1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 28 4EXTRAVERSION = .7 5NAME = Erotic Pickled Herring 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 344KBUILD_AFLAGS := -D__ASSEMBLY__ 345 346# Read KERNELRELEASE from include/config/kernel.release (if it exists) 347KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 348KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 349 350export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 351export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 352export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 353export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 354 355export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 356export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 357export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 358 359# When compiling out-of-tree modules, put MODVERDIR in the module 360# tree rather than in the kernel tree. The kernel tree might 361# even be read-only. 362export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 363 364# Files to ignore in find ... statements 365 366RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 367export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 368 369# =========================================================================== 370# Rules shared between *config targets and build targets 371 372# Basic helpers built in scripts/ 373PHONY += scripts_basic 374scripts_basic: 375 $(Q)$(MAKE) $(build)=scripts/basic 376 377# To avoid any implicit rule to kick in, define an empty command. 378scripts/basic/%: scripts_basic ; 379 380PHONY += outputmakefile 381# outputmakefile generates a Makefile in the output directory, if using a 382# separate output directory. This allows convenient use of make in the 383# output directory. 384outputmakefile: 385ifneq ($(KBUILD_SRC),) 386 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 387 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 388endif 389 390# To make sure we do not include .config for any of the *config targets 391# catch them early, and hand them over to scripts/kconfig/Makefile 392# It is allowed to specify more targets when calling make, including 393# mixing *config targets and build targets. 394# For example 'make oldconfig all'. 395# Detect when mixed targets is specified, and make a second invocation 396# of make so .config is not included in this case either (for *config). 397 398no-dot-config-targets := clean mrproper distclean \ 399 cscope TAGS tags help %docs check% \ 400 include/linux/version.h headers_% \ 401 kernelrelease kernelversion 402 403config-targets := 0 404mixed-targets := 0 405dot-config := 1 406 407ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 408 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 409 dot-config := 0 410 endif 411endif 412 413ifeq ($(KBUILD_EXTMOD),) 414 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 415 config-targets := 1 416 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 417 mixed-targets := 1 418 endif 419 endif 420endif 421 422ifeq ($(mixed-targets),1) 423# =========================================================================== 424# We're called with mixed targets (*config and build targets). 425# Handle them one by one. 426 427%:: FORCE 428 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 429 430else 431ifeq ($(config-targets),1) 432# =========================================================================== 433# *config targets only - make sure prerequisites are updated, and descend 434# in scripts/kconfig to make the *config target 435 436# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 437# KBUILD_DEFCONFIG may point out an alternative default configuration 438# used for 'make defconfig' 439include $(srctree)/arch/$(SRCARCH)/Makefile 440export KBUILD_DEFCONFIG KBUILD_KCONFIG 441 442config %config: scripts_basic outputmakefile FORCE 443 $(Q)mkdir -p include/linux include/config 444 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 445 446else 447# =========================================================================== 448# Build targets only - this includes vmlinux, arch specific targets, clean 449# targets and others. In general all targets except *config targets. 450 451ifeq ($(KBUILD_EXTMOD),) 452# Additional helpers built in scripts/ 453# Carefully list dependencies so we do not try to build scripts twice 454# in parallel 455PHONY += scripts 456scripts: scripts_basic include/config/auto.conf 457 $(Q)$(MAKE) $(build)=$(@) 458 459# Objects we will link into vmlinux / subdirs we need to visit 460init-y := init/ 461drivers-y := drivers/ sound/ firmware/ 462net-y := net/ 463libs-y := lib/ 464core-y := usr/ 465endif # KBUILD_EXTMOD 466 467ifeq ($(dot-config),1) 468# Read in config 469-include include/config/auto.conf 470 471ifeq ($(KBUILD_EXTMOD),) 472# Read in dependencies to all Kconfig* files, make sure to run 473# oldconfig if changes are detected. 474-include include/config/auto.conf.cmd 475 476# To avoid any implicit rule to kick in, define an empty command 477$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 478 479# If .config is newer than include/config/auto.conf, someone tinkered 480# with it and forgot to run make oldconfig. 481# if auto.conf.cmd is missing then we are probably in a cleaned tree so 482# we execute the config step to be sure to catch updated Kconfig files 483include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 484 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 485else 486# external modules needs include/linux/autoconf.h and include/config/auto.conf 487# but do not care if they are up-to-date. Use auto.conf to trigger the test 488PHONY += include/config/auto.conf 489 490include/config/auto.conf: 491 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 492 echo; \ 493 echo " ERROR: Kernel configuration is invalid."; \ 494 echo " include/linux/autoconf.h or $@ are missing."; \ 495 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 496 echo; \ 497 /bin/false) 498 499endif # KBUILD_EXTMOD 500 501else 502# Dummy target needed, because used as prerequisite 503include/config/auto.conf: ; 504endif # $(dot-config) 505 506# The all: target is the default when no target is given on the 507# command line. 508# This allow a user to issue only 'make' to build a kernel including modules 509# Defaults vmlinux but it is usually overridden in the arch makefile 510all: vmlinux 511 512ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 513KBUILD_CFLAGS += -Os 514else 515KBUILD_CFLAGS += -O2 516endif 517 518include $(srctree)/arch/$(SRCARCH)/Makefile 519 520ifneq (CONFIG_FRAME_WARN,0) 521KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 522endif 523 524# Force gcc to behave correct even for buggy distributions 525# Arch Makefiles may override this setting 526KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 527 528ifdef CONFIG_FRAME_POINTER 529KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 530else 531KBUILD_CFLAGS += -fomit-frame-pointer 532endif 533 534ifdef CONFIG_DEBUG_INFO 535KBUILD_CFLAGS += -g 536KBUILD_AFLAGS += -gdwarf-2 537endif 538 539ifdef CONFIG_FUNCTION_TRACER 540KBUILD_CFLAGS += -pg 541endif 542 543# We trigger additional mismatches with less inlining 544ifdef CONFIG_DEBUG_SECTION_MISMATCH 545KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 546endif 547 548# arch Makefile may override CC so keep this after arch Makefile is included 549NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 550CHECKFLAGS += $(NOSTDINC_FLAGS) 551 552# warn about C99 declaration after statement 553KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 554 555# disable pointer signed / unsigned warnings in gcc 4.0 556KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 557 558# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 559# But warn user when we do so 560warn-assign = \ 561$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 562 563ifneq ($(KCPPFLAGS),) 564 $(call warn-assign,CPPFLAGS) 565 KBUILD_CPPFLAGS += $(KCPPFLAGS) 566endif 567ifneq ($(KAFLAGS),) 568 $(call warn-assign,AFLAGS) 569 KBUILD_AFLAGS += $(KAFLAGS) 570endif 571ifneq ($(KCFLAGS),) 572 $(call warn-assign,CFLAGS) 573 KBUILD_CFLAGS += $(KCFLAGS) 574endif 575 576# Use --build-id when available. 577LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 578 $(call ld-option, -Wl$(comma)--build-id,)) 579LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 580LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 581 582# Default kernel image to build when no specific target is given. 583# KBUILD_IMAGE may be overruled on the command line or 584# set in the environment 585# Also any assignments in arch/$(ARCH)/Makefile take precedence over 586# this default value 587export KBUILD_IMAGE ?= vmlinux 588 589# 590# INSTALL_PATH specifies where to place the updated kernel and system map 591# images. Default is /boot, but you can set it to other values 592export INSTALL_PATH ?= /boot 593 594# 595# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 596# relocations required by build roots. This is not defined in the 597# makefile but the argument can be passed to make if needed. 598# 599 600MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 601export MODLIB 602 603# 604# INSTALL_MOD_STRIP, if defined, will cause modules to be 605# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 606# the default option --strip-debug will be used. Otherwise, 607# INSTALL_MOD_STRIP will used as the options to the strip command. 608 609ifdef INSTALL_MOD_STRIP 610ifeq ($(INSTALL_MOD_STRIP),1) 611mod_strip_cmd = $(STRIP) --strip-debug 612else 613mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 614endif # INSTALL_MOD_STRIP=1 615else 616mod_strip_cmd = true 617endif # INSTALL_MOD_STRIP 618export mod_strip_cmd 619 620 621ifeq ($(KBUILD_EXTMOD),) 622core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 623 624vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 625 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 626 $(net-y) $(net-m) $(libs-y) $(libs-m))) 627 628vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 629 $(init-n) $(init-) \ 630 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 631 $(net-n) $(net-) $(libs-n) $(libs-)))) 632 633init-y := $(patsubst %/, %/built-in.o, $(init-y)) 634core-y := $(patsubst %/, %/built-in.o, $(core-y)) 635drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 636net-y := $(patsubst %/, %/built-in.o, $(net-y)) 637libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 638libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 639libs-y := $(libs-y1) $(libs-y2) 640 641# Build vmlinux 642# --------------------------------------------------------------------------- 643# vmlinux is built from the objects selected by $(vmlinux-init) and 644# $(vmlinux-main). Most are built-in.o files from top-level directories 645# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 646# Ordering when linking is important, and $(vmlinux-init) must be first. 647# 648# vmlinux 649# ^ 650# | 651# +-< $(vmlinux-init) 652# | +--< init/version.o + more 653# | 654# +--< $(vmlinux-main) 655# | +--< driver/built-in.o mm/built-in.o + more 656# | 657# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 658# 659# vmlinux version (uname -v) cannot be updated during normal 660# descending-into-subdirs phase since we do not yet know if we need to 661# update vmlinux. 662# Therefore this step is delayed until just before final link of vmlinux - 663# except in the kallsyms case where it is done just before adding the 664# symbols to the kernel. 665# 666# System.map is generated to document addresses of all kernel symbols 667 668vmlinux-init := $(head-y) $(init-y) 669vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 670vmlinux-all := $(vmlinux-init) $(vmlinux-main) 671vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 672export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 673 674# Rule to link vmlinux - also used during CONFIG_KALLSYMS 675# May be overridden by arch/$(ARCH)/Makefile 676quiet_cmd_vmlinux__ ?= LD $@ 677 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 678 -T $(vmlinux-lds) $(vmlinux-init) \ 679 --start-group $(vmlinux-main) --end-group \ 680 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 681 682# Generate new vmlinux version 683quiet_cmd_vmlinux_version = GEN .version 684 cmd_vmlinux_version = set -e; \ 685 if [ ! -r .version ]; then \ 686 rm -f .version; \ 687 echo 1 >.version; \ 688 else \ 689 mv .version .old_version; \ 690 expr 0$$(cat .old_version) + 1 >.version; \ 691 fi; \ 692 $(MAKE) $(build)=init 693 694# Generate System.map 695quiet_cmd_sysmap = SYSMAP 696 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 697 698# Link of vmlinux 699# If CONFIG_KALLSYMS is set .version is already updated 700# Generate System.map and verify that the content is consistent 701# Use + in front of the vmlinux_version rule to silent warning with make -j2 702# First command is ':' to allow us to use + in front of the rule 703define rule_vmlinux__ 704 : 705 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 706 707 $(call cmd,vmlinux__) 708 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 709 710 $(Q)$(if $($(quiet)cmd_sysmap), \ 711 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 712 $(cmd_sysmap) $@ System.map; \ 713 if [ $$? -ne 0 ]; then \ 714 rm -f $@; \ 715 /bin/false; \ 716 fi; 717 $(verify_kallsyms) 718endef 719 720 721ifdef CONFIG_KALLSYMS 722# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 723# It's a three stage process: 724# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 725# empty 726# Running kallsyms on that gives us .tmp_kallsyms1.o with 727# the right size - vmlinux version (uname -v) is updated during this step 728# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 729# but due to the added section, some addresses have shifted. 730# From here, we generate a correct .tmp_kallsyms2.o 731# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 732# o Verify that the System.map from vmlinux matches the map from 733# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 734# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 735# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 736# temporary bypass to allow the kernel to be built while the 737# maintainers work out what went wrong with kallsyms. 738 739ifdef CONFIG_KALLSYMS_EXTRA_PASS 740last_kallsyms := 3 741else 742last_kallsyms := 2 743endif 744 745kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 746 747define verify_kallsyms 748 $(Q)$(if $($(quiet)cmd_sysmap), \ 749 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 750 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 751 $(Q)cmp -s System.map .tmp_System.map || \ 752 (echo Inconsistent kallsyms data; \ 753 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 754 rm .tmp_kallsyms* ; /bin/false ) 755endef 756 757# Update vmlinux version before link 758# Use + in front of this rule to silent warning about make -j1 759# First command is ':' to allow us to use + in front of this rule 760cmd_ksym_ld = $(cmd_vmlinux__) 761define rule_ksym_ld 762 : 763 +$(call cmd,vmlinux_version) 764 $(call cmd,vmlinux__) 765 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 766endef 767 768# Generate .S file with all kernel symbols 769quiet_cmd_kallsyms = KSYM $@ 770 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 771 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 772 773.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 774 $(call if_changed_dep,as_o_S) 775 776.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 777 $(call cmd,kallsyms) 778 779# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 780.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 781 $(call if_changed_rule,ksym_ld) 782 783.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 784 $(call if_changed,vmlinux__) 785 786.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 787 $(call if_changed,vmlinux__) 788 789# Needs to visit scripts/ before $(KALLSYMS) can be used. 790$(KALLSYMS): scripts ; 791 792# Generate some data for debugging strange kallsyms problems 793debug_kallsyms: .tmp_map$(last_kallsyms) 794 795.tmp_map%: .tmp_vmlinux% FORCE 796 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 797 798.tmp_map3: .tmp_map2 799 800.tmp_map2: .tmp_map1 801 802endif # ifdef CONFIG_KALLSYMS 803 804# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 805# relevant sections renamed as per the linker script. 806quiet_cmd_vmlinux-modpost = LD $@ 807 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 808 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 809 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 810define rule_vmlinux-modpost 811 : 812 +$(call cmd,vmlinux-modpost) 813 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 814 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 815endef 816 817# vmlinux image - including updated kernel symbols 818vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 819ifdef CONFIG_HEADERS_CHECK 820 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 821endif 822ifdef CONFIG_SAMPLES 823 $(Q)$(MAKE) $(build)=samples 824endif 825ifdef CONFIG_BUILD_DOCSRC 826 $(Q)$(MAKE) $(build)=Documentation 827endif 828 $(call vmlinux-modpost) 829 $(call if_changed_rule,vmlinux__) 830 $(Q)rm -f .old_version 831 832# build vmlinux.o first to catch section mismatch errors early 833ifdef CONFIG_KALLSYMS 834.tmp_vmlinux1: vmlinux.o 835endif 836 837modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 838vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 839 $(call if_changed_rule,vmlinux-modpost) 840 841# The actual objects are generated when descending, 842# make sure no implicit rule kicks in 843$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 844 845# Handle descending into subdirectories listed in $(vmlinux-dirs) 846# Preset locale variables to speed up the build process. Limit locale 847# tweaks to this spot to avoid wrong language settings when running 848# make menuconfig etc. 849# Error messages still appears in the original language 850 851PHONY += $(vmlinux-dirs) 852$(vmlinux-dirs): prepare scripts 853 $(Q)$(MAKE) $(build)=$@ 854 855# Build the kernel release string 856# 857# The KERNELRELEASE value built here is stored in the file 858# include/config/kernel.release, and is used when executing several 859# make targets, such as "make install" or "make modules_install." 860# 861# The eventual kernel release string consists of the following fields, 862# shown in a hierarchical format to show how smaller parts are concatenated 863# to form the larger and final value, with values coming from places like 864# the Makefile, kernel config options, make command line options and/or 865# SCM tag information. 866# 867# $(KERNELVERSION) 868# $(VERSION) eg, 2 869# $(PATCHLEVEL) eg, 6 870# $(SUBLEVEL) eg, 18 871# $(EXTRAVERSION) eg, -rc6 872# $(localver-full) 873# $(localver) 874# localversion* (files without backups, containing '~') 875# $(CONFIG_LOCALVERSION) (from kernel config setting) 876# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 877# ./scripts/setlocalversion (SCM tag, if one exists) 878# $(LOCALVERSION) (from make command line if provided) 879# 880# Note how the final $(localver-auto) string is included *only* if the 881# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 882# moment, only git is supported but other SCMs can edit the script 883# scripts/setlocalversion and add the appropriate checks as needed. 884 885pattern = ".*/localversion[^~]*" 886string = $(shell cat /dev/null \ 887 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 888 889localver = $(subst $(space),, $(string) \ 890 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 891 892# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 893# and if the SCM is know a tag from the SCM is appended. 894# The appended tag is determined by the SCM used. 895# 896# Currently, only git is supported. 897# Other SCMs can edit scripts/setlocalversion and add the appropriate 898# checks as needed. 899ifdef CONFIG_LOCALVERSION_AUTO 900 _localver-auto = $(shell $(CONFIG_SHELL) \ 901 $(srctree)/scripts/setlocalversion $(srctree)) 902 localver-auto = $(LOCALVERSION)$(_localver-auto) 903endif 904 905localver-full = $(localver)$(localver-auto) 906 907# Store (new) KERNELRELASE string in include/config/kernel.release 908kernelrelease = $(KERNELVERSION)$(localver-full) 909include/config/kernel.release: include/config/auto.conf FORCE 910 $(Q)rm -f $@ 911 $(Q)echo $(kernelrelease) > $@ 912 913 914# Things we need to do before we recursively start building the kernel 915# or the modules are listed in "prepare". 916# A multi level approach is used. prepareN is processed before prepareN-1. 917# archprepare is used in arch Makefiles and when processed asm symlink, 918# version.h and scripts_basic is processed / created. 919 920# Listed in dependency order 921PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 922 923# prepare3 is used to check if we are building in a separate output directory, 924# and if so do: 925# 1) Check that make has not been executed in the kernel src $(srctree) 926# 2) Create the include2 directory, used for the second asm symlink 927prepare3: include/config/kernel.release 928ifneq ($(KBUILD_SRC),) 929 @echo ' Using $(srctree) as source for kernel' 930 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 931 echo " $(srctree) is not clean, please run 'make mrproper'";\ 932 echo " in the '$(srctree)' directory.";\ 933 /bin/false; \ 934 fi; 935 $(Q)if [ ! -d include2 ]; then \ 936 mkdir -p include2; \ 937 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 938 fi 939endif 940 941# prepare2 creates a makefile if using a separate output directory 942prepare2: prepare3 outputmakefile 943 944prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 945 include/asm include/config/auto.conf 946 $(cmd_crmodverdir) 947 948archprepare: prepare1 scripts_basic 949 950prepare0: archprepare FORCE 951 $(Q)$(MAKE) $(build)=. 952 $(Q)$(MAKE) $(build)=. missing-syscalls 953 954# All the preparing.. 955prepare: prepare0 956 957# Leave this as default for preprocessing vmlinux.lds.S, which is now 958# done in arch/$(ARCH)/kernel/Makefile 959 960export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 961 962# The asm symlink changes when $(ARCH) changes. 963# Detect this and ask user to run make mrproper 964# If asm is a stale symlink (point to dir that does not exist) remove it 965define check-symlink 966 set -e; \ 967 if [ -L include/asm ]; then \ 968 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 969 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 970 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 971 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 972 exit 1; \ 973 fi; \ 974 test -e $$asmlink || rm include/asm; \ 975 elif [ -d include/asm ]; then \ 976 echo "ERROR: $@ is a directory but a symlink was expected";\ 977 exit 1; \ 978 fi 979endef 980 981# We create the target directory of the symlink if it does 982# not exist so the test in chack-symlink works and we have a 983# directory for generated filesas used by some architectures. 984define create-symlink 985 if [ ! -L include/asm ]; then \ 986 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 987 if [ ! -d include/asm-$(SRCARCH) ]; then \ 988 mkdir -p include/asm-$(SRCARCH); \ 989 fi; \ 990 ln -fsn asm-$(SRCARCH) $@; \ 991 fi 992endef 993 994include/asm: FORCE 995 $(Q)$(check-symlink) 996 $(Q)$(create-symlink) 997 998# Generate some files 999# --------------------------------------------------------------------------- 1000

1001# KERNELRELEASE can change from a few different places, meaning version.h 1002# needs to be updated, so this check is forced on all builds 1003 1004uts_len := 64 1005define filechk_utsrelease.h 1006 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1007 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1008 exit 1; \ 1009 fi; \ 1010 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1011endef 1012 1013define filechk_version.h 1014 (echo \#define LINUX_VERSION_CODE $(shell \ 1015 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1016 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1017endef 1018 1019include/linux/version.h: $(srctree)/Makefile FORCE 1020 $(call filechk,version.h) 1021 1022include/linux/utsrelease.h: include/config/kernel.release FORCE 1023 $(call filechk,utsrelease.h) 1024 1025# --------------------------------------------------------------------------- 1026 1027PHONY += depend dep 1028depend dep: 1029 @echo '*** Warning: make $@ is unnecessary now.' 1030 1031# --------------------------------------------------------------------------- 1032# Firmware install 1033INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1034export INSTALL_FW_PATH 1035 1036PHONY += firmware_install 1037firmware_install: FORCE 1038 @mkdir -p $(objtree)/firmware 1039 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1040 1041# --------------------------------------------------------------------------- 1042# Kernel headers 1043 1044#Default location for installed headers 1045export INSTALL_HDR_PATH = $(objtree)/usr 1046 1047hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1048# Find out where the Kbuild file is located to support 1049# arch/$(ARCH)/include/asm 1050hdr-dir = $(strip \ 1051 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1052 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1053 1054# If we do an all arch process set dst to asm-$(hdr-arch) 1055hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1056 1057PHONY += __headers 1058__headers: include/linux/version.h scripts_basic FORCE 1059 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1060 1061PHONY += headers_install_all 1062headers_install_all: 1063 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1064 1065PHONY += headers_install 1066headers_install: __headers 1067 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1068 $(error Headers not exportable for the $(SRCARCH) architecture)) 1069 $(Q)$(MAKE) $(hdr-inst)=include 1070 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1071 1072PHONY += headers_check_all 1073headers_check_all: headers_install_all 1074 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1075 1076PHONY += headers_check 1077headers_check: headers_install 1078 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1079 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1080 1081# --------------------------------------------------------------------------- 1082# Modules 1083 1084ifdef CONFIG_MODULES 1085 1086# By default, build modules as well 1087 1088all: modules 1089 1090# Build modules 1091# 1092# A module can be listed more than once in obj-m resulting in 1093# duplicate lines in modules.order files. Those are removed 1094# using awk while concatenating to the final file. 1095 1096PHONY += modules 1097modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1098 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1099 @echo ' Building modules, stage 2.'; 1100 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1101 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1102 1103 1104# Target to prepare building external modules 1105PHONY += modules_prepare 1106modules_prepare: prepare scripts 1107 1108# Target to install modules 1109PHONY += modules_install 1110modules_install: _modinst_ _modinst_post 1111 1112PHONY += _modinst_ 1113_modinst_: 1114 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1115 echo "Warning: you may need to install module-init-tools"; \ 1116 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1117 sleep 1; \ 1118 fi 1119 @rm -rf $(MODLIB)/kernel 1120 @rm -f $(MODLIB)/source 1121 @mkdir -p $(MODLIB)/kernel 1122 @ln -s $(srctree) $(MODLIB)/source 1123 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1124 rm -f $(MODLIB)/build ; \ 1125 ln -s $(objtree) $(MODLIB)/build ; \ 1126 fi 1127 @cp -f $(objtree)/modules.order $(MODLIB)/ 1128 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1129 1130# This depmod is only for convenience to give the initial 1131# boot a modules.dep even before / is mounted read-write. However the 1132# boot script depmod is the master version. 1133PHONY += _modinst_post 1134_modinst_post: _modinst_ 1135 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1136 $(call cmd,depmod) 1137 1138else # CONFIG_MODULES 1139 1140# Modules not configured 1141# --------------------------------------------------------------------------- 1142 1143modules modules_install: FORCE 1144 @echo 1145 @echo "The present kernel configuration has modules disabled." 1146 @echo "Type 'make config' and enable loadable module support." 1147 @echo "Then build a kernel with module support enabled." 1148 @echo 1149 @exit 1 1150 1151endif # CONFIG_MODULES 1152 1153### 1154# Cleaning is done on three levels. 1155# make clean Delete most generated files 1156# Leave enough to build external modules 1157# make mrproper Delete the current configuration, and all generated files 1158# make distclean Remove editor backup files, patch leftover files and the like 1159 1160# Directories & files removed with 'make clean' 1161CLEAN_DIRS += $(MODVERDIR) 1162CLEAN_FILES += vmlinux System.map \ 1163 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1164 1165# Directories & files removed with 'make mrproper' 1166MRPROPER_DIRS += include/config include2 usr/include 1167MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1168 include/linux/autoconf.h include/linux/version.h \ 1169 include/linux/utsrelease.h \ 1170 include/linux/bounds.h include/asm*/asm-offsets.h \ 1171 Module.symvers Module.markers tags TAGS cscope* 1172 1173# clean - Delete most, but leave enough to build external modules 1174# 1175clean: rm-dirs := $(CLEAN_DIRS) 1176clean: rm-files := $(CLEAN_FILES) 1177clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1178 1179PHONY += $(clean-dirs) clean archclean 1180$(clean-dirs): 1181 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1182 1183clean: archclean $(clean-dirs) 1184 $(call cmd,rmdirs) 1185 $(call cmd,rmfiles) 1186 @find . $(RCS_FIND_IGNORE) \ 1187 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1188 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1189 -o -name '*.symtypes' -o -name 'modules.order' \ 1190 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1191 -type f -print | xargs rm -f 1192 1193# mrproper - Delete all generated files, including .config 1194# 1195mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1196mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1197mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1198 1199PHONY += $(mrproper-dirs) mrproper archmrproper 1200$(mrproper-dirs): 1201 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1202 1203mrproper: clean archmrproper $(mrproper-dirs) 1204 $(call cmd,rmdirs) 1205 $(call cmd,rmfiles) 1206 1207# distclean 1208# 1209PHONY += distclean 1210 1211distclean: mrproper 1212 @find $(srctree) $(RCS_FIND_IGNORE) \ 1213 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1214 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1215 -o -name '.*.rej' -o -size 0 \ 1216 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1217 -type f -print | xargs rm -f 1218 1219 1220# Packaging of the kernel to various formats 1221# --------------------------------------------------------------------------- 1222# rpm target kept for backward compatibility 1223package-dir := $(srctree)/scripts/package 1224 1225%pkg: include/config/kernel.release FORCE 1226 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1227rpm: include/config/kernel.release FORCE 1228 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1229 1230 1231# Brief documentation of the typical targets used 1232# --------------------------------------------------------------------------- 1233 1234boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1235boards := $(notdir $(boards)) 1236board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1237board-dirs := $(sort $(notdir $(board-dirs:/=))) 1238 1239help: 1240 @echo 'Cleaning targets:' 1241 @echo ' clean - Remove most generated files but keep the config and' 1242 @echo ' enough build support to build external modules' 1243 @echo ' mrproper - Remove all generated files + config + various backup files' 1244 @echo ' distclean - mrproper + remove editor backup and patch files' 1245 @echo '' 1246 @echo 'Configuration targets:' 1247 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1248 @echo '' 1249 @echo 'Other generic targets:' 1250 @echo ' all - Build all targets marked with [*]' 1251 @echo '* vmlinux - Build the bare kernel' 1252 @echo '* modules - Build all modules' 1253 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1254 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1255 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1256 @echo ' dir/ - Build all files in dir and below' 1257 @echo ' dir/file.[ois] - Build specified target only' 1258 @echo ' dir/file.ko - Build module including final link' 1259 @echo ' prepare - Set up for building external modules' 1260 @echo ' tags/TAGS - Generate tags file for editors' 1261 @echo ' cscope - Generate cscope index' 1262 @echo ' kernelrelease - Output the release version string' 1263 @echo ' kernelversion - Output the version stored in Makefile' 1264 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1265 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1266 echo '' 1267 @echo 'Static analysers' 1268 @echo ' checkstack - Generate a list of stack hogs' 1269 @echo ' namespacecheck - Name space analysis on compiled kernel' 1270 @echo ' versioncheck - Sanity check on version.h usage' 1271 @echo ' includecheck - Check for duplicate included header files' 1272 @echo ' export_report - List the usages of all exported symbols' 1273 @echo ' headers_check - Sanity check on exported headers'; \ 1274 echo '' 1275 @echo 'Kernel packaging:' 1276 @$(MAKE) $(build)=$(package-dir) help 1277 @echo '' 1278 @echo 'Documentation targets:' 1279 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1280 @echo '' 1281 @echo 'Architecture specific targets ($(SRCARCH)):' 1282 @$(if $(archhelp),$(archhelp),\ 1283 echo ' No architecture specific help defined for $(SRCARCH)') 1284 @echo '' 1285 @$(if $(boards), \ 1286 $(foreach b, $(boards), \ 1287 printf " %-24s - Build for %s\

" $(b) $(subst _defconfig,,$(b));) \ 1288 echo '') 1289 @$(if $(board-dirs), \ 1290 $(foreach b, $(board-dirs), \ 1291 printf " %-16s - Show %s-specific targets\

" help-$(b) $(b);) \ 1292 printf " %-16s - Show all of the above\

" help-boards; \ 1293 echo '') 1294 1295 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1296 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1297 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1298 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1299 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1300 @echo '' 1301 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1302 @echo 'For further info see the ./README file' 1303 1304 1305help-board-dirs := $(addprefix help-,$(board-dirs)) 1306 1307help-boards: $(help-board-dirs) 1308 1309boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1310 1311$(help-board-dirs): help-%: 1312 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1313 @$(if $(boards-per-dir), \ 1314 $(foreach b, $(boards-per-dir), \ 1315 printf " %-24s - Build for %s\

" $*/$(b) $(subst _defconfig,,$(b));) \ 1316 echo '') 1317 1318 1319# Documentation targets 1320# --------------------------------------------------------------------------- 1321%docs: scripts_basic FORCE 1322 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1323 1324else # KBUILD_EXTMOD 1325 1326### 1327# External module support. 1328# When building external modules the kernel used as basis is considered 1329# read-only, and no consistency checks are made and the make 1330# system is not used on the basis kernel. If updates are required 1331# in the basis kernel ordinary make commands (without M=...) must 1332# be used. 1333# 1334# The following are the only valid targets when building external 1335# modules. 1336# make M=dir clean Delete all automatically generated files 1337# make M=dir modules Make all modules in specified dir 1338# make M=dir Same as 'make M=dir modules' 1339# make M=dir modules_install 1340# Install the modules built in the module directory 1341# Assumes install directory is already created 1342 1343# We are always building modules 1344KBUILD_MODULES := 1 1345PHONY += crmodverdir 1346crmodverdir: 1347 $(cmd_crmodverdir) 1348 1349PHONY += $(objtree)/Module.symvers 1350$(objtree)/Module.symvers: 1351 @test -e $(objtree)/Module.symvers || ( \ 1352 echo; \ 1353 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1354 echo " is missing; modules will have no dependencies and modversions."; \ 1355 echo ) 1356 1357module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1358PHONY += $(module-dirs) modules 1359$(module-dirs): crmodverdir $(objtree)/Module.symvers 1360 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1361 1362modules: $(module-dirs) 1363 @echo ' Building modules, stage 2.'; 1364 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1365 1366PHONY += modules_install 1367modules_install: _emodinst_ _emodinst_post 1368 1369install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1370PHONY += _emodinst_ 1371_emodinst_: 1372 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1373 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1374 1375PHONY += _emodinst_post 1376_emodinst_post: _emodinst_ 1377 $(call cmd,depmod) 1378 1379clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1380 1381PHONY += $(clean-dirs) clean 1382$(clean-dirs): 1383 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1384 1385clean: rm-dirs := $(MODVERDIR) 1386clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1387clean: $(clean-dirs) 1388 $(call cmd,rmdirs) 1389 $(call cmd,rmfiles) 1390 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1391 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1392 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1393 -type f -print | xargs rm -f 1394 1395help: 1396 @echo ' Building external modules.' 1397 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1398 @echo '' 1399 @echo ' modules - default target, build the module(s)' 1400 @echo ' modules_install - install the module' 1401 @echo ' clean - remove generated files in module directory only' 1402 @echo '' 1403 1404# Dummies... 1405PHONY += prepare scripts 1406prepare: ; 1407scripts: ; 1408endif # KBUILD_EXTMOD 1409 1410# Generate tags for editors 1411# --------------------------------------------------------------------------- 1412 1413#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1414#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1415#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1416 1417ifeq ($(src),$(obj)) 1418__srctree = 1419else 1420__srctree = $(srctree)/ 1421endif 1422 1423ifeq ($(ALLSOURCE_ARCHS),) 1424ifeq ($(ARCH),um) 1425ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1426else 1427ALLINCLUDE_ARCHS := $(SRCARCH) 1428endif 1429else 1430#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1431ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1432endif 1433 1434ALLSOURCE_ARCHS := $(SRCARCH) 1435 1436define find-sources 1437 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1438 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1439 -wholename $(__srctree)arch/$${arch}/include/asm -type d -prune \ 1440 -o -name $1 -print; \ 1441 done ; \ 1442 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1443 -name $1 -print; \ 1444 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1445 \( -name config -o -name 'asm-*' \) -prune \ 1446 -o -name $1 -print; \ 1447 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1448 test -e $(__srctree)include/asm-$${arch} && \ 1449 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1450 -name $1 -print; \ 1451 test -e $(__srctree)arch/$${arch}/include/asm && \ 1452 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \ 1453 -name $1 -print; \ 1454 done ; \ 1455 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1456 -name $1 -print; \ 1457 find $(__srctree) $(RCS_FIND_IGNORE) \ 1458 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1459 -name $1 -print; \ 1460 ) 1461endef 1462 1463define all-sources 1464 $(call find-sources,'*.[chS]') 1465endef 1466define all-kconfigs 1467 $(call find-sources,'Kconfig*') 1468endef 1469define all-defconfigs 1470 $(call find-sources,'defconfig') 1471endef 1472 1473define xtags 1474 if $1 --version 2>&1 | grep -iq exuberant; then \ 1475 $(all-sources) | xargs $1 -a \ 1476 -I __initdata,__exitdata,__acquires,__releases \ 1477 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1478 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1479 --extra=+f --c-kinds=+px \ 1480 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1481 $(all-kconfigs) | xargs $1 -a \ 1482 --langdef=kconfig \ 1483 --language-force=kconfig \ 1484 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1485 $(all-defconfigs) | xargs -r $1 -a \ 1486 --langdef=dotconfig \ 1487 --language-force=dotconfig \ 1488 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1489 elif $1 --version 2>&1 | grep -iq emacs; then \ 1490 $(all-sources) | xargs $1 -a; \ 1491 $(all-kconfigs) | xargs $1 -a \ 1492 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1493 $(all-defconfigs) | xargs -r $1 -a \ 1494 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1495 else \ 1496 $(all-sources) | xargs $1 -a; \ 1497 fi 1498endef 1499 1500quiet_cmd_cscope-file = FILELST cscope.files 1501 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1502 1503quiet_cmd_cscope = MAKE cscope.out 1504 cmd_cscope = cscope -b -f cscope.out 1505 1506cscope: FORCE 1507 $(call cmd,cscope-file) 1508 $(call cmd,cscope) 1509 1510quiet_cmd_TAGS = MAKE $@ 1511define cmd_TAGS 1512 rm -f $@; \ 1513 $(call xtags,etags) 1514endef 1515 1516TAGS: FORCE 1517 $(call cmd,TAGS) 1518 1519quiet_cmd_tags = MAKE $@ 1520define cmd_tags 1521 rm -f $@; \ 1522 $(call xtags,ctags) 1523endef 1524 1525tags: FORCE 1526 $(call cmd,tags) 1527 1528 1529# Scripts to check various things for consistency 1530# --------------------------------------------------------------------------- 1531 1532includecheck: 1533 find * $(RCS_FIND_IGNORE) \ 1534 -name '*.[hcS]' -type f -print | sort \ 1535 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1536 1537versioncheck: 1538 find * $(RCS_FIND_IGNORE) \ 1539 -name '*.[hcS]' -type f -print | sort \ 1540 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1541 1542namespacecheck: 1543 $(PERL) $(srctree)/scripts/namespace.pl 1544 1545export_report: 1546 $(PERL) $(srctree)/scripts/export_report.pl 1547 1548endif #ifeq ($(config-targets),1) 1549endif #ifeq ($(mixed-targets),1) 1550 1551PHONY += checkstack kernelrelease kernelversion 1552 1553# UML needs a little special treatment here. It wants to use the host 1554# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1555# else wants $(ARCH), including people doing cross-builds, which means 1556# that $(SUBARCH) doesn't work here. 1557ifeq ($(ARCH), um) 1558CHECKSTACK_ARCH := $(SUBARCH) 1559else 1560CHECKSTACK_ARCH := $(ARCH) 1561endif 1562checkstack: 1563 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1564 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1565 1566kernelrelease: 1567 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1568 $(error kernelrelease not valid - run 'make prepare' to update it)) 1569kernelversion: 1570 @echo $(KERNELVERSION) 1571 1572# Single targets 1573# --------------------------------------------------------------------------- 1574# Single targets are compatible with: 1575# - build with mixed source and output 1576# - build with separate output dir 'make O=...' 1577# - external modules 1578# 1579# target-dir => where to store outputfile 1580# build-dir => directory in kernel source tree to use 1581 1582ifeq ($(KBUILD_EXTMOD),) 1583 build-dir = $(patsubst %/,%,$(dir $@)) 1584 target-dir = $(dir $@) 1585else 1586 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1587 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1588 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1589endif 1590 1591%.s: %.c prepare scripts FORCE 1592 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1593%.i: %.c prepare scripts FORCE 1594 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1595%.o: %.c prepare scripts FORCE 1596 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1597%.lst: %.c prepare scripts FORCE 1598 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1599%.s: %.S prepare scripts FORCE 1600 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1601%.o: %.S prepare scripts FORCE 1602 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1603%.symtypes: %.c prepare scripts FORCE 1604 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1605 1606# Modules 1607/ %/: prepare scripts FORCE 1608 $(cmd_crmodverdir) 1609 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1610 $(build)=$(build-dir) 1611%.ko: prepare scripts FORCE 1612 $(cmd_crmodverdir) 1613 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1614 $(build)=$(build-dir) $(@:.ko=.o) 1615 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1616 1617# FIXME Should go into a make.lib or something 1618# =========================================================================== 1619 1620quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1621 cmd_rmdirs = rm -rf $(rm-dirs) 1622 1623quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1624 cmd_rmfiles = rm -f $(rm-files) 1625 1626# Run depmod only if we have System.map and depmod is executable 1627quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1628 cmd_depmod = \ 1629 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1630 $(DEPMOD) -ae -F System.map \ 1631 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1632 $(KERNELRELEASE); \ 1633 fi 1634 1635# Create temporary dir for module support files 1636# clean it up only when building all modules 1637cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1638 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1639 1640a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1641 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1642 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1643 1644quiet_cmd_as_o_S = AS $@ 1645cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1646 1647# read all saved command lines 1648 1649targets := $(wildcard $(sort $(targets))) 1650cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1651 1652ifneq ($(cmd_files),) 1653 $(cmd_files): ; # Do not try to update included dependency files 1654 include $(cmd_files) 1655endif 1656 1657# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1658# Usage: 1659# $(Q)$(MAKE) $(clean)=dir 1660clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1661 1662endif # skip-makefile 1663 1664PHONY += FORCE 1665FORCE: 1666 1667# Declare the contents of the .PHONY variable as phony. We keep that 1668# information in a variable se we can use it in if_changed and friends. 1669.PHONY: $(PHONY) 1670