1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 27 4EXTRAVERSION = .61 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) 532 533# This warning generated too much noise in a regular build. 534KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 535 536ifdef CONFIG_FRAME_POINTER 537KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 538else 539KBUILD_CFLAGS += -fomit-frame-pointer 540endif 541 542ifdef CONFIG_DEBUG_INFO 543KBUILD_CFLAGS += -g 544KBUILD_AFLAGS += -gdwarf-2 545endif 546 547ifdef CONFIG_FTRACE 548KBUILD_CFLAGS += -pg 549endif 550 551# We trigger additional mismatches with less inlining 552ifdef CONFIG_DEBUG_SECTION_MISMATCH 553KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 554endif 555 556# arch Makefile may override CC so keep this after arch Makefile is included 557NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 558CHECKFLAGS += $(NOSTDINC_FLAGS) 559 560# warn about C99 declaration after statement 561KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 562 563# disable pointer signed / unsigned warnings in gcc 4.0 564KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 565 566# disable invalid "can't wrap" optimzations for signed / pointers 567KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 568 569# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 570# But warn user when we do so 571warn-assign = \ 572$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 573 574ifneq ($(KCPPFLAGS),) 575 $(call warn-assign,CPPFLAGS) 576 KBUILD_CPPFLAGS += $(KCPPFLAGS) 577endif 578ifneq ($(KAFLAGS),) 579 $(call warn-assign,AFLAGS) 580 KBUILD_AFLAGS += $(KAFLAGS) 581endif 582ifneq ($(KCFLAGS),) 583 $(call warn-assign,CFLAGS) 584 KBUILD_CFLAGS += $(KCFLAGS) 585endif 586 587# Use --build-id when available. 588LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 589 $(call ld-option, -Wl$(comma)--build-id,)) 590LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 591LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 592 593# Default kernel image to build when no specific target is given. 594# KBUILD_IMAGE may be overruled on the command line or 595# set in the environment 596# Also any assignments in arch/$(ARCH)/Makefile take precedence over 597# this default value 598export KBUILD_IMAGE ?= vmlinux 599 600# 601# INSTALL_PATH specifies where to place the updated kernel and system map 602# images. Default is /boot, but you can set it to other values 603export INSTALL_PATH ?= /boot 604 605# 606# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 607# relocations required by build roots. This is not defined in the 608# makefile but the argument can be passed to make if needed. 609# 610 611MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 612export MODLIB 613 614# 615# INSTALL_MOD_STRIP, if defined, will cause modules to be 616# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 617# the default option --strip-debug will be used. Otherwise, 618# INSTALL_MOD_STRIP will used as the options to the strip command. 619 620ifdef INSTALL_MOD_STRIP 621ifeq ($(INSTALL_MOD_STRIP),1) 622mod_strip_cmd = $(STRIP) --strip-debug 623else 624mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 625endif # INSTALL_MOD_STRIP=1 626else 627mod_strip_cmd = true 628endif # INSTALL_MOD_STRIP 629export mod_strip_cmd 630 631 632ifeq ($(KBUILD_EXTMOD),) 633core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 634 635vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 636 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 637 $(net-y) $(net-m) $(libs-y) $(libs-m))) 638 639vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 640 $(init-n) $(init-) \ 641 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 642 $(net-n) $(net-) $(libs-n) $(libs-)))) 643 644init-y := $(patsubst %/, %/built-in.o, $(init-y)) 645core-y := $(patsubst %/, %/built-in.o, $(core-y)) 646drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 647net-y := $(patsubst %/, %/built-in.o, $(net-y)) 648libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 649libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 650libs-y := $(libs-y1) $(libs-y2) 651 652# Build vmlinux 653# --------------------------------------------------------------------------- 654# vmlinux is built from the objects selected by $(vmlinux-init) and 655# $(vmlinux-main). Most are built-in.o files from top-level directories 656# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 657# Ordering when linking is important, and $(vmlinux-init) must be first. 658# 659# vmlinux 660# ^ 661# | 662# +-< $(vmlinux-init) 663# | +--< init/version.o + more 664# | 665# +--< $(vmlinux-main) 666# | +--< driver/built-in.o mm/built-in.o + more 667# | 668# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 669# 670# vmlinux version (uname -v) cannot be updated during normal 671# descending-into-subdirs phase since we do not yet know if we need to 672# update vmlinux. 673# Therefore this step is delayed until just before final link of vmlinux - 674# except in the kallsyms case where it is done just before adding the 675# symbols to the kernel. 676# 677# System.map is generated to document addresses of all kernel symbols 678 679vmlinux-init := $(head-y) $(init-y) 680vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 681vmlinux-all := $(vmlinux-init) $(vmlinux-main) 682vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 683export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 684 685# Rule to link vmlinux - also used during CONFIG_KALLSYMS 686# May be overridden by arch/$(ARCH)/Makefile 687quiet_cmd_vmlinux__ ?= LD $@ 688 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 689 -T $(vmlinux-lds) $(vmlinux-init) \ 690 --start-group $(vmlinux-main) --end-group \ 691 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 692 693# Generate new vmlinux version 694quiet_cmd_vmlinux_version = GEN .version 695 cmd_vmlinux_version = set -e; \ 696 if [ ! -r .version ]; then \ 697 rm -f .version; \ 698 echo 1 >.version; \ 699 else \ 700 mv .version .old_version; \ 701 expr 0$$(cat .old_version) + 1 >.version; \ 702 fi; \ 703 $(MAKE) $(build)=init 704 705# Generate System.map 706quiet_cmd_sysmap = SYSMAP 707 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 708 709# Link of vmlinux 710# If CONFIG_KALLSYMS is set .version is already updated 711# Generate System.map and verify that the content is consistent 712# Use + in front of the vmlinux_version rule to silent warning with make -j2 713# First command is ':' to allow us to use + in front of the rule 714define rule_vmlinux__ 715 : 716 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 717 718 $(call cmd,vmlinux__) 719 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 720 721 $(Q)$(if $($(quiet)cmd_sysmap), \ 722 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 723 $(cmd_sysmap) $@ System.map; \ 724 if [ $$? -ne 0 ]; then \ 725 rm -f $@; \ 726 /bin/false; \ 727 fi; 728 $(verify_kallsyms) 729endef 730 731 732ifdef CONFIG_KALLSYMS 733# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 734# It's a three stage process: 735# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 736# empty 737# Running kallsyms on that gives us .tmp_kallsyms1.o with 738# the right size - vmlinux version (uname -v) is updated during this step 739# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 740# but due to the added section, some addresses have shifted. 741# From here, we generate a correct .tmp_kallsyms2.o 742# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 743# o Verify that the System.map from vmlinux matches the map from 744# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 745# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 746# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 747# temporary bypass to allow the kernel to be built while the 748# maintainers work out what went wrong with kallsyms. 749 750ifdef CONFIG_KALLSYMS_EXTRA_PASS 751last_kallsyms := 3 752else 753last_kallsyms := 2 754endif 755 756kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 757 758define verify_kallsyms 759 $(Q)$(if $($(quiet)cmd_sysmap), \ 760 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 761 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 762 $(Q)cmp -s System.map .tmp_System.map || \ 763 (echo Inconsistent kallsyms data; \ 764 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 765 rm .tmp_kallsyms* ; /bin/false ) 766endef 767 768# Update vmlinux version before link 769# Use + in front of this rule to silent warning about make -j1 770# First command is ':' to allow us to use + in front of this rule 771cmd_ksym_ld = $(cmd_vmlinux__) 772define rule_ksym_ld 773 : 774 +$(call cmd,vmlinux_version) 775 $(call cmd,vmlinux__) 776 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 777endef 778 779# Generate .S file with all kernel symbols 780quiet_cmd_kallsyms = KSYM $@ 781 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 782 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 783 784.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 785 $(call if_changed_dep,as_o_S) 786 787.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 788 $(call cmd,kallsyms) 789 790# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 791.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 792 $(call if_changed_rule,ksym_ld) 793 794.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 795 $(call if_changed,vmlinux__) 796 797.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 798 $(call if_changed,vmlinux__) 799 800# Needs to visit scripts/ before $(KALLSYMS) can be used. 801$(KALLSYMS): scripts ; 802 803# Generate some data for debugging strange kallsyms problems 804debug_kallsyms: .tmp_map$(last_kallsyms) 805 806.tmp_map%: .tmp_vmlinux% FORCE 807 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 808 809.tmp_map3: .tmp_map2 810 811.tmp_map2: .tmp_map1 812 813endif # ifdef CONFIG_KALLSYMS 814 815# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 816# relevant sections renamed as per the linker script. 817quiet_cmd_vmlinux-modpost = LD $@ 818 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 819 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 820 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 821define rule_vmlinux-modpost 822 : 823 +$(call cmd,vmlinux-modpost) 824 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 825 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 826endef 827 828# vmlinux image - including updated kernel symbols 829vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 830ifdef CONFIG_HEADERS_CHECK 831 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 832endif 833ifdef CONFIG_SAMPLES 834 $(Q)$(MAKE) $(build)=samples 835endif 836ifdef CONFIG_BUILD_DOCSRC 837 $(Q)$(MAKE) $(build)=Documentation 838endif 839 $(call vmlinux-modpost) 840 $(call if_changed_rule,vmlinux__) 841 $(Q)rm -f .old_version 842 843# build vmlinux.o first to catch section mismatch errors early 844ifdef CONFIG_KALLSYMS 845.tmp_vmlinux1: vmlinux.o 846endif 847 848modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 849vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 850 $(call if_changed_rule,vmlinux-modpost) 851 852# The actual objects are generated when descending, 853# make sure no implicit rule kicks in 854$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 855 856# Handle descending into subdirectories listed in $(vmlinux-dirs) 857# Preset locale variables to speed up the build process. Limit locale 858# tweaks to this spot to avoid wrong language settings when running 859# make menuconfig etc. 860# Error messages still appears in the original language 861 862PHONY += $(vmlinux-dirs) 863$(vmlinux-dirs): prepare scripts 864 $(Q)$(MAKE) $(build)=$@ 865 866# Build the kernel release string 867# 868# The KERNELRELEASE value built here is stored in the file 869# include/config/kernel.release, and is used when executing several 870# make targets, such as "make install" or "make modules_install." 871# 872# The eventual kernel release string consists of the following fields, 873# shown in a hierarchical format to show how smaller parts are concatenated 874# to form the larger and final value, with values coming from places like 875# the Makefile, kernel config options, make command line options and/or 876# SCM tag information. 877# 878# $(KERNELVERSION) 879# $(VERSION) eg, 2 880# $(PATCHLEVEL) eg, 6 881# $(SUBLEVEL) eg, 18 882# $(EXTRAVERSION) eg, -rc6 883# $(localver-full) 884# $(localver) 885# localversion* (files without backups, containing '~') 886# $(CONFIG_LOCALVERSION) (from kernel config setting) 887# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 888# ./scripts/setlocalversion (SCM tag, if one exists) 889# $(LOCALVERSION) (from make command line if provided) 890# 891# Note how the final $(localver-auto) string is included *only* if the 892# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 893# moment, only git is supported but other SCMs can edit the script 894# scripts/setlocalversion and add the appropriate checks as needed. 895 896pattern = ".*/localversion[^~]*" 897string = $(shell cat /dev/null \ 898 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 899 900localver = $(subst $(space),, $(string) \ 901 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 902 903# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 904# and if the SCM is know a tag from the SCM is appended. 905# The appended tag is determined by the SCM used. 906# 907# Currently, only git is supported. 908# Other SCMs can edit scripts/setlocalversion and add the appropriate 909# checks as needed. 910ifdef CONFIG_LOCALVERSION_AUTO 911 _localver-auto = $(shell $(CONFIG_SHELL) \ 912 $(srctree)/scripts/setlocalversion $(srctree)) 913 localver-auto = $(LOCALVERSION)$(_localver-auto) 914endif 915 916localver-full = $(localver)$(localver-auto) 917 918# Store (new) KERNELRELASE string in include/config/kernel.release 919kernelrelease = $(KERNELVERSION)$(localver-full) 920include/config/kernel.release: include/config/auto.conf FORCE 921 $(Q)rm -f $@ 922 $(Q)echo $(kernelrelease) > $@ 923 924 925# Things we need to do before we recursively start building the kernel 926# or the modules are listed in "prepare". 927# A multi level approach is used. prepareN is processed before prepareN-1. 928# archprepare is used in arch Makefiles and when processed asm symlink, 929# version.h and scripts_basic is processed / created. 930 931# Listed in dependency order 932PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 933 934# prepare3 is used to check if we are building in a separate output directory, 935# and if so do: 936# 1) Check that make has not been executed in the kernel src $(srctree) 937# 2) Create the include2 directory, used for the second asm symlink 938prepare3: include/config/kernel.release 939ifneq ($(KBUILD_SRC),) 940 @echo ' Using $(srctree) as source for kernel' 941 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 942 echo " $(srctree) is not clean, please run 'make mrproper'";\ 943 echo " in the '$(srctree)' directory.";\ 944 /bin/false; \ 945 fi; 946 $(Q)if [ ! -d include2 ]; then \ 947 mkdir -p include2; \ 948 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 949 fi 950endif 951 952# prepare2 creates a makefile if using a separate output directory 953prepare2: prepare3 outputmakefile 954 955prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 956 include/asm include/config/auto.conf 957 $(cmd_crmodverdir) 958 959archprepare: prepare1 scripts_basic 960 961prepare0: archprepare FORCE 962 $(Q)$(MAKE) $(build)=. 963 $(Q)$(MAKE) $(build)=. missing-syscalls 964 965# All the preparing.. 966prepare: prepare0 967 968# Leave this as default for preprocessing vmlinux.lds.S, which is now 969# done in arch/$(ARCH)/kernel/Makefile 970 971export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 972 973# The asm symlink changes when $(ARCH) changes. 974# Detect this and ask user to run make mrproper 975define check-symlink 976 set -e; \ 977 if [ -L include/asm ]; then \ 978 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 979 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 980 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 981 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 982 exit 1; \ 983 fi; \ 984 fi 985endef 986 987# We create the target directory of the symlink if it does 988# not exist so the test in chack-symlink works and we have a 989# directory for generated filesas used by some architectures. 990define create-symlink 991 if [ ! -L include/asm ]; then \ 992 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 993 if [ ! -d include/asm-$(SRCARCH) ]; then \ 994 mkdir -p include/asm-$(SRCARCH); \ 995 fi; \ 996 ln -fsn asm-$(SRCARCH) $@; \ 997 fi 998endef 999 1000include/asm: FORCE
1001 $(Q)$(check-symlink) 1002 $(Q)$(create-symlink) 1003 1004# Generate some files 1005# --------------------------------------------------------------------------- 1006 1007# KERNELRELEASE can change from a few different places, meaning version.h 1008# needs to be updated, so this check is forced on all builds 1009 1010uts_len := 64 1011define filechk_utsrelease.h 1012 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1013 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1014 exit 1; \ 1015 fi; \ 1016 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1017endef 1018 1019define filechk_version.h 1020 (echo \#define LINUX_VERSION_CODE $(shell \ 1021 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1022 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1023endef 1024 1025include/linux/version.h: $(srctree)/Makefile FORCE 1026 $(call filechk,version.h) 1027 1028include/linux/utsrelease.h: include/config/kernel.release FORCE 1029 $(call filechk,utsrelease.h) 1030 1031# --------------------------------------------------------------------------- 1032 1033PHONY += depend dep 1034depend dep: 1035 @echo '*** Warning: make $@ is unnecessary now.' 1036 1037# --------------------------------------------------------------------------- 1038# Firmware install 1039INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1040export INSTALL_FW_PATH 1041 1042PHONY += firmware_install 1043firmware_install: FORCE 1044 @mkdir -p $(objtree)/firmware 1045 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1046 1047# --------------------------------------------------------------------------- 1048# Kernel headers 1049 1050#Default location for installed headers 1051export INSTALL_HDR_PATH = $(objtree)/usr 1052 1053hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1054# Find out where the Kbuild file is located to support 1055# arch/$(ARCH)/include/asm 1056hdr-dir = $(strip \ 1057 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1058 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1059 1060# If we do an all arch process set dst to asm-$(hdr-arch) 1061hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1062 1063PHONY += __headers 1064__headers: include/linux/version.h scripts_basic FORCE 1065 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1066 1067PHONY += headers_install_all 1068headers_install_all: 1069 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1070 1071PHONY += headers_install 1072headers_install: __headers 1073 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1074 $(error Headers not exportable for the $(SRCARCH) architecture)) 1075 $(Q)$(MAKE) $(hdr-inst)=include 1076 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1077 1078PHONY += headers_check_all 1079headers_check_all: headers_install_all 1080 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1081 1082PHONY += headers_check 1083headers_check: headers_install 1084 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1085 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1086 1087# --------------------------------------------------------------------------- 1088# Modules 1089 1090ifdef CONFIG_MODULES 1091 1092# By default, build modules as well 1093 1094all: modules 1095 1096# Build modules 1097# 1098# A module can be listed more than once in obj-m resulting in 1099# duplicate lines in modules.order files. Those are removed 1100# using awk while concatenating to the final file. 1101 1102PHONY += modules 1103modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1104 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1105 @echo ' Building modules, stage 2.'; 1106 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1107 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1108 1109 1110# Target to prepare building external modules 1111PHONY += modules_prepare 1112modules_prepare: prepare scripts 1113 1114# Target to install modules 1115PHONY += modules_install 1116modules_install: _modinst_ _modinst_post 1117 1118PHONY += _modinst_ 1119_modinst_: 1120 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1121 echo "Warning: you may need to install module-init-tools"; \ 1122 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1123 sleep 1; \ 1124 fi 1125 @rm -rf $(MODLIB)/kernel 1126 @rm -f $(MODLIB)/source 1127 @mkdir -p $(MODLIB)/kernel 1128 @ln -s $(srctree) $(MODLIB)/source 1129 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1130 rm -f $(MODLIB)/build ; \ 1131 ln -s $(objtree) $(MODLIB)/build ; \ 1132 fi 1133 @cp -f $(objtree)/modules.order $(MODLIB)/ 1134 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1135 1136# This depmod is only for convenience to give the initial 1137# boot a modules.dep even before / is mounted read-write. However the 1138# boot script depmod is the master version. 1139PHONY += _modinst_post 1140_modinst_post: _modinst_ 1141 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1142 $(call cmd,depmod) 1143 1144else # CONFIG_MODULES 1145 1146# Modules not configured 1147# --------------------------------------------------------------------------- 1148 1149modules modules_install: FORCE 1150 @echo 1151 @echo "The present kernel configuration has modules disabled." 1152 @echo "Type 'make config' and enable loadable module support." 1153 @echo "Then build a kernel with module support enabled." 1154 @echo 1155 @exit 1 1156 1157endif # CONFIG_MODULES 1158 1159### 1160# Cleaning is done on three levels. 1161# make clean Delete most generated files 1162# Leave enough to build external modules 1163# make mrproper Delete the current configuration, and all generated files 1164# make distclean Remove editor backup files, patch leftover files and the like 1165 1166# Directories & files removed with 'make clean' 1167CLEAN_DIRS += $(MODVERDIR) 1168CLEAN_FILES += vmlinux System.map \ 1169 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1170 1171# Directories & files removed with 'make mrproper' 1172MRPROPER_DIRS += include/config include2 usr/include 1173MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1174 include/linux/autoconf.h include/linux/version.h \ 1175 include/linux/utsrelease.h \ 1176 include/linux/bounds.h include/asm*/asm-offsets.h \ 1177 Module.symvers Module.markers tags TAGS cscope* 1178 1179# clean - Delete most, but leave enough to build external modules 1180# 1181clean: rm-dirs := $(CLEAN_DIRS) 1182clean: rm-files := $(CLEAN_FILES) 1183clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1184 1185PHONY += $(clean-dirs) clean archclean 1186$(clean-dirs): 1187 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1188 1189clean: archclean $(clean-dirs) 1190 $(call cmd,rmdirs) 1191 $(call cmd,rmfiles) 1192 @find . $(RCS_FIND_IGNORE) \ 1193 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1194 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1195 -o -name '*.symtypes' -o -name 'modules.order' \ 1196 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1197 -type f -print | xargs rm -f 1198 1199# mrproper - Delete all generated files, including .config 1200# 1201mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1202mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1203mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1204 1205PHONY += $(mrproper-dirs) mrproper archmrproper 1206$(mrproper-dirs): 1207 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1208 1209mrproper: clean archmrproper $(mrproper-dirs) 1210 $(call cmd,rmdirs) 1211 $(call cmd,rmfiles) 1212 1213# distclean 1214# 1215PHONY += distclean 1216 1217distclean: mrproper 1218 @find $(srctree) $(RCS_FIND_IGNORE) \ 1219 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1220 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1221 -o -name '.*.rej' -o -size 0 \ 1222 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1223 -type f -print | xargs rm -f 1224 1225 1226# Packaging of the kernel to various formats 1227# --------------------------------------------------------------------------- 1228# rpm target kept for backward compatibility 1229package-dir := $(srctree)/scripts/package 1230 1231%pkg: include/config/kernel.release FORCE 1232 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1233rpm: include/config/kernel.release FORCE 1234 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1235 1236 1237# Brief documentation of the typical targets used 1238# --------------------------------------------------------------------------- 1239 1240boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1241boards := $(notdir $(boards)) 1242board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1243board-dirs := $(sort $(notdir $(board-dirs:/=))) 1244 1245help: 1246 @echo 'Cleaning targets:' 1247 @echo ' clean - Remove most generated files but keep the config and' 1248 @echo ' enough build support to build external modules' 1249 @echo ' mrproper - Remove all generated files + config + various backup files' 1250 @echo ' distclean - mrproper + remove editor backup and patch files' 1251 @echo '' 1252 @echo 'Configuration targets:' 1253 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1254 @echo '' 1255 @echo 'Other generic targets:' 1256 @echo ' all - Build all targets marked with [*]' 1257 @echo '* vmlinux - Build the bare kernel' 1258 @echo '* modules - Build all modules' 1259 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1260 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1261 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1262 @echo ' dir/ - Build all files in dir and below' 1263 @echo ' dir/file.[ois] - Build specified target only' 1264 @echo ' dir/file.ko - Build module including final link' 1265 @echo ' prepare - Set up for building external modules' 1266 @echo ' tags/TAGS - Generate tags file for editors' 1267 @echo ' cscope - Generate cscope index' 1268 @echo ' kernelrelease - Output the release version string' 1269 @echo ' kernelversion - Output the version stored in Makefile' 1270 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1271 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1272 echo '' 1273 @echo 'Static analysers' 1274 @echo ' checkstack - Generate a list of stack hogs' 1275 @echo ' namespacecheck - Name space analysis on compiled kernel' 1276 @echo ' versioncheck - Sanity check on version.h usage' 1277 @echo ' includecheck - Check for duplicate included header files' 1278 @echo ' export_report - List the usages of all exported symbols' 1279 @echo ' headers_check - Sanity check on exported headers'; \ 1280 echo '' 1281 @echo 'Kernel packaging:' 1282 @$(MAKE) $(build)=$(package-dir) help 1283 @echo '' 1284 @echo 'Documentation targets:' 1285 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1286 @echo '' 1287 @echo 'Architecture specific targets ($(SRCARCH)):' 1288 @$(if $(archhelp),$(archhelp),\ 1289 echo ' No architecture specific help defined for $(SRCARCH)') 1290 @echo '' 1291 @$(if $(boards), \ 1292 $(foreach b, $(boards), \ 1293 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1294 echo '') 1295 @$(if $(board-dirs), \ 1296 $(foreach b, $(board-dirs), \ 1297 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1298 printf " %-16s - Show all of the above\\n" help-boards; \ 1299 echo '') 1300 1301 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1302 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1303 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1304 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1305 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1306 @echo '' 1307 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1308 @echo 'For further info see the ./README file' 1309 1310 1311help-board-dirs := $(addprefix help-,$(board-dirs)) 1312 1313help-boards: $(help-board-dirs) 1314 1315boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1316 1317$(help-board-dirs): help-%: 1318 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1319 @$(if $(boards-per-dir), \ 1320 $(foreach b, $(boards-per-dir), \ 1321 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1322 echo '') 1323 1324 1325# Documentation targets 1326# --------------------------------------------------------------------------- 1327%docs: scripts_basic FORCE 1328 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1329 1330else # KBUILD_EXTMOD 1331 1332### 1333# External module support. 1334# When building external modules the kernel used as basis is considered 1335# read-only, and no consistency checks are made and the make 1336# system is not used on the basis kernel. If updates are required 1337# in the basis kernel ordinary make commands (without M=...) must 1338# be used. 1339# 1340# The following are the only valid targets when building external 1341# modules. 1342# make M=dir clean Delete all automatically generated files 1343# make M=dir modules Make all modules in specified dir 1344# make M=dir Same as 'make M=dir modules' 1345# make M=dir modules_install 1346# Install the modules built in the module directory 1347# Assumes install directory is already created 1348 1349# We are always building modules 1350KBUILD_MODULES := 1 1351PHONY += crmodverdir 1352crmodverdir: 1353 $(cmd_crmodverdir) 1354 1355PHONY += $(objtree)/Module.symvers 1356$(objtree)/Module.symvers: 1357 @test -e $(objtree)/Module.symvers || ( \ 1358 echo; \ 1359 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1360 echo " is missing; modules will have no dependencies and modversions."; \ 1361 echo ) 1362 1363module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1364PHONY += $(module-dirs) modules 1365$(module-dirs): crmodverdir $(objtree)/Module.symvers 1366 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1367 1368modules: $(module-dirs) 1369 @echo ' Building modules, stage 2.'; 1370 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1371 1372PHONY += modules_install 1373modules_install: _emodinst_ _emodinst_post 1374 1375install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1376PHONY += _emodinst_ 1377_emodinst_: 1378 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1379 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1380 1381PHONY += _emodinst_post 1382_emodinst_post: _emodinst_ 1383 $(call cmd,depmod) 1384 1385clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1386 1387PHONY += $(clean-dirs) clean 1388$(clean-dirs): 1389 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1390 1391clean: rm-dirs := $(MODVERDIR) 1392clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1393clean: $(clean-dirs) 1394 $(call cmd,rmdirs) 1395 $(call cmd,rmfiles) 1396 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1397 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1398 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1399 -type f -print | xargs rm -f 1400 1401help: 1402 @echo ' Building external modules.' 1403 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1404 @echo '' 1405 @echo ' modules - default target, build the module(s)' 1406 @echo ' modules_install - install the module' 1407 @echo ' clean - remove generated files in module directory only' 1408 @echo '' 1409 1410# Dummies... 1411PHONY += prepare scripts 1412prepare: ; 1413scripts: ; 1414endif # KBUILD_EXTMOD 1415 1416# Generate tags for editors 1417# --------------------------------------------------------------------------- 1418 1419#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1420#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1421#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1422 1423ifeq ($(src),$(obj)) 1424__srctree = 1425else 1426__srctree = $(srctree)/ 1427endif 1428 1429ifeq ($(ALLSOURCE_ARCHS),) 1430ifeq ($(ARCH),um) 1431ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1432else 1433ALLINCLUDE_ARCHS := $(SRCARCH) 1434endif 1435else 1436#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1437ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1438endif 1439 1440ALLSOURCE_ARCHS := $(SRCARCH) 1441 1442define find-sources 1443 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1444 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1445 -name $1 -print; \ 1446 done ; \ 1447 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1448 -name $1 -print; \ 1449 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1450 \( -name config -o -name 'asm-*' \) -prune \ 1451 -o -name $1 -print; \ 1452 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1453 test -e $(__srctree)include/asm-$${arch} && \ 1454 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1455 -name $1 -print; \ 1456 test -e $(__srctree)arch/$${arch}/include/asm && \ 1457 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \ 1458 -name $1 -print; \ 1459 done ; \ 1460 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1461 -name $1 -print; \ 1462 find $(__srctree) $(RCS_FIND_IGNORE) \ 1463 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1464 -name $1 -print; \ 1465 ) 1466endef 1467 1468define all-sources 1469 $(call find-sources,'*.[chS]') 1470endef 1471define all-kconfigs 1472 $(call find-sources,'Kconfig*') 1473endef 1474define all-defconfigs 1475 $(call find-sources,'defconfig') 1476endef 1477 1478define xtags 1479 if $1 --version 2>&1 | grep -iq exuberant; then \ 1480 $(all-sources) | xargs $1 -a \ 1481 -I __initdata,__exitdata,__acquires,__releases \ 1482 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1483 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1484 --extra=+f --c-kinds=+px \ 1485 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1486 $(all-kconfigs) | xargs $1 -a \ 1487 --langdef=kconfig \ 1488 --language-force=kconfig \ 1489 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1490 $(all-defconfigs) | xargs -r $1 -a \ 1491 --langdef=dotconfig \ 1492 --language-force=dotconfig \ 1493 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1494 elif $1 --version 2>&1 | grep -iq emacs; then \ 1495 $(all-sources) | xargs $1 -a; \ 1496 $(all-kconfigs) | xargs $1 -a \ 1497 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1498 $(all-defconfigs) | xargs -r $1 -a \ 1499 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1500 else \ 1501 $(all-sources) | xargs $1 -a; \ 1502 fi 1503endef 1504 1505quiet_cmd_cscope-file = FILELST cscope.files 1506 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1507 1508quiet_cmd_cscope = MAKE cscope.out 1509 cmd_cscope = cscope -b -f cscope.out 1510 1511cscope: FORCE 1512 $(call cmd,cscope-file) 1513 $(call cmd,cscope) 1514 1515quiet_cmd_TAGS = MAKE $@ 1516define cmd_TAGS 1517 rm -f $@; \ 1518 $(call xtags,etags) 1519endef 1520 1521TAGS: FORCE 1522 $(call cmd,TAGS) 1523 1524quiet_cmd_tags = MAKE $@ 1525define cmd_tags 1526 rm -f $@; \ 1527 $(call xtags,ctags) 1528endef 1529 1530tags: FORCE 1531 $(call cmd,tags) 1532 1533 1534# Scripts to check various things for consistency 1535# --------------------------------------------------------------------------- 1536 1537includecheck: 1538 find * $(RCS_FIND_IGNORE) \ 1539 -name '*.[hcS]' -type f -print | sort \ 1540 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1541 1542versioncheck: 1543 find * $(RCS_FIND_IGNORE) \ 1544 -name '*.[hcS]' -type f -print | sort \ 1545 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1546 1547namespacecheck: 1548 $(PERL) $(srctree)/scripts/namespace.pl 1549 1550export_report: 1551 $(PERL) $(srctree)/scripts/export_report.pl 1552 1553endif #ifeq ($(config-targets),1) 1554endif #ifeq ($(mixed-targets),1) 1555 1556PHONY += checkstack kernelrelease kernelversion 1557 1558# UML needs a little special treatment here. It wants to use the host 1559# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1560# else wants $(ARCH), including people doing cross-builds, which means 1561# that $(SUBARCH) doesn't work here. 1562ifeq ($(ARCH), um) 1563CHECKSTACK_ARCH := $(SUBARCH) 1564else 1565CHECKSTACK_ARCH := $(ARCH) 1566endif 1567checkstack: 1568 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1569 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1570 1571kernelrelease: 1572 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1573 $(error kernelrelease not valid - run 'make prepare' to update it)) 1574kernelversion: 1575 @echo $(KERNELVERSION) 1576 1577# Single targets 1578# --------------------------------------------------------------------------- 1579# Single targets are compatible with: 1580# - build with mixed source and output 1581# - build with separate output dir 'make O=...' 1582# - external modules 1583# 1584# target-dir => where to store outputfile 1585# build-dir => directory in kernel source tree to use 1586 1587ifeq ($(KBUILD_EXTMOD),) 1588 build-dir = $(patsubst %/,%,$(dir $@)) 1589 target-dir = $(dir $@) 1590else 1591 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1592 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1593 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1594endif 1595 1596%.s: %.c prepare scripts FORCE 1597 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1598%.i: %.c prepare scripts FORCE 1599 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1600%.o: %.c prepare scripts FORCE 1601 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1602%.lst: %.c prepare scripts FORCE 1603 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1604%.s: %.S prepare scripts FORCE 1605 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1606%.o: %.S prepare scripts FORCE 1607 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1608%.symtypes: %.c prepare scripts FORCE 1609 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1610 1611# Modules 1612/: prepare scripts FORCE 1613 $(cmd_crmodverdir) 1614 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1615 $(build)=$(build-dir) 1616%/: prepare scripts FORCE 1617 $(cmd_crmodverdir) 1618 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1619 $(build)=$(build-dir) 1620%.ko: prepare scripts FORCE 1621 $(cmd_crmodverdir) 1622 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1623 $(build)=$(build-dir) $(@:.ko=.o) 1624 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1625 1626# FIXME Should go into a make.lib or something 1627# =========================================================================== 1628 1629quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1630 cmd_rmdirs = rm -rf $(rm-dirs) 1631 1632quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1633 cmd_rmfiles = rm -f $(rm-files) 1634 1635# Run depmod only if we have System.map and depmod is executable 1636quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1637 cmd_depmod = \ 1638 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1639 $(DEPMOD) -ae -F System.map \ 1640 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1641 $(KERNELRELEASE); \ 1642 fi 1643 1644# Create temporary dir for module support files 1645# clean it up only when building all modules 1646cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1647 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1648 1649a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1650 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1651 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1652 1653quiet_cmd_as_o_S = AS $@ 1654cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1655 1656# read all saved command lines 1657 1658targets := $(wildcard $(sort $(targets))) 1659cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1660 1661ifneq ($(cmd_files),) 1662 $(cmd_files): ; # Do not try to update included dependency files 1663 include $(cmd_files) 1664endif 1665 1666# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1667# Usage: 1668# $(Q)$(MAKE) $(clean)=dir 1669clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1670 1671endif # skip-makefile 1672 1673PHONY += FORCE 1674FORCE: 1675 1676# Declare the contents of the .PHONY variable as phony. We keep that 1677# information in a variable se we can use it in if_changed and friends. 1678.PHONY: $(PHONY) 1679