the kernel release string 864# 865# The KERNELRELEASE value built here is stored in the file 866# include/config/kernel.release, and is used when executing several 867# make targets, such as "make install" or "make modules_install." 868# 869# The eventual kernel release string consists of the following fields, 870# shown in a hierarchical format to show how smaller parts are concatenated 871# to form the larger and final value, with values coming from places like 872# the Makefile, kernel config options, make command line options and/or 873# SCM tag information. 874# 875# $(KERNELVERSION) 876# $(VERSION) eg, 2 877# $(PATCHLEVEL) eg, 6 878# $(SUBLEVEL) eg, 18 879# $(EXTRAVERSION) eg, -rc6 880# $(localver-full) 881# $(localver) 882# localversion* (files without backups, containing '~') 883# $(CONFIG_LOCALVERSION) (from kernel config setting) 884# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 885# ./scripts/setlocalversion (SCM tag, if one exists) 886# $(LOCALVERSION) (from make command line if provided) 887# 888# Note how the final $(localver-auto) string is included *only* if the 889# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 890# moment, only git is supported but other SCMs can edit the script 891# scripts/setlocalversion and add the appropriate checks as needed. 892 893pattern = ".*/localversion[^~]*" 894string = $(shell cat /dev/null \ 895 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 896 897localver = $(subst $(space),, $(string) \ 898 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 899 900# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 901# and if the SCM is know a tag from the SCM is appended. 902# The appended tag is determined by the SCM used. 903# 904# Currently, only git is supported. 905# Other SCMs can edit scripts/setlocalversion and add the appropriate 906# checks as needed. 907ifdef CONFIG_LOCALVERSION_AUTO 908 _localver-auto = $(shell $(CONFIG_SHELL) \ 909 $(srctree)/scripts/setlocalversion $(srctree)) 910 localver-auto = $(LOCALVERSION)$(_localver-auto) 911endif 912 913localver-full = $(localver)$(localver-auto) 914 915# Store (new) KERNELRELASE string in include/config/kernel.release 916kernelrelease = $(KERNELVERSION)$(localver-full) 917include/config/kernel.release: include/config/auto.conf FORCE 918 $(Q)rm -f $@ 919 $(Q)echo $(kernelrelease) > $@ 920 921 922# Things we need to do before we recursively start building the kernel 923# or the modules are listed in "prepare". 924# A multi level approach is used. prepareN is processed before prepareN-1. 925# archprepare is used in arch Makefiles and when processed asm symlink, 926# version.h and scripts_basic is processed / created. 927 928# Listed in dependency order 929PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 930 931# prepare3 is used to check if we are building in a separate output directory, 932# and if so do: 933# 1) Check that make has not been executed in the kernel src $(srctree) 934# 2) Create the include2 directory, used for the second asm symlink 935prepare3: include/config/kernel.release 936ifneq ($(KBUILD_SRC),) 937 @echo ' 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; 943 $(Q)if [ ! -d include2 ]; then \ 944 mkdir -p include2; \ 945 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 946 fi 947endif 948 949# prepare2 creates a makefile if using a separate output directory 950prepare2: prepare3 outputmakefile 951 952prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 953 include/asm include/config/auto.conf 954 $(cmd_crmodverdir) 955 956archprepare: prepare1 scripts_basic 957 958prepare0: archprepare FORCE 959 $(Q)$(MAKE) $(build)=. 960 $(Q)$(MAKE) $(build)=. missing-syscalls 961 962# All the preparing.. 963prepare: prepare0 964 965# Leave this as default for preprocessing vmlinux.lds.S, which is now 966# done in arch/$(ARCH)/kernel/Makefile 967 968export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 969 970# The asm symlink changes when $(ARCH) changes. 971# Detect this and ask user to run make mrproper 972define check-symlink 973 set -e; \ 974 if [ -L include/asm ]; then \ 975 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 976 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 977 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 978 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 979 exit 1; \ 980 fi; \ 981 fi 982endef 983 984# We create the target directory of the symlink if it does 985# not exist so the test in chack-symlink works and we have a 986# directory for generated filesas used by some architectures. 987define create-symlink 988 if [ ! -L include/asm ]; then \ 989 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 990 if [ ! -d include/asm-$(SRCARCH) ]; then \ 991 mkdir -p include/asm-$(SRCARCH); \ 992 fi; \ 993 ln -fsn asm-$(SRCARCH) $@; \ 994 fi 995endef 996 997include/asm: FORCE 998 $(Q)$(check-symlink) 999 $(Q)$(create-symlink) 1000
1001# Generate some files 1002# --------------------------------------------------------------------------- 1003 1004# KERNELRELEASE can change from a few different places, meaning version.h 1005# needs to be updated, so this check is forced on all builds 1006 1007uts_len := 64 1008define filechk_utsrelease.h 1009 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1010 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1011 exit 1; \ 1012 fi; \ 1013 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1014endef 1015 1016define filechk_version.h 1017 (echo \#define LINUX_VERSION_CODE $(shell \ 1018 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1019 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1020endef 1021 1022include/linux/version.h: $(srctree)/Makefile FORCE 1023 $(call filechk,version.h) 1024 1025include/linux/utsrelease.h: include/config/kernel.release FORCE 1026 $(call filechk,utsrelease.h) 1027 1028# --------------------------------------------------------------------------- 1029 1030PHONY += depend dep 1031depend dep: 1032 @echo '*** Warning: make $@ is unnecessary now.' 1033 1034# --------------------------------------------------------------------------- 1035# Firmware install 1036INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1037export INSTALL_FW_PATH 1038 1039PHONY += firmware_install 1040firmware_install: FORCE 1041 @mkdir -p $(objtree)/firmware 1042 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1043 1044# --------------------------------------------------------------------------- 1045# Kernel headers 1046 1047#Default location for installed headers 1048export INSTALL_HDR_PATH = $(objtree)/usr 1049 1050hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1051# Find out where the Kbuild file is located to support 1052# arch/$(ARCH)/include/asm 1053hdr-dir = $(strip \ 1054 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1055 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1056 1057# If we do an all arch process set dst to asm-$(hdr-arch) 1058hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1059 1060PHONY += __headers 1061__headers: include/linux/version.h scripts_basic FORCE 1062 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1063 1064PHONY += headers_install_all 1065headers_install_all: 1066 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1067 1068PHONY += headers_install 1069headers_install: __headers 1070 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1071 $(error Headers not exportable for the $(SRCARCH) architecture)) 1072 $(Q)$(MAKE) $(hdr-inst)=include 1073 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1074 1075PHONY += headers_check_all 1076headers_check_all: headers_install_all 1077 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1078 1079PHONY += headers_check 1080headers_check: headers_install 1081 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1082 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1083 1084# --------------------------------------------------------------------------- 1085# Modules 1086 1087ifdef CONFIG_MODULES 1088 1089# By default, build modules as well 1090 1091all: modules 1092 1093# Build modules 1094# 1095# A module can be listed more than once in obj-m resulting in 1096# duplicate lines in modules.order files. Those are removed 1097# using awk while concatenating to the final file. 1098 1099PHONY += modules 1100modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1101 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1102 @echo ' Building modules, stage 2.'; 1103 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1104 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1105 1106 1107# Target to prepare building external modules 1108PHONY += modules_prepare 1109modules_prepare: prepare scripts 1110 1111# Target to install modules 1112PHONY += modules_install 1113modules_install: _modinst_ _modinst_post 1114 1115PHONY += _modinst_ 1116_modinst_: 1117 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1118 echo "Warning: you may need to install module-init-tools"; \ 1119 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1120 sleep 1; \ 1121 fi 1122 @rm -rf $(MODLIB)/kernel 1123 @rm -f $(MODLIB)/source 1124 @mkdir -p $(MODLIB)/kernel 1125 @ln -s $(srctree) $(MODLIB)/source 1126 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1127 rm -f $(MODLIB)/build ; \ 1128 ln -s $(objtree) $(MODLIB)/build ; \ 1129 fi 1130 @cp -f $(objtree)/modules.order $(MODLIB)/ 1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1132 1133# This depmod is only for convenience to give the initial 1134# boot a modules.dep even before / is mounted read-write. However the 1135# boot script depmod is the master version. 1136PHONY += _modinst_post 1137_modinst_post: _modinst_ 1138 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1139 $(call cmd,depmod) 1140 1141else # CONFIG_MODULES 1142 1143# Modules not configured 1144# --------------------------------------------------------------------------- 1145 1146modules modules_install: FORCE 1147 @echo 1148 @echo "The present kernel configuration has modules disabled." 1149 @echo "Type 'make config' and enable loadable module support." 1150 @echo "Then build a kernel with module support enabled." 1151 @echo 1152 @exit 1 1153 1154endif # CONFIG_MODULES 1155 1156### 1157# Cleaning is done on three levels. 1158# make clean Delete most generated files 1159# Leave enough to build external modules 1160# make mrproper Delete the current configuration, and all generated files 1161# make distclean Remove editor backup files, patch leftover files and the like 1162 1163# Directories & files removed with 'make clean' 1164CLEAN_DIRS += $(MODVERDIR) 1165CLEAN_FILES += vmlinux System.map \ 1166 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1167 1168# Directories & files removed with 'make mrproper' 1169MRPROPER_DIRS += include/config include2 usr/include 1170MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1171 include/linux/autoconf.h include/linux/version.h \ 1172 include/linux/utsrelease.h \ 1173 include/linux/bounds.h include/asm*/asm-offsets.h \ 1174 Module.symvers Module.markers tags TAGS cscope* 1175 1176# clean - Delete most, but leave enough to build external modules 1177# 1178clean: rm-dirs := $(CLEAN_DIRS) 1179clean: rm-files := $(CLEAN_FILES) 1180clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1181 1182PHONY += $(clean-dirs) clean archclean 1183$(clean-dirs): 1184 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1185 1186clean: archclean $(clean-dirs) 1187 $(call cmd,rmdirs) 1188 $(call cmd,rmfiles) 1189 @find . $(RCS_FIND_IGNORE) \ 1190 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1191 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1192 -o -name '*.symtypes' -o -name 'modules.order' \ 1193 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1194 -type f -print | xargs rm -f 1195 1196# mrproper - Delete all generated files, including .config 1197# 1198mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1199mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1200mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1201 1202PHONY += $(mrproper-dirs) mrproper archmrproper 1203$(mrproper-dirs): 1204 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1205 1206mrproper: clean archmrproper $(mrproper-dirs) 1207 $(call cmd,rmdirs) 1208 $(call cmd,rmfiles) 1209 1210# distclean 1211# 1212PHONY += distclean 1213 1214distclean: mrproper 1215 @find $(srctree) $(RCS_FIND_IGNORE) \ 1216 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1217 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1218 -o -name '.*.rej' -o -size 0 \ 1219 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1220 -type f -print | xargs rm -f 1221 1222 1223# Packaging of the kernel to various formats 1224# --------------------------------------------------------------------------- 1225# rpm target kept for backward compatibility 1226package-dir := $(srctree)/scripts/package 1227 1228%pkg: include/config/kernel.release FORCE 1229 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1230rpm: include/config/kernel.release FORCE 1231 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1232 1233 1234# Brief documentation of the typical targets used 1235# --------------------------------------------------------------------------- 1236 1237boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1238boards := $(notdir $(boards)) 1239board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1240board-dirs := $(sort $(notdir $(board-dirs:/=))) 1241 1242help: 1243 @echo 'Cleaning targets:' 1244 @echo ' clean - Remove most generated files but keep the config and' 1245 @echo ' enough build support to build external modules' 1246 @echo ' mrproper - Remove all generated files + config + various backup files' 1247 @echo ' distclean - mrproper + remove editor backup and patch files' 1248 @echo '' 1249 @echo 'Configuration targets:' 1250 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1251 @echo '' 1252 @echo 'Other generic targets:' 1253 @echo ' all - Build all targets marked with [*]' 1254 @echo '* vmlinux - Build the bare kernel' 1255 @echo '* modules - Build all modules' 1256 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1257 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1258 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1259 @echo ' dir/ - Build all files in dir and below' 1260 @echo ' dir/file.[ois] - Build specified target only' 1261 @echo ' dir/file.ko - Build module including final link' 1262 @echo ' prepare - Set up for building external modules' 1263 @echo ' tags/TAGS - Generate tags file for editors' 1264 @echo ' cscope - Generate cscope index' 1265 @echo ' kernelrelease - Output the release version string' 1266 @echo ' kernelversion - Output the version stored in Makefile' 1267 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1268 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1269 echo '' 1270 @echo 'Static analysers' 1271 @echo ' checkstack - Generate a list of stack hogs' 1272 @echo ' namespacecheck - Name space analysis on compiled kernel' 1273 @echo ' versioncheck - Sanity check on version.h usage' 1274 @echo ' includecheck - Check for duplicate included header files' 1275 @echo ' export_report - List the usages of all exported symbols' 1276 @echo ' headers_check - Sanity check on exported headers'; \ 1277 echo '' 1278 @echo 'Kernel packaging:' 1279 @$(MAKE) $(build)=$(package-dir) help 1280 @echo '' 1281 @echo 'Documentation targets:' 1282 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1283 @echo '' 1284 @echo 'Architecture specific targets ($(SRCARCH)):' 1285 @$(if $(archhelp),$(archhelp),\ 1286 echo ' No architecture specific help defined for $(SRCARCH)') 1287 @echo '' 1288 @$(if $(boards), \ 1289 $(foreach b, $(boards), \ 1290 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1291 echo '') 1292 @$(if $(board-dirs), \ 1293 $(foreach b, $(board-dirs), \ 1294 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1295 printf " %-16s - Show all of the above\\n" help-boards; \ 1296 echo '') 1297 1298 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1299 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1300 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1301 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1302 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1303 @echo '' 1304 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1305 @echo 'For further info see the ./README file' 1306 1307 1308help-board-dirs := $(addprefix help-,$(board-dirs)) 1309 1310help-boards: $(help-board-dirs) 1311 1312boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1313 1314$(help-board-dirs): help-%: 1315 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1316 @$(if $(boards-per-dir), \ 1317 $(foreach b, $(boards-per-dir), \ 1318 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1319 echo '') 1320 1321 1322# Documentation targets 1323# --------------------------------------------------------------------------- 1324%docs: scripts_basic FORCE 1325 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1326 1327else # KBUILD_EXTMOD 1328 1329### 1330# External module support. 1331# When building external modules the kernel used as basis is considered 1332# read-only, and no consistency checks are made and the make 1333# system is not used on the basis kernel. If updates are required 1334# in the basis kernel ordinary make commands (without M=...) must 1335# be used. 1336# 1337# The following are the only valid targets when building external 1338# modules. 1339# make M=dir clean Delete all automatically generated files 1340# make M=dir modules Make all modules in specified dir 1341# make M=dir Same as 'make M=dir modules' 1342# make M=dir modules_install 1343# Install the modules built in the module directory 1344# Assumes install directory is already created 1345 1346# We are always building modules 1347KBUILD_MODULES := 1 1348PHONY += crmodverdir 1349crmodverdir: 1350 $(cmd_crmodverdir) 1351 1352PHONY += $(objtree)/Module.symvers 1353$(objtree)/Module.symvers: 1354 @test -e $(objtree)/Module.symvers || ( \ 1355 echo; \ 1356 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1357 echo " is missing; modules will have no dependencies and modversions."; \ 1358 echo ) 1359 1360module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1361PHONY += $(module-dirs) modules 1362$(module-dirs): crmodverdir $(objtree)/Module.symvers 1363 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1364 1365modules: $(module-dirs) 1366 @echo ' Building modules, stage 2.'; 1367 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1368 1369PHONY += modules_install 1370modules_install: _emodinst_ _emodinst_post 1371 1372install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1373PHONY += _emodinst_ 1374_emodinst_: 1375 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1376 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1377 1378PHONY += _emodinst_post 1379_emodinst_post: _emodinst_ 1380 $(call cmd,depmod) 1381 1382clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1383 1384PHONY += $(clean-dirs) clean 1385$(clean-dirs): 1386 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1387 1388clean: rm-dirs := $(MODVERDIR) 1389clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1390clean: $(clean-dirs) 1391 $(call cmd,rmdirs) 1392 $(call cmd,rmfiles) 1393 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1394 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1395 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1396 -type f -print | xargs rm -f 1397 1398help: 1399 @echo ' Building external modules.' 1400 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1401 @echo '' 1402 @echo ' modules - default target, build the module(s)' 1403 @echo ' modules_install - install the module' 1404 @echo ' clean - remove generated files in module directory only' 1405 @echo '' 1406 1407# Dummies... 1408PHONY += prepare scripts 1409prepare: ; 1410scripts: ; 1411endif # KBUILD_EXTMOD 1412 1413# Generate tags for editors 1414# --------------------------------------------------------------------------- 1415 1416#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1417#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1418#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1419 1420ifeq ($(src),$(obj)) 1421__srctree = 1422else 1423__srctree = $(srctree)/ 1424endif 1425 1426ifeq ($(ALLSOURCE_ARCHS),) 1427ifeq ($(ARCH),um) 1428ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1429else 1430ALLINCLUDE_ARCHS := $(SRCARCH) 1431endif 1432else 1433#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1434ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1435endif 1436 1437ALLSOURCE_ARCHS := $(SRCARCH) 1438 1439define find-sources 1440 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1441 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1442 -name $1 -print; \ 1443 done ; \ 1444 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1445 -name $1 -print; \ 1446 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1447 \( -name config -o -name 'asm-*' \) -prune \ 1448 -o -name $1 -print; \ 1449 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1450 test -e $(__srctree)include/asm-$${arch} && \ 1451 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1452 -name $1 -print; \ 1453 test -e $(__srctree)arch/$${arch}/include/asm && \ 1454 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \ 1455 -name $1 -print; \ 1456 done ; \ 1457 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1458 -name $1 -print; \ 1459 find $(__srctree) $(RCS_FIND_IGNORE) \ 1460 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1461 -name $1 -print; \ 1462 ) 1463endef 1464 1465define all-sources 1466 $(call find-sources,'*.[chS]') 1467endef 1468define all-kconfigs 1469 $(call find-sources,'Kconfig*') 1470endef 1471define all-defconfigs 1472 $(call find-sources,'defconfig') 1473endef 1474 1475define xtags 1476 if $1 --version 2>&1 | grep -iq exuberant; then \ 1477 $(all-sources) | xargs $1 -a \ 1478 -I __initdata,__exitdata,__acquires,__releases \ 1479 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1480 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1481 --extra=+f --c-kinds=+px \ 1482 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1483 $(all-kconfigs) | xargs $1 -a \ 1484 --langdef=kconfig \ 1485 --language-force=kconfig \ 1486 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1487 $(all-defconfigs) | xargs -r $1 -a \ 1488 --langdef=dotconfig \ 1489 --language-force=dotconfig \ 1490 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1491 elif $1 --version 2>&1 | grep -iq emacs; then \ 1492 $(all-sources) | xargs $1 -a; \ 1493 $(all-kconfigs) | xargs $1 -a \ 1494 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1495 $(all-defconfigs) | xargs -r $1 -a \ 1496 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1497 else \ 1498 $(all-sources) | xargs $1 -a; \ 1499 fi 1500endef 1501 1502quiet_cmd_cscope-file = FILELST cscope.files 1503 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1504 1505quiet_cmd_cscope = MAKE cscope.out 1506 cmd_cscope = cscope -b -f cscope.out 1507 1508cscope: FORCE 1509 $(call cmd,cscope-file) 1510 $(call cmd,cscope) 1511 1512quiet_cmd_TAGS = MAKE $@ 1513define cmd_TAGS 1514 rm -f $@; \ 1515 $(call xtags,etags) 1516endef 1517 1518TAGS: FORCE 1519 $(call cmd,TAGS) 1520 1521quiet_cmd_tags = MAKE $@ 1522define cmd_tags 1523 rm -f $@; \ 1524 $(call xtags,ctags) 1525endef 1526 1527tags: FORCE 1528 $(call cmd,tags) 1529 1530 1531# Scripts to check various things for consistency 1532# --------------------------------------------------------------------------- 1533 1534includecheck: 1535 find * $(RCS_FIND_IGNORE) \ 1536 -name '*.[hcS]' -type f -print | sort \ 1537 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1538 1539versioncheck: 1540 find * $(RCS_FIND_IGNORE) \ 1541 -name '*.[hcS]' -type f -print | sort \ 1542 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1543 1544namespacecheck: 1545 $(PERL) $(srctree)/scripts/namespace.pl 1546 1547export_report: 1548 $(PERL) $(srctree)/scripts/export_report.pl 1549 1550endif #ifeq ($(config-targets),1) 1551endif #ifeq ($(mixed-targets),1) 1552 1553PHONY += checkstack kernelrelease kernelversion 1554 1555# UML needs a little special treatment here. It wants to use the host 1556# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1557# else wants $(ARCH), including people doing cross-builds, which means 1558# that $(SUBARCH) doesn't work here. 1559ifeq ($(ARCH), um) 1560CHECKSTACK_ARCH := $(SUBARCH) 1561else 1562CHECKSTACK_ARCH := $(ARCH) 1563endif 1564checkstack: 1565 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1566 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1567 1568kernelrelease: 1569 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1570 $(error kernelrelease not valid - run 'make prepare' to update it)) 1571kernelversion: 1572 @echo $(KERNELVERSION) 1573 1574# Single targets 1575# --------------------------------------------------------------------------- 1576# Single targets are compatible with: 1577# - build with mixed source and output 1578# - build with separate output dir 'make O=...' 1579# - external modules 1580# 1581# target-dir => where to store outputfile 1582# build-dir => directory in kernel source tree to use 1583 1584ifeq ($(KBUILD_EXTMOD),) 1585 build-dir = $(patsubst %/,%,$(dir $@)) 1586 target-dir = $(dir $@) 1587else 1588 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1589 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1590 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1591endif 1592 1593%.s: %.c prepare scripts FORCE 1594 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1595%.i: %.c prepare scripts FORCE 1596 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1597%.o: %.c prepare scripts FORCE 1598 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1599%.lst: %.c prepare scripts FORCE 1600 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1601%.s: %.S prepare scripts FORCE 1602 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1603%.o: %.S prepare scripts FORCE 1604 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1605%.symtypes: %.c prepare scripts FORCE 1606 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1607 1608# Modules 1609/: prepare scripts FORCE 1610 $(cmd_crmodverdir) 1611 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1612 $(build)=$(build-dir) 1613%/: prepare scripts FORCE 1614 $(cmd_crmodverdir) 1615 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1616 $(build)=$(build-dir) 1617%.ko: prepare scripts FORCE 1618 $(cmd_crmodverdir) 1619 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1620 $(build)=$(build-dir) $(@:.ko=.o) 1621 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1622 1623# FIXME Should go into a make.lib or something 1624# =========================================================================== 1625 1626quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1627 cmd_rmdirs = rm -rf $(rm-dirs) 1628 1629quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1630 cmd_rmfiles = rm -f $(rm-files) 1631 1632# Run depmod only if we have System.map and depmod is executable 1633quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1634 cmd_depmod = \ 1635 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1636 $(DEPMOD) -ae -F System.map \ 1637 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1638 $(KERNELRELEASE); \ 1639 fi 1640 1641# Create temporary dir for module support files 1642# clean it up only when building all modules 1643cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1644 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1645 1646a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1647 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1648 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1649 1650quiet_cmd_as_o_S = AS $@ 1651cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1652 1653# read all saved command lines 1654 1655targets := $(wildcard $(sort $(targets))) 1656cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1657 1658ifneq ($(cmd_files),) 1659 $(cmd_files): ; # Do not try to update included dependency files 1660 include $(cmd_files) 1661endif 1662 1663# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1664# Usage: 1665# $(Q)$(MAKE) $(clean)=dir 1666clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1667 1668endif # skip-makefile 1669 1670PHONY += FORCE 1671FORCE: 1672 1673# Declare the contents of the .PHONY variable as phony. We keep that 1674# information in a variable se we can use it in if_changed and friends. 1675.PHONY: $(PHONY) 1676