1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 24 4EXTRAVERSION = 5NAME = Arr Matey! A Hairy Bilge Rat! 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 192 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 208KCONFIG_CONFIG ?= .config 209 210# SHELL used by kbuild 211CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 212 else if [ -x /bin/bash ]; then echo /bin/bash; \ 213 else echo sh; fi ; fi) 214 215HOSTCC = gcc 216HOSTCXX = g++ 217HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 218HOSTCXXFLAGS = -O2 219 220# Decide whether to build built-in, modular, or both. 221# Normally, just do built-in. 222 223KBUILD_MODULES := 224KBUILD_BUILTIN := 1 225 226# If we have only "make modules", don't compile built-in objects. 227# When we're building modules with modversions, we need to consider 228# the built-in objects during the descend as well, in order to 229# make sure the checksums are up to date before we record them. 230 231ifeq ($(MAKECMDGOALS),modules) 232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 233endif 234 235# If we have "make <whatever> modules", compile modules 236# in addition to whatever we do anyway. 237# Just "make" or "make all" shall build modules as well 238 239ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 240 KBUILD_MODULES := 1 241endif 242 243ifeq ($(MAKECMDGOALS),) 244 KBUILD_MODULES := 1 245endif 246 247export KBUILD_MODULES KBUILD_BUILTIN 248export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 249 250# Beautify output 251# --------------------------------------------------------------------------- 252# 253# Normally, we echo the whole command before executing it. By making 254# that echo $($(quiet)$(cmd)), we now have the possibility to set 255# $(quiet) to choose other forms of output instead, e.g. 256# 257# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 258# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 259# 260# If $(quiet) is empty, the whole command will be printed. 261# If it is set to "quiet_", only the short version will be printed. 262# If it is set to "silent_", nothing will be printed at all, since 263# the variable $(silent_cmd_cc_o_c) doesn't exist. 264# 265# A simple variant is to prefix commands with $(Q) - that's useful 266# for commands that shall be hidden in non-verbose mode. 267# 268# $(Q)ln $@ :< 269# 270# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 271# If KBUILD_VERBOSE equals 1 then the above command is displayed. 272 273ifeq ($(KBUILD_VERBOSE),1) 274 quiet = 275 Q = 276else 277 quiet=quiet_ 278 Q = @ 279endif 280 281# If the user is running make -s (silent mode), suppress echoing of 282# commands 283 284ifneq ($(findstring s,$(MAKEFLAGS)),) 285 quiet=silent_ 286endif 287 288export quiet Q KBUILD_VERBOSE 289 290 291# Look for make include files relative to root of kernel src 292MAKEFLAGS += --include-dir=$(srctree) 293 294# We need some generic definitions (do not try to remake the file). 295$(srctree)/scripts/Kbuild.include: ; 296include $(srctree)/scripts/Kbuild.include 297 298# Make variables (CC, etc...) 299 300AS = $(CROSS_COMPILE)as 301LD = $(CROSS_COMPILE)ld 302CC = $(CROSS_COMPILE)gcc 303CPP = $(CC) -E 304AR = $(CROSS_COMPILE)ar 305NM = $(CROSS_COMPILE)nm 306STRIP = $(CROSS_COMPILE)strip 307OBJCOPY = $(CROSS_COMPILE)objcopy 308OBJDUMP = $(CROSS_COMPILE)objdump 309AWK = awk 310GENKSYMS = scripts/genksyms/genksyms 311DEPMOD = /sbin/depmod 312KALLSYMS = scripts/kallsyms 313PERL = perl 314CHECK = sparse 315 316CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 317MODFLAGS = -DMODULE 318CFLAGS_MODULE = $(MODFLAGS) 319AFLAGS_MODULE = $(MODFLAGS) 320LDFLAGS_MODULE = 321CFLAGS_KERNEL = 322AFLAGS_KERNEL = 323 324 325# Use LINUXINCLUDE when you must reference the include/ directory. 326# Needed to be compatible with the O= option 327LINUXINCLUDE := -Iinclude \ 328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 329 -include include/linux/autoconf.h 330 331KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 332 333KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 334 -fno-strict-aliasing -fno-common \ 335 -Werror-implicit-function-declaration 336KBUILD_AFLAGS := -D__ASSEMBLY__ 337 338# Read KERNELRELEASE from include/config/kernel.release (if it exists) 339KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 340KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 341 342export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 343export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 344export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 345export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 346 347export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 348export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 349export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 350 351# When compiling out-of-tree modules, put MODVERDIR in the module 352# tree rather than in the kernel tree. The kernel tree might 353# even be read-only. 354export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 355 356# Files to ignore in find ... statements 357 358RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 359export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 360 361# =========================================================================== 362# Rules shared between *config targets and build targets 363 364# Basic helpers built in scripts/ 365PHONY += scripts_basic 366scripts_basic: 367 $(Q)$(MAKE) $(build)=scripts/basic 368 369# To avoid any implicit rule to kick in, define an empty command. 370scripts/basic/%: scripts_basic ; 371 372PHONY += outputmakefile 373# outputmakefile generates a Makefile in the output directory, if using a 374# separate output directory. This allows convenient use of make in the 375# output directory. 376outputmakefile: 377ifneq ($(KBUILD_SRC),) 378 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 379 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 380endif 381 382# To make sure we do not include .config for any of the *config targets 383# catch them early, and hand them over to scripts/kconfig/Makefile 384# It is allowed to specify more targets when calling make, including 385# mixing *config targets and build targets. 386# For example 'make oldconfig all'. 387# Detect when mixed targets is specified, and make a second invocation 388# of make so .config is not included in this case either (for *config). 389 390no-dot-config-targets := clean mrproper distclean \ 391 cscope TAGS tags help %docs check% \ 392 include/linux/version.h headers_% \ 393 kernelrelease kernelversion 394 395config-targets := 0 396mixed-targets := 0 397dot-config := 1 398 399ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 400 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 401 dot-config := 0 402 endif 403endif 404 405ifeq ($(KBUILD_EXTMOD),) 406 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 407 config-targets := 1 408 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 409 mixed-targets := 1 410 endif 411 endif 412endif 413 414ifeq ($(mixed-targets),1) 415# =========================================================================== 416# We're called with mixed targets (*config and build targets). 417# Handle them one by one. 418 419%:: FORCE 420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 421 422else 423ifeq ($(config-targets),1) 424# =========================================================================== 425# *config targets only - make sure prerequisites are updated, and descend 426# in scripts/kconfig to make the *config target 427 428# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 429# KBUILD_DEFCONFIG may point out an alternative default configuration 430# used for 'make defconfig' 431include $(srctree)/arch/$(SRCARCH)/Makefile 432export KBUILD_DEFCONFIG 433 434config %config: scripts_basic outputmakefile FORCE 435 $(Q)mkdir -p include/linux include/config 436 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 437 438else 439# =========================================================================== 440# Build targets only - this includes vmlinux, arch specific targets, clean 441# targets and others. In general all targets except *config targets. 442 443ifeq ($(KBUILD_EXTMOD),) 444# Additional helpers built in scripts/ 445# Carefully list dependencies so we do not try to build scripts twice 446# in parallel 447PHONY += scripts 448scripts: scripts_basic include/config/auto.conf 449 $(Q)$(MAKE) $(build)=$(@) 450 451# Objects we will link into vmlinux / subdirs we need to visit 452init-y := init/ 453drivers-y := drivers/ sound/ 454net-y := net/ 455libs-y := lib/ 456core-y := usr/ 457endif # KBUILD_EXTMOD 458 459ifeq ($(dot-config),1) 460# Read in config 461-include include/config/auto.conf 462 463ifeq ($(KBUILD_EXTMOD),) 464# Read in dependencies to all Kconfig* files, make sure to run 465# oldconfig if changes are detected. 466-include include/config/auto.conf.cmd 467 468# To avoid any implicit rule to kick in, define an empty command 469$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 470 471# If .config is newer than include/config/auto.conf, someone tinkered 472# with it and forgot to run make oldconfig. 473# if auto.conf.cmd is missing then we are probably in a cleaned tree so 474# we execute the config step to be sure to catch updated Kconfig files 475include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 476 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 477else 478# external modules needs include/linux/autoconf.h and include/config/auto.conf 479# but do not care if they are up-to-date. Use auto.conf to trigger the test 480PHONY += include/config/auto.conf 481 482include/config/auto.conf: 483 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 484 echo; \ 485 echo " ERROR: Kernel configuration is invalid."; \ 486 echo " include/linux/autoconf.h or $@ are missing."; \ 487 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 488 echo; \ 489 /bin/false) 490 491endif # KBUILD_EXTMOD 492 493else 494# Dummy target needed, because used as prerequisite 495include/config/auto.conf: ; 496endif # $(dot-config) 497 498# The all: target is the default when no target is given on the 499# command line. 500# This allow a user to issue only 'make' to build a kernel including modules 501# Defaults vmlinux but it is usually overridden in the arch makefile 502all: vmlinux 503 504ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 505KBUILD_CFLAGS += -Os 506else 507KBUILD_CFLAGS += -O2 508endif 509 510include $(srctree)/arch/$(SRCARCH)/Makefile 511 512ifdef CONFIG_FRAME_POINTER 513KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 514else 515KBUILD_CFLAGS += -fomit-frame-pointer 516endif 517 518ifdef CONFIG_DEBUG_INFO 519KBUILD_CFLAGS += -g 520KBUILD_AFLAGS += -gdwarf-2 521endif 522 523# We trigger additional mismatches with less inlining 524ifdef CONFIG_DEBUG_SECTION_MISMATCH 525KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 526endif 527 528# Force gcc to behave correct even for buggy distributions 529KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 530 531# arch Makefile may override CC so keep this after arch Makefile is included 532NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 533CHECKFLAGS += $(NOSTDINC_FLAGS) 534 535# warn about C99 declaration after statement 536KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 537 538# disable pointer signed / unsigned warnings in gcc 4.0 539KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 540 541# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 542# But warn user when we do so 543warn-assign = \ 544$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 545 546ifneq ($(KCPPFLAGS),) 547 $(call warn-assign,CPPFLAGS) 548 KBUILD_CPPFLAGS += $(KCPPFLAGS) 549endif 550ifneq ($(KAFLAGS),) 551 $(call warn-assign,AFLAGS) 552 KBUILD_AFLAGS += $(KAFLAGS) 553endif 554ifneq ($(KCFLAGS),) 555 $(call warn-assign,CFLAGS) 556 KBUILD_CFLAGS += $(KCFLAGS) 557endif 558 559# Use --build-id when available. 560LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 561 $(call ld-option, -Wl$(comma)--build-id,)) 562LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 563LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 564 565# Default kernel image to build when no specific target is given. 566# KBUILD_IMAGE may be overruled on the command line or 567# set in the environment 568# Also any assignments in arch/$(ARCH)/Makefile take precedence over 569# this default value 570export KBUILD_IMAGE ?= vmlinux 571 572# 573# INSTALL_PATH specifies where to place the updated kernel and system map 574# images. Default is /boot, but you can set it to other values 575export INSTALL_PATH ?= /boot 576 577# 578# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 579# relocations required by build roots. This is not defined in the 580# makefile but the argument can be passed to make if needed. 581# 582 583MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 584export MODLIB 585 586# 587# INSTALL_MOD_STRIP, if defined, will cause modules to be 588# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 589# the default option --strip-debug will be used. Otherwise, 590# INSTALL_MOD_STRIP will used as the options to the strip command. 591 592ifdef INSTALL_MOD_STRIP 593ifeq ($(INSTALL_MOD_STRIP),1) 594mod_strip_cmd = $(STRIP) --strip-debug 595else 596mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 597endif # INSTALL_MOD_STRIP=1 598else 599mod_strip_cmd = true 600endif # INSTALL_MOD_STRIP 601export mod_strip_cmd 602 603 604ifeq ($(KBUILD_EXTMOD),) 605core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 606 607vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 608 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 609 $(net-y) $(net-m) $(libs-y) $(libs-m))) 610 611vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 612 $(init-n) $(init-) \ 613 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 614 $(net-n) $(net-) $(libs-n) $(libs-)))) 615 616init-y := $(patsubst %/, %/built-in.o, $(init-y)) 617core-y := $(patsubst %/, %/built-in.o, $(core-y)) 618drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 619net-y := $(patsubst %/, %/built-in.o, $(net-y)) 620libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 621libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 622libs-y := $(libs-y1) $(libs-y2) 623 624# Build vmlinux 625# --------------------------------------------------------------------------- 626# vmlinux is built from the objects selected by $(vmlinux-init) and 627# $(vmlinux-main). Most are built-in.o files from top-level directories 628# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 629# Ordering when linking is important, and $(vmlinux-init) must be first. 630# 631# vmlinux 632# ^ 633# | 634# +-< $(vmlinux-init) 635# | +--< init/version.o + more 636# | 637# +--< $(vmlinux-main) 638# | +--< driver/built-in.o mm/built-in.o + more 639# | 640# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 641# 642# vmlinux version (uname -v) cannot be updated during normal 643# descending-into-subdirs phase since we do not yet know if we need to 644# update vmlinux. 645# Therefore this step is delayed until just before final link of vmlinux - 646# except in the kallsyms case where it is done just before adding the 647# symbols to the kernel. 648# 649# System.map is generated to document addresses of all kernel symbols 650 651vmlinux-init := $(head-y) $(init-y) 652vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 653vmlinux-all := $(vmlinux-init) $(vmlinux-main) 654vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 655export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 656 657# Rule to link vmlinux - also used during CONFIG_KALLSYMS 658# May be overridden by arch/$(ARCH)/Makefile 659quiet_cmd_vmlinux__ ?= LD $@ 660 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 661 -T $(vmlinux-lds) $(vmlinux-init) \ 662 --start-group $(vmlinux-main) --end-group \ 663 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 664 665# Generate new vmlinux version 666quiet_cmd_vmlinux_version = GEN .version 667 cmd_vmlinux_version = set -e; \ 668 if [ ! -r .version ]; then \ 669 rm -f .version; \ 670 echo 1 >.version; \ 671 else \ 672 mv .version .old_version; \ 673 expr 0$$(cat .old_version) + 1 >.version; \ 674 fi; \ 675 $(MAKE) $(build)=init 676 677# Generate System.map 678quiet_cmd_sysmap = SYSMAP 679 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 680 681# Link of vmlinux 682# If CONFIG_KALLSYMS is set .version is already updated 683# Generate System.map and verify that the content is consistent 684# Use + in front of the vmlinux_version rule to silent warning with make -j2 685# First command is ':' to allow us to use + in front of the rule 686define rule_vmlinux__ 687 : 688 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 689 690 $(call cmd,vmlinux__) 691 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 692 693 $(Q)$(if $($(quiet)cmd_sysmap), \ 694 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 695 $(cmd_sysmap) $@ System.map; \ 696 if [ $$? -ne 0 ]; then \ 697 rm -f $@; \ 698 /bin/false; \ 699 fi; 700 $(verify_kallsyms) 701endef 702 703 704ifdef CONFIG_KALLSYMS 705# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 706# It's a three stage process: 707# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 708# empty 709# Running kallsyms on that gives us .tmp_kallsyms1.o with 710# the right size - vmlinux version (uname -v) is updated during this step 711# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 712# but due to the added section, some addresses have shifted. 713# From here, we generate a correct .tmp_kallsyms2.o 714# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 715# o Verify that the System.map from vmlinux matches the map from 716# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 717# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 718# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 719# temporary bypass to allow the kernel to be built while the 720# maintainers work out what went wrong with kallsyms. 721 722ifdef CONFIG_KALLSYMS_EXTRA_PASS 723last_kallsyms := 3 724else 725last_kallsyms := 2 726endif 727 728kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 729 730define verify_kallsyms 731 $(Q)$(if $($(quiet)cmd_sysmap), \ 732 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 733 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 734 $(Q)cmp -s System.map .tmp_System.map || \ 735 (echo Inconsistent kallsyms data; \ 736 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 737 rm .tmp_kallsyms* ; /bin/false ) 738endef 739 740# Update vmlinux version before link 741# Use + in front of this rule to silent warning about make -j1 742# First command is ':' to allow us to use + in front of this rule 743cmd_ksym_ld = $(cmd_vmlinux__) 744define rule_ksym_ld 745 : 746 +$(call cmd,vmlinux_version) 747 $(call cmd,vmlinux__) 748 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 749endef 750 751# Generate .S file with all kernel symbols 752quiet_cmd_kallsyms = KSYM $@ 753 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 754 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 755 756.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 757 $(call if_changed_dep,as_o_S) 758 759.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 760 $(call cmd,kallsyms) 761 762# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 763.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 764 $(call if_changed_rule,ksym_ld) 765 766.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 767 $(call if_changed,vmlinux__) 768 769.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 770 $(call if_changed,vmlinux__) 771 772# Needs to visit scripts/ before $(KALLSYMS) can be used. 773$(KALLSYMS): scripts ; 774 775# Generate some data for debugging strange kallsyms problems 776debug_kallsyms: .tmp_map$(last_kallsyms) 777 778.tmp_map%: .tmp_vmlinux% FORCE 779 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 780 781.tmp_map3: .tmp_map2 782 783.tmp_map2: .tmp_map1 784 785endif # ifdef CONFIG_KALLSYMS 786 787# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 788# relevant sections renamed as per the linker script. 789quiet_cmd_vmlinux-modpost = LD $@ 790 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 791 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 792 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^) 793define rule_vmlinux-modpost 794 : 795 +$(call cmd,vmlinux-modpost) 796 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 797 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 798endef 799 800# vmlinux image - including updated kernel symbols 801vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 802ifdef CONFIG_HEADERS_CHECK 803 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 804endif 805ifdef CONFIG_SAMPLES 806 $(Q)$(MAKE) $(build)=samples 807endif 808 $(call vmlinux-modpost) 809 $(call if_changed_rule,vmlinux__) 810 $(Q)rm -f .old_version 811 812# build vmlinux.o first to catch section mismatch errors early 813$(kallsyms.o): vmlinux.o 814vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE 815 $(call if_changed_rule,vmlinux-modpost) 816 817# The actual objects are generated when descending, 818# make sure no implicit rule kicks in 819$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 820 821# Handle descending into subdirectories listed in $(vmlinux-dirs) 822# Preset locale variables to speed up the build process. Limit locale 823# tweaks to this spot to avoid wrong language settings when running 824# make menuconfig etc. 825# Error messages still appears in the original language 826 827PHONY += $(vmlinux-dirs) 828$(vmlinux-dirs): prepare scripts 829 $(Q)$(MAKE) $(build)=$@ 830 831# Build the kernel release string 832# 833# The KERNELRELEASE value built here is stored in the file 834# include/config/kernel.release, and is used when executing several 835# make targets, such as "make install" or "make modules_install." 836# 837# The eventual kernel release string consists of the following fields, 838# shown in a hierarchical format to show how smaller parts are concatenated 839# to form the larger and final value, with values coming from places like 840# the Makefile, kernel config options, make command line options and/or 841# SCM tag information. 842# 843# $(KERNELVERSION) 844# $(VERSION) eg, 2 845# $(PATCHLEVEL) eg, 6 846# $(SUBLEVEL) eg, 18 847# $(EXTRAVERSION) eg, -rc6 848# $(localver-full) 849# $(localver) 850# localversion* (files without backups, containing '~') 851# $(CONFIG_LOCALVERSION) (from kernel config setting) 852# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 853# ./scripts/setlocalversion (SCM tag, if one exists) 854# $(LOCALVERSION) (from make command line if provided) 855# 856# Note how the final $(localver-auto) string is included *only* if the 857# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 858# moment, only git is supported but other SCMs can edit the script 859# scripts/setlocalversion and add the appropriate checks as needed. 860 861pattern = ".*/localversion[^~]*" 862string = $(shell cat /dev/null \ 863 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 864 865localver = $(subst $(space),, $(string) \ 866 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 867 868# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 869# and if the SCM is know a tag from the SCM is appended. 870# The appended tag is determined by the SCM used. 871# 872# Currently, only git is supported. 873# Other SCMs can edit scripts/setlocalversion and add the appropriate 874# checks as needed. 875ifdef CONFIG_LOCALVERSION_AUTO 876 _localver-auto = $(shell $(CONFIG_SHELL) \ 877 $(srctree)/scripts/setlocalversion $(srctree)) 878 localver-auto = $(LOCALVERSION)$(_localver-auto) 879endif 880 881localver-full = $(localver)$(localver-auto) 882 883# Store (new) KERNELRELASE string in include/config/kernel.release 884kernelrelease = $(KERNELVERSION)$(localver-full) 885include/config/kernel.release: include/config/auto.conf FORCE 886 $(Q)rm -f $@ 887 $(Q)echo $(kernelrelease) > $@ 888 889 890# Things we need to do before we recursively start building the kernel 891# or the modules are listed in "prepare". 892# A multi level approach is used. prepareN is processed before prepareN-1. 893# archprepare is used in arch Makefiles and when processed asm symlink, 894# version.h and scripts_basic is processed / created. 895 896# Listed in dependency order 897PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 898 899# prepare3 is used to check if we are building in a separate output directory, 900# and if so do: 901# 1) Check that make has not been executed in the kernel src $(srctree) 902# 2) Create the include2 directory, used for the second asm symlink 903prepare3: include/config/kernel.release 904ifneq ($(KBUILD_SRC),) 905 @echo ' Using $(srctree) as source for kernel' 906 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 907 echo " $(srctree) is not clean, please run 'make mrproper'";\ 908 echo " in the '$(srctree)' directory.";\ 909 /bin/false; \ 910 fi; 911 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 912 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm 913endif 914 915# prepare2 creates a makefile if using a separate output directory 916prepare2: prepare3 outputmakefile 917 918prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 919 include/asm include/config/auto.conf 920 $(cmd_crmodverdir) 921 922archprepare: prepare1 scripts_basic 923 924prepare0: archprepare FORCE 925 $(Q)$(MAKE) $(build)=. 926 $(Q)$(MAKE) $(build)=. missing-syscalls 927 928# All the preparing.. 929prepare: prepare0 930 931# Leave this as default for preprocessing vmlinux.lds.S, which is now 932# done in arch/$(ARCH)/kernel/Makefile 933 934export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 935 936# The asm symlink changes when $(ARCH) changes. 937# Detect this and ask user to run make mrproper 938 939include/asm: FORCE 940 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 941 if [ -L include/asm ]; then \ 942 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 943 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 944 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 945 exit 1; \ 946 fi; \ 947 else \ 948 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 949 if [ ! -d include ]; then \ 950 mkdir -p include; \ 951 fi; \ 952 ln -fsn asm-$(SRCARCH) $@; \ 953 fi 954 955# Generate some files 956# --------------------------------------------------------------------------- 957 958# KERNELRELEASE can change from a few different places, meaning version.h 959# needs to be updated, so this check is forced on all builds 960 961uts_len := 64 962define filechk_utsrelease.h 963 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 964 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 965 exit 1; \ 966 fi; \ 967 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 968endef 969 970define filechk_version.h 971 (echo \#define LINUX_VERSION_CODE $(shell \ 972 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 973 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 974endef 975 976include/linux/version.h: $(srctree)/Makefile FORCE 977 $(call filechk,version.h) 978 979include/linux/utsrelease.h: include/config/kernel.release FORCE 980 $(call filechk,utsrelease.h) 981 982# --------------------------------------------------------------------------- 983 984PHONY += depend dep 985depend dep: 986 @echo '*** Warning: make $@ is unnecessary now.' 987 988# --------------------------------------------------------------------------- 989# Kernel headers 990INSTALL_HDR_PATH=$(objtree)/usr 991export INSTALL_HDR_PATH 992 993HDRFILTER=generic i386 x86_64 994HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 995 996PHONY += headers_install_all 997headers_install_all: include/linux/version.h scripts_basic FORCE 998 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 999 $(Q)for arch in $(HDRARCHES); do \ 1000 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 1001 done 1002 1003PHONY += headers_install 1004headers_install: include/linux/version.h scripts_basic FORCE 1005 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1006 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ 1007 exit 1 ; fi 1008 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1009 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include 1010 1011PHONY += headers_check_all 1012headers_check_all: headers_install_all 1013 $(Q)for arch in $(HDRARCHES); do \ 1014 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ 1015 done 1016 1017PHONY += headers_check 1018headers_check: headers_install 1019 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 1020 1021# --------------------------------------------------------------------------- 1022# Modules 1023 1024ifdef CONFIG_MODULES 1025 1026# By default, build modules as well 1027 1028all: modules 1029 1030# Build modules 1031# 1032# A module can be listed more than once in obj-m resulting in 1033# duplicate lines in modules.order files. Those are removed 1034# using awk while concatenating to the final file. 1035 1036PHONY += modules 1037modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1038 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1039 @echo ' Building modules, stage 2.'; 1040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1041 1042 1043# Target to prepare building external modules 1044PHONY += modules_prepare 1045modules_prepare: prepare scripts 1046 1047# Target to install modules 1048PHONY += modules_install 1049modules_install: _modinst_ _modinst_post 1050 1051PHONY += _modinst_ 1052_modinst_: 1053 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1054 echo "Warning: you may need to install module-init-tools"; \ 1055 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1056 sleep 1; \ 1057 fi 1058 @rm -rf $(MODLIB)/kernel 1059 @rm -f $(MODLIB)/source 1060 @mkdir -p $(MODLIB)/kernel 1061 @ln -s $(srctree) $(MODLIB)/source 1062 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1063 rm -f $(MODLIB)/build ; \ 1064 ln -s $(objtree) $(MODLIB)/build ; \ 1065 fi 1066 @cp -f $(objtree)/modules.order $(MODLIB)/ 1067 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1068 1069# This depmod is only for convenience to give the initial 1070# boot a modules.dep even before / is mounted read-write. However the 1071# boot script depmod is the master version. 1072PHONY += _modinst_post 1073_modinst_post: _modinst_ 1074 $(call cmd,depmod) 1075 1076else # CONFIG_MODULES 1077 1078# Modules not configured 1079# --------------------------------------------------------------------------- 1080 1081modules modules_install: FORCE 1082 @echo 1083 @echo "The present kernel configuration has modules disabled." 1084 @echo "Type 'make config' and enable loadable module support." 1085 @echo "Then build a kernel with module support enabled." 1086 @echo 1087 @exit 1 1088 1089endif # CONFIG_MODULES 1090 1091### 1092# Cleaning is done on three levels. 1093# make clean Delete most generated files 1094# Leave enough to build external modules 1095# make mrproper Delete the current configuration, and all generated files 1096# make distclean Remove editor backup files, patch leftover files and the like 1097 1098# Directories & files removed with 'make clean' 1099CLEAN_DIRS += $(MODVERDIR) 1100CLEAN_FILES += vmlinux System.map \ 1101 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1102 1103# Directories & files removed with 'make mrproper' 1104MRPROPER_DIRS += include/config include2 usr/include 1105MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1106 include/linux/autoconf.h include/linux/version.h \ 1107 include/linux/utsrelease.h \ 1108 Module.symvers tags TAGS cscope* 1109 1110# clean - Delete most, but leave enough to build external modules 1111# 1112clean: rm-dirs := $(CLEAN_DIRS) 1113clean: rm-files := $(CLEAN_FILES) 1114clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1115 1116PHONY += $(clean-dirs) clean archclean 1117$(clean-dirs): 1118 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1119 1120clean: archclean $(clean-dirs) 1121 $(call cmd,rmdirs) 1122 $(call cmd,rmfiles) 1123 @find . $(RCS_FIND_IGNORE) \ 1124 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1125 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1126 -o -name '*.symtypes' -o -name 'modules.order' \) \ 1127 -type f -print | xargs rm -f 1128 1129# mrproper - Delete all generated files, including .config 1130# 1131mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1132mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1133mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1134 1135PHONY += $(mrproper-dirs) mrproper archmrproper 1136$(mrproper-dirs): 1137 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1138 1139mrproper: clean archmrproper $(mrproper-dirs) 1140 $(call cmd,rmdirs) 1141 $(call cmd,rmfiles) 1142 1143# distclean 1144# 1145PHONY += distclean 1146 1147distclean: mrproper 1148 @find $(srctree) $(RCS_FIND_IGNORE) \ 1149 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1150 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1151 -o -name '.*.rej' -o -size 0 \ 1152 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1153 -type f -print | xargs rm -f 1154 1155 1156# Packaging of the kernel to various formats 1157# --------------------------------------------------------------------------- 1158# rpm target kept for backward compatibility 1159package-dir := $(srctree)/scripts/package 1160 1161%pkg: include/config/kernel.release FORCE 1162 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1163rpm: include/config/kernel.release FORCE 1164 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1165 1166 1167# Brief documentation of the typical targets used 1168# --------------------------------------------------------------------------- 1169 1170boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1171boards := $(notdir $(boards)) 1172 1173help: 1174 @echo 'Cleaning targets:' 1175 @echo ' clean - Remove most generated files but keep the config and' 1176 @echo ' enough build support to build external modules' 1177 @echo ' mrproper - Remove all generated files + config + various backup files' 1178 @echo ' distclean - mrproper + remove editor backup and patch files' 1179 @echo '' 1180 @echo 'Configuration targets:' 1181 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1182 @echo '' 1183 @echo 'Other generic targets:' 1184 @echo ' all - Build all targets marked with [*]' 1185 @echo '* vmlinux - Build the bare kernel' 1186 @echo '* modules - Build all modules' 1187 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1188 @echo ' dir/ - Build all files in dir and below' 1189 @echo ' dir/file.[ois] - Build specified target only' 1190 @echo ' dir/file.ko - Build module including final link' 1191 @echo ' prepare - Set up for building external modules' 1192 @echo ' tags/TAGS - Generate tags file for editors' 1193 @echo ' cscope - Generate cscope index' 1194 @echo ' kernelrelease - Output the release version string' 1195 @echo ' kernelversion - Output the version stored in Makefile' 1196 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1197 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1198 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1199 fi 1200 @echo '' 1201 @echo 'Static analysers' 1202 @echo ' checkstack - Generate a list of stack hogs' 1203 @echo ' namespacecheck - Name space analysis on compiled kernel' 1204 @echo ' versioncheck - Sanity check on version.h usage' 1205 @echo ' includecheck - Check for duplicate included header files' 1206 @echo ' export_report - List the usages of all exported symbols' 1207 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1208 echo ' headers_check - Sanity check on exported headers'; \ 1209 fi 1210 @echo '' 1211 @echo 'Kernel packaging:' 1212 @$(MAKE) $(build)=$(package-dir) help 1213 @echo '' 1214 @echo 'Documentation targets:' 1215 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1216 @echo '' 1217 @echo 'Architecture specific targets ($(ARCH)):' 1218 @$(if $(archhelp),$(archhelp),\ 1219 echo ' No architecture specific help defined for $(ARCH)') 1220 @echo '' 1221 @$(if $(boards), \ 1222 $(foreach b, $(boards), \ 1223 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1224 echo '') 1225 1226 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1227 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1228 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1229 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1230 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1231 @echo '' 1232 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1233 @echo 'For further info see the ./README file' 1234 1235 1236# Documentation targets 1237# --------------------------------------------------------------------------- 1238%docs: scripts_basic FORCE 1239 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1240 1241else # KBUILD_EXTMOD 1242 1243### 1244# External module support. 1245# When building external modules the kernel used as basis is considered 1246# read-only, and no consistency checks are made and the make 1247# system is not used on the basis kernel. If updates are required 1248# in the basis kernel ordinary make commands (without M=...) must 1249# be used. 1250# 1251# The following are the only valid targets when building external 1252# modules. 1253# make M=dir clean Delete all automatically generated files 1254# make M=dir modules Make all modules in specified dir 1255# make M=dir Same as 'make M=dir modules' 1256# make M=dir modules_install 1257# Install the modules built in the module directory 1258# Assumes install directory is already created 1259 1260# We are always building modules 1261KBUILD_MODULES := 1 1262PHONY += crmodverdir 1263crmodverdir: 1264 $(cmd_crmodverdir) 1265 1266PHONY += $(objtree)/Module.symvers 1267$(objtree)/Module.symvers: 1268 @test -e $(objtree)/Module.symvers || ( \ 1269 echo; \ 1270 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1271 echo " is missing; modules will have no dependencies and modversions."; \ 1272 echo ) 1273 1274module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1275PHONY += $(module-dirs) modules 1276$(module-dirs): crmodverdir $(objtree)/Module.symvers 1277 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1278 1279modules: $(module-dirs) 1280 @echo ' Building modules, stage 2.'; 1281 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1282 1283PHONY += modules_install 1284modules_install: _emodinst_ _emodinst_post 1285 1286install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1287PHONY += _emodinst_ 1288_emodinst_: 1289 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1290 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1291 1292PHONY += _emodinst_post 1293_emodinst_post: _emodinst_ 1294 $(call cmd,depmod) 1295 1296clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1297 1298PHONY += $(clean-dirs) clean 1299$(clean-dirs): 1300 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1301 1302clean: rm-dirs := $(MODVERDIR) 1303clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1304clean: $(clean-dirs) 1305 $(call cmd,rmdirs) 1306 $(call cmd,rmfiles) 1307 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1308 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1309 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1310 -type f -print | xargs rm -f 1311 1312help: 1313 @echo ' Building external modules.' 1314 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1315 @echo '' 1316 @echo ' modules - default target, build the module(s)' 1317 @echo ' modules_install - install the module' 1318 @echo ' clean - remove generated files in module directory only' 1319 @echo '' 1320 1321# Dummies... 1322PHONY += prepare scripts 1323prepare: ; 1324scripts: ; 1325endif # KBUILD_EXTMOD 1326 1327# Generate tags for editors 1328# --------------------------------------------------------------------------- 1329 1330#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1331#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1332#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1333 1334ifeq ($(src),$(obj)) 1335__srctree = 1336else 1337__srctree = $(srctree)/ 1338endif 1339 1340ifeq ($(ALLSOURCE_ARCHS),) 1341ifeq ($(ARCH),um) 1342ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1343else 1344ALLINCLUDE_ARCHS := $(SRCARCH) 1345endif 1346else 1347#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1348ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1349endif 1350 1351ALLSOURCE_ARCHS := $(SRCARCH) 1352 1353define find-sources 1354 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1355 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1356 -name $1 -print; \ 1357 done ; \ 1358 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1359 -name $1 -print; \ 1360 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1361 \( -name config -o -name 'asm-*' \) -prune \ 1362 -o -name $1 -print; \ 1363 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1364 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1365 -name $1 -print; \ 1366 done ; \ 1367 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1368 -name $1 -print; \ 1369 find $(__srctree) $(RCS_FIND_IGNORE) \ 1370 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1371 -name $1 -print; \ 1372 ) 1373endef 1374 1375define all-sources 1376 $(call find-sources,'*.[chS]') 1377endef 1378define all-kconfigs 1379 $(call find-sources,'Kconfig*') 1380endef 1381define all-defconfigs 1382 $(call find-sources,'defconfig') 1383endef 1384 1385define xtags 1386 if $1 --version 2>&1 | grep -iq exuberant; then \ 1387 $(all-sources) | xargs $1 -a \ 1388 -I __initdata,__exitdata,__acquires,__releases \ 1389 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1390 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1391 --extra=+f --c-kinds=+px \ 1392 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1393 $(all-kconfigs) | xargs $1 -a \ 1394 --langdef=kconfig \ 1395 --language-force=kconfig \ 1396 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ 1397 $(all-defconfigs) | xargs -r $1 -a \ 1398 --langdef=dotconfig \ 1399 --language-force=dotconfig \ 1400 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1401 elif $1 --version 2>&1 | grep -iq emacs; then \ 1402 $(all-sources) | xargs $1 -a; \ 1403 $(all-kconfigs) | xargs $1 -a \ 1404 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1405 $(all-defconfigs) | xargs -r $1 -a \ 1406 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1407 else \ 1408 $(all-sources) | xargs $1 -a; \ 1409 fi 1410endef 1411 1412quiet_cmd_cscope-file = FILELST cscope.files 1413 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1414 1415quiet_cmd_cscope = MAKE cscope.out 1416 cmd_cscope = cscope -b 1417 1418cscope: FORCE 1419 $(call cmd,cscope-file) 1420 $(call cmd,cscope) 1421 1422quiet_cmd_TAGS = MAKE $@ 1423define cmd_TAGS 1424 rm -f $@; \ 1425 $(call xtags,etags) 1426endef 1427 1428TAGS: FORCE 1429 $(call cmd,TAGS) 1430 1431quiet_cmd_tags = MAKE $@ 1432define cmd_tags 1433 rm -f $@; \ 1434 $(call xtags,ctags) 1435endef 1436 1437tags: FORCE 1438 $(call cmd,tags) 1439 1440 1441# Scripts to check various things for consistency 1442# --------------------------------------------------------------------------- 1443 1444includecheck: 1445 find * $(RCS_FIND_IGNORE) \ 1446 -name '*.[hcS]' -type f -print | sort \ 1447 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1448 1449versioncheck: 1450 find * $(RCS_FIND_IGNORE) \ 1451 -name '*.[hcS]' -type f -print | sort \ 1452 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1453 1454namespacecheck: 1455 $(PERL) $(srctree)/scripts/namespace.pl 1456 1457export_report: 1458 $(PERL) $(srctree)/scripts/export_report.pl 1459 1460endif #ifeq ($(config-targets),1) 1461endif #ifeq ($(mixed-targets),1) 1462 1463PHONY += checkstack kernelrelease kernelversion 1464 1465# UML needs a little special treatment here. It wants to use the host 1466# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1467# else wants $(ARCH), including people doing cross-builds, which means 1468# that $(SUBARCH) doesn't work here. 1469ifeq ($(ARCH), um) 1470CHECKSTACK_ARCH := $(SUBARCH) 1471else 1472CHECKSTACK_ARCH := $(ARCH) 1473endif 1474checkstack: 1475 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1476 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1477 1478kernelrelease: 1479 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1480 $(error kernelrelease not valid - run 'make prepare' to update it)) 1481kernelversion: 1482 @echo $(KERNELVERSION) 1483 1484# Single targets 1485# --------------------------------------------------------------------------- 1486# Single targets are compatible with: 1487# - build with mixed source and output 1488# - build with separate output dir 'make O=...' 1489# - external modules 1490# 1491# target-dir => where to store outputfile 1492# build-dir => directory in kernel source tree to use 1493 1494ifeq ($(KBUILD_EXTMOD),) 1495 build-dir = $(patsubst %/,%,$(dir $@)) 1496 target-dir = $(dir $@) 1497else 1498 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1499 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1500 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1501endif 1502 1503%.s: %.c prepare scripts FORCE 1504 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1505%.i: %.c prepare scripts FORCE 1506 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1507%.o: %.c prepare scripts FORCE 1508 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1509%.lst: %.c prepare scripts FORCE 1510 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1511%.s: %.S prepare scripts FORCE 1512 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1513%.o: %.S prepare scripts FORCE 1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1515%.symtypes: %.c prepare scripts FORCE 1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1517 1518# Modules 1519/ %/: prepare scripts FORCE 1520 $(cmd_crmodverdir) 1521 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1522 $(build)=$(build-dir) 1523%.ko: prepare scripts FORCE 1524 $(cmd_crmodverdir) 1525 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1526 $(build)=$(build-dir) $(@:.ko=.o) 1527 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1528 1529# FIXME Should go into a make.lib or something 1530# =========================================================================== 1531 1532quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1533 cmd_rmdirs = rm -rf $(rm-dirs) 1534 1535quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1536 cmd_rmfiles = rm -f $(rm-files) 1537 1538# Run depmod only is we have System.map and depmod is executable 1539# and we build for the host arch 1540quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1541 cmd_depmod = \ 1542 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1543 $(DEPMOD) -ae -F System.map \ 1544 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1545 $(KERNELRELEASE); \ 1546 fi 1547 1548# Create temporary dir for module support files 1549# clean it up only when building all modules 1550cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1551 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1552 1553a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1554 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1555 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1556 1557quiet_cmd_as_o_S = AS $@ 1558cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1559 1560# read all saved command lines 1561 1562targets := $(wildcard $(sort $(targets))) 1563cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1564 1565ifneq ($(cmd_files),) 1566 $(cmd_files): ; # Do not try to update included dependency files 1567 include $(cmd_files) 1568endif 1569 1570# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1571# Usage: 1572# $(Q)$(MAKE) $(clean)=dir 1573clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1574 1575endif # skip-makefile 1576 1577PHONY += FORCE 1578FORCE: 1579 1580# Declare the contents of the .PHONY variable as phony. We keep that 1581# information in a variable se we can use it in if_changed and friends. 1582.PHONY: $(PHONY) 1583