1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 28 4EXTRAVERSION = 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 ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208# Additional ARCH settings for sparc 209ifeq ($(ARCH),sparc64) 210 SRCARCH := sparc 211endif 212 213# Where to locate arch specific headers 214hdr-arch := $(SRCARCH) 215 216KCONFIG_CONFIG ?= .config 217 218# SHELL used by kbuild 219CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 220 else if [ -x /bin/bash ]; then echo /bin/bash; \ 221 else echo sh; fi ; fi) 222 223HOSTCC = gcc 224HOSTCXX = g++ 225HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 226HOSTCXXFLAGS = -O2 227 228# Decide whether to build built-in, modular, or both. 229# Normally, just do built-in. 230 231KBUILD_MODULES := 232KBUILD_BUILTIN := 1 233 234# If we have only "make modules", don't compile built-in objects. 235# When we're building modules with modversions, we need to consider 236# the built-in objects during the descend as well, in order to 237# make sure the checksums are up to date before we record them. 238 239ifeq ($(MAKECMDGOALS),modules) 240 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 241endif 242 243# If we have "make <whatever> modules", compile modules 244# in addition to whatever we do anyway. 245# Just "make" or "make all" shall build modules as well 246 247ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 248 KBUILD_MODULES := 1 249endif 250 251ifeq ($(MAKECMDGOALS),) 252 KBUILD_MODULES := 1 253endif 254 255export KBUILD_MODULES KBUILD_BUILTIN 256export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 257 258# Beautify output 259# --------------------------------------------------------------------------- 260# 261# Normally, we echo the whole command before executing it. By making 262# that echo $($(quiet)$(cmd)), we now have the possibility to set 263# $(quiet) to choose other forms of output instead, e.g. 264# 265# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 266# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 267# 268# If $(quiet) is empty, the whole command will be printed. 269# If it is set to "quiet_", only the short version will be printed. 270# If it is set to "silent_", nothing will be printed at all, since 271# the variable $(silent_cmd_cc_o_c) doesn't exist. 272# 273# A simple variant is to prefix commands with $(Q) - that's useful 274# for commands that shall be hidden in non-verbose mode. 275# 276# $(Q)ln $@ :< 277# 278# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 279# If KBUILD_VERBOSE equals 1 then the above command is displayed. 280 281ifeq ($(KBUILD_VERBOSE),1) 282 quiet = 283 Q = 284else 285 quiet=quiet_ 286 Q = @ 287endif 288 289# If the user is running make -s (silent mode), suppress echoing of 290# commands 291 292ifneq ($(findstring s,$(MAKEFLAGS)),) 293 quiet=silent_ 294endif 295 296export quiet Q KBUILD_VERBOSE 297 298 299# Look for make include files relative to root of kernel src 300MAKEFLAGS += --include-dir=$(srctree) 301 302# We need some generic definitions (do not try to remake the file). 303$(srctree)/scripts/Kbuild.include: ; 304include $(srctree)/scripts/Kbuild.include 305 306# Make variables (CC, etc...) 307 308AS = $(CROSS_COMPILE)as 309LD = $(CROSS_COMPILE)ld 310CC = $(CROSS_COMPILE)gcc 311CPP = $(CC) -E 312AR = $(CROSS_COMPILE)ar 313NM = $(CROSS_COMPILE)nm 314STRIP = $(CROSS_COMPILE)strip 315OBJCOPY = $(CROSS_COMPILE)objcopy 316OBJDUMP = $(CROSS_COMPILE)objdump 317AWK = awk 318GENKSYMS = scripts/genksyms/genksyms 319DEPMOD = /sbin/depmod 320KALLSYMS = scripts/kallsyms 321PERL = perl 322CHECK = sparse 323 324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 325 -Wbitwise -Wno-return-void $(CF) 326MODFLAGS = -DMODULE 327CFLAGS_MODULE = $(MODFLAGS) 328AFLAGS_MODULE = $(MODFLAGS) 329LDFLAGS_MODULE = 330CFLAGS_KERNEL = 331AFLAGS_KERNEL = 332 333 334# Use LINUXINCLUDE when you must reference the include/ directory. 335# Needed to be compatible with the O= option 336LINUXINCLUDE := -Iinclude \ 337 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 338 -I$(srctree)/arch/$(hdr-arch)/include \ 339 -include include/linux/autoconf.h 340 341KBUILD_CPPFLAGS := -D__KERNEL__ 342 343KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 344 -fno-strict-aliasing -fno-common \ 345 -Werror-implicit-function-declaration 346KBUILD_AFLAGS := -D__ASSEMBLY__ 347 348# Read KERNELRELEASE from include/config/kernel.release (if it exists) 349KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 350KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 351 352export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 353export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 354export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 355export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 356 357export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 358export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 359export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 360 361# When compiling out-of-tree modules, put MODVERDIR in the module 362# tree rather than in the kernel tree. The kernel tree might 363# even be read-only. 364export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 365 366# Files to ignore in find ... statements 367 368RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 369export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 370 371# =========================================================================== 372# Rules shared between *config targets and build targets 373 374# Basic helpers built in scripts/ 375PHONY += scripts_basic 376scripts_basic: 377 $(Q)$(MAKE) $(build)=scripts/basic 378 379# To avoid any implicit rule to kick in, define an empty command. 380scripts/basic/%: scripts_basic ; 381 382PHONY += outputmakefile 383# outputmakefile generates a Makefile in the output directory, if using a 384# separate output directory. This allows convenient use of make in the 385# output directory. 386outputmakefile: 387ifneq ($(KBUILD_SRC),) 388 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 389 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 390endif 391 392# To make sure we do not include .config for any of the *config targets 393# catch them early, and hand them over to scripts/kconfig/Makefile 394# It is allowed to specify more targets when calling make, including 395# mixing *config targets and build targets. 396# For example 'make oldconfig all'. 397# Detect when mixed targets is specified, and make a second invocation 398# of make so .config is not included in this case either (for *config). 399 400no-dot-config-targets := clean mrproper distclean \ 401 cscope TAGS tags help %docs check% \ 402 include/linux/version.h headers_% \ 403 kernelrelease kernelversion 404 405config-targets := 0 406mixed-targets := 0 407dot-config := 1 408 409ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 410 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 411 dot-config := 0 412 endif 413endif 414 415ifeq ($(KBUILD_EXTMOD),) 416 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 417 config-targets := 1 418 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 419 mixed-targets := 1 420 endif 421 endif 422endif 423 424ifeq ($(mixed-targets),1) 425# =========================================================================== 426# We're called with mixed targets (*config and build targets). 427# Handle them one by one. 428 429%:: FORCE 430 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 431 432else 433ifeq ($(config-targets),1) 434# =========================================================================== 435# *config targets only - make sure prerequisites are updated, and descend 436# in scripts/kconfig to make the *config target 437 438# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 439# KBUILD_DEFCONFIG may point out an alternative default configuration 440# used for 'make defconfig' 441include $(srctree)/arch/$(SRCARCH)/Makefile 442export KBUILD_DEFCONFIG KBUILD_KCONFIG 443 444config: scripts_basic outputmakefile FORCE 445 $(Q)mkdir -p include/linux include/config 446 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 447 448%config: scripts_basic outputmakefile FORCE 449 $(Q)mkdir -p include/linux include/config 450 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 451 452else 453# =========================================================================== 454# Build targets only - this includes vmlinux, arch specific targets, clean 455# targets and others. In general all targets except *config targets. 456 457ifeq ($(KBUILD_EXTMOD),) 458# Additional helpers built in scripts/ 459# Carefully list dependencies so we do not try to build scripts twice 460# in parallel 461PHONY += scripts 462scripts: scripts_basic include/config/auto.conf 463 $(Q)$(MAKE) $(build)=$(@) 464 465# Objects we will link into vmlinux / subdirs we need to visit 466init-y := init/ 467drivers-y := drivers/ sound/ firmware/ 468net-y := net/ 469libs-y := lib/ 470core-y := usr/ 471endif # KBUILD_EXTMOD 472 473ifeq ($(dot-config),1) 474# Read in config 475-include include/config/auto.conf 476 477ifeq ($(KBUILD_EXTMOD),) 478# Read in dependencies to all Kconfig* files, make sure to run 479# oldconfig if changes are detected. 480-include include/config/auto.conf.cmd 481 482# To avoid any implicit rule to kick in, define an empty command 483$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 484 485# If .config is newer than include/config/auto.conf, someone tinkered 486# with it and forgot to run make oldconfig. 487# if auto.conf.cmd is missing then we are probably in a cleaned tree so 488# we execute the config step to be sure to catch updated Kconfig files 489include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 490 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 491else 492# external modules needs include/linux/autoconf.h and include/config/auto.conf 493# but do not care if they are up-to-date. Use auto.conf to trigger the test 494PHONY += include/config/auto.conf 495 496include/config/auto.conf: 497 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 498 echo; \ 499 echo " ERROR: Kernel configuration is invalid."; \ 500 echo " include/linux/autoconf.h or $@ are missing."; \ 501 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 502 echo; \ 503 /bin/false) 504 505endif # KBUILD_EXTMOD 506 507else 508# Dummy target needed, because used as prerequisite 509include/config/auto.conf: ; 510endif # $(dot-config) 511 512# The all: target is the default when no target is given on the 513# command line. 514# This allow a user to issue only 'make' to build a kernel including modules 515# Defaults vmlinux but it is usually overridden in the arch makefile 516all: vmlinux 517 518ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 519KBUILD_CFLAGS += -Os 520else 521KBUILD_CFLAGS += -O2 522endif 523 524include $(srctree)/arch/$(SRCARCH)/Makefile 525 526ifneq (CONFIG_FRAME_WARN,0) 527KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 528endif 529 530# Force gcc to behave correct even for buggy distributions 531# Arch Makefiles may override this setting 532KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 533 534ifdef CONFIG_FRAME_POINTER 535KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 536else 537KBUILD_CFLAGS += -fomit-frame-pointer 538endif 539 540ifdef CONFIG_DEBUG_INFO 541KBUILD_CFLAGS += -g 542KBUILD_AFLAGS += -gdwarf-2 543endif 544 545ifdef CONFIG_FUNCTION_TRACER 546KBUILD_CFLAGS += -pg 547endif 548 549# We trigger additional mismatches with less inlining 550ifdef CONFIG_DEBUG_SECTION_MISMATCH 551KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 552endif 553 554# arch Makefile may override CC so keep this after arch Makefile is included 555NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 556CHECKFLAGS += $(NOSTDINC_FLAGS) 557 558# warn about C99 declaration after statement 559KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 560 561# disable pointer signed / unsigned warnings in gcc 4.0 562KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 563 564# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 565# But warn user when we do so 566warn-assign = \ 567$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 568 569ifneq ($(KCPPFLAGS),) 570 $(call warn-assign,CPPFLAGS) 571 KBUILD_CPPFLAGS += $(KCPPFLAGS) 572endif 573ifneq ($(KAFLAGS),) 574 $(call warn-assign,AFLAGS) 575 KBUILD_AFLAGS += $(KAFLAGS) 576endif 577ifneq ($(KCFLAGS),) 578 $(call warn-assign,CFLAGS) 579 KBUILD_CFLAGS += $(KCFLAGS) 580endif 581 582# Use --build-id when available. 583LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 584 $(call ld-option, -Wl$(comma)--build-id,)) 585LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 586LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 587 588# Default kernel image to build when no specific target is given. 589# KBUILD_IMAGE may be overruled on the command line or 590# set in the environment 591# Also any assignments in arch/$(ARCH)/Makefile take precedence over 592# this default value 593export KBUILD_IMAGE ?= vmlinux 594 595# 596# INSTALL_PATH specifies where to place the updated kernel and system map 597# images. Default is /boot, but you can set it to other values 598export INSTALL_PATH ?= /boot 599 600# 601# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 602# relocations required by build roots. This is not defined in the 603# makefile but the argument can be passed to make if needed. 604# 605 606MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 607export MODLIB 608 609strip-symbols := $(srctree)/scripts/strip-symbols \ 610 $(wildcard $(srctree)/arch/$(ARCH)/scripts/strip-symbols) 611 612# 613# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped while 614# they get installed. If INSTALL_MOD_STRIP is '1', then the default 615# options (see below) will be used. Otherwise, INSTALL_MOD_STRIP will 616# be used as the option(s) to the objcopy command. 617ifdef INSTALL_MOD_STRIP 618ifeq ($(INSTALL_MOD_STRIP),1) 619mod_strip_cmd = $(OBJCOPY) --strip-debug 620ifeq ($(CONFIG_KALLSYMS_ALL),$(CONFIG_KALLSYMS_STRIP_GENERATED)) 621mod_strip_cmd += --wildcard $(addprefix --strip-symbols ,$(strip-symbols)) 622endif 623else 624mod_strip_cmd = $(OBJCOPY) $(INSTALL_MOD_STRIP) 625endif # INSTALL_MOD_STRIP=1 626else 627mod_strip_cmd = false 628endif # INSTALL_MOD_STRIP 629export mod_strip_cmd 630 631 632ifeq ($(KBUILD_EXTMOD),) 633core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 634 635vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 636 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 637 $(net-y) $(net-m) $(libs-y) $(libs-m))) 638 639vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 640 $(init-n) $(init-) \ 641 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 642 $(net-n) $(net-) $(libs-n) $(libs-)))) 643 644init-y := $(patsubst %/, %/built-in.o, $(init-y)) 645core-y := $(patsubst %/, %/built-in.o, $(core-y)) 646drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 647net-y := $(patsubst %/, %/built-in.o, $(net-y)) 648libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 649libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 650libs-y := $(libs-y1) $(libs-y2) 651 652# Build vmlinux 653# --------------------------------------------------------------------------- 654# vmlinux is built from the objects selected by $(vmlinux-init) and 655# $(vmlinux-main). Most are built-in.o files from top-level directories 656# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 657# Ordering when linking is important, and $(vmlinux-init) must be first. 658# 659# vmlinux 660# ^ 661# | 662# +-< $(vmlinux-init) 663# | +--< init/version.o + more 664# | 665# +--< $(vmlinux-main) 666# | +--< driver/built-in.o mm/built-in.o + more 667# | 668# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 669# 670# vmlinux version (uname -v) cannot be updated during normal 671# descending-into-subdirs phase since we do not yet know if we need to 672# update vmlinux. 673# Therefore this step is delayed until just before final link of vmlinux - 674# except in the kallsyms case where it is done just before adding the 675# symbols to the kernel. 676# 677# System.map is generated to document addresses of all kernel symbols 678 679vmlinux-init := $(head-y) $(init-y) 680vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 681vmlinux-all := $(vmlinux-init) $(vmlinux-main) 682vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 683export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 684 685# Rule to link vmlinux - also used during CONFIG_KALLSYMS 686# May be overridden by arch/$(ARCH)/Makefile 687quiet_cmd_vmlinux__ ?= LD $@ 688 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 689 -T $(vmlinux-lds) $(vmlinux-init) \ 690 --start-group $(vmlinux-main) --end-group \ 691 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 692 693# Generate new vmlinux version 694quiet_cmd_vmlinux_version = GEN .version 695 cmd_vmlinux_version = set -e; \ 696 if [ ! -r .version ]; then \ 697 rm -f .version; \ 698 echo 1 >.version; \ 699 else \ 700 mv .version .old_version; \ 701 expr 0$$(cat .old_version) + 1 >.version; \ 702 fi; \ 703 $(MAKE) $(build)=init 704 705# Generate System.map 706quiet_cmd_sysmap = SYSMAP 707 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 708 709# Link of vmlinux 710# If CONFIG_KALLSYMS is set .version is already updated 711# Generate System.map and verify that the content is consistent 712# Use + in front of the vmlinux_version rule to silent warning with make -j2 713# First command is ':' to allow us to use + in front of the rule 714define rule_vmlinux__ 715 : 716 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 717 718 $(call cmd,vmlinux__) 719 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 720 721 $(Q)$(if $($(quiet)cmd_sysmap), \ 722 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 723 $(cmd_sysmap) $@ System.map; \ 724 if [ $$? -ne 0 ]; then \ 725 rm -f $@; \ 726 /bin/false; \ 727 fi; 728 $(verify_kallsyms) 729endef 730 731 732ifdef CONFIG_KALLSYMS 733# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 734# It's a three stage process: 735# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 736# empty 737# Running kallsyms on that gives us .tmp_kallsyms1.o with 738# the right size - vmlinux version (uname -v) is updated during this step 739# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 740# but due to the added section, some addresses have shifted. 741# From here, we generate a correct .tmp_kallsyms2.o 742# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 743# o Verify that the System.map from vmlinux matches the map from 744# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 745# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 746# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 747# temporary bypass to allow the kernel to be built while the 748# maintainers work out what went wrong with kallsyms. 749 750ifdef CONFIG_KALLSYMS_EXTRA_PASS 751last_kallsyms := 3 752else 753last_kallsyms := 2 754endif 755 756kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 757kallsyms.h := $(wildcard include/config/kallsyms/*.h) $(wildcard include/config/kallsyms/*/*.h) 758 759define verify_kallsyms 760 $(Q)$(if $($(quiet)cmd_sysmap), \ 761 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 762 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 763 $(Q)cmp -s System.map .tmp_System.map || \ 764 (echo Inconsistent kallsyms data; \ 765 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 766 rm .tmp_kallsyms* ; /bin/false ) 767endef 768 769# Update vmlinux version before link 770# Use + in front of this rule to silent warning about make -j1 771# First command is ':' to allow us to use + in front of this rule 772cmd_ksym_ld = $(cmd_vmlinux__) 773define rule_ksym_ld 774 : 775 +$(call cmd,vmlinux_version) 776 $(call cmd,vmlinux__) 777 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 778endef 779 780# Generate .S file with all kernel symbols 781quiet_cmd_kallsyms = KSYM $@ 782 cmd_kallsyms = { test $* -eq 0 || $(NM) -n $<; } \ 783 | $(KALLSYMS) $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) >$@ 784 785quiet_cmd_kstrip = STRIP $@ 786 cmd_kstrip = $(OBJCOPY) --wildcard $(addprefix --strip$(if $(CONFIG_RELOCATABLE),-unneeded)-symbols ,$(filter %/scripts/strip-symbols,$^)) $< $@ 787 788$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): KBUILD_AFLAGS += -Wa,--strip-local-absolute 789$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): %.o: %.S scripts FORCE 790 $(call if_changed_dep,as_o_S) 791 792ifeq ($(CONFIG_KALLSYMS_STRIP_GENERATED),y) 793strip-ext := .stripped 794endif 795 796.tmp_kallsyms%.S: .tmp_vmlinux%$(strip-ext) $(KALLSYMS) $(kallsyms.h) 797 $(call cmd,kallsyms) 798 799# make -jN seems to have problems with intermediate files, see bug #3330. 800.SECONDARY: $(foreach n,1 2 3,.tmp_vmlinux$(n).stripped) 801.tmp_vmlinux%.stripped: .tmp_vmlinux% $(strip-symbols) $(kallsyms.h) 802 $(call cmd,kstrip) 803 804ifneq ($(CONFIG_DEBUG_INFO),y) 805.tmp_vmlinux%: LDFLAGS_vmlinux += -S 806endif 807# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 808.tmp_vmlinux%: $(vmlinux-lds) $(vmlinux-all) FORCE 809 $(if $(filter 1,$*),$(call if_changed_rule,ksym_ld),$(call if_changed,vmlinux__)) 810 811.tmp_vmlinux0$(strip-ext): 812 $(Q)echo "placeholder" >$@ 813 814.tmp_vmlinux1: .tmp_kallsyms0.o 815.tmp_vmlinux2: .tmp_kallsyms1.o 816.tmp_vmlinux3: .tmp_kallsyms2.o 817 818# Needs to visit scripts/ before $(KALLSYMS) can be used. 819$(KALLSYMS): scripts ; 820 821# Generate some data for debugging strange kallsyms problems 822debug_kallsyms: .tmp_map$(last_kallsyms) 823 824.tmp_map%: .tmp_vmlinux% FORCE 825 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 826 827.tmp_map3: .tmp_map2 828 829.tmp_map2: .tmp_map1 830 831endif # ifdef CONFIG_KALLSYMS 832 833# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 834# relevant sections renamed as per the linker script. 835quiet_cmd_vmlinux-modpost = LD $@ 836 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 837 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 838 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 839define rule_vmlinux-modpost 840 : 841 +$(call cmd,vmlinux-modpost) 842 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 843 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 844endef 845 846# vmlinux image - including updated kernel symbols 847vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 848ifdef CONFIG_HEADERS_CHECK 849 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 850endif 851ifdef CONFIG_SAMPLES 852 $(Q)$(MAKE) $(build)=samples 853endif 854ifdef CONFIG_BUILD_DOCSRC 855 $(Q)$(MAKE) $(build)=Documentation 856endif 857 $(call vmlinux-modpost) 858 $(call if_changed_rule,vmlinux__) 859 $(Q)rm -f .old_version 860 861# build vmlinux.o first to catch section mismatch errors early 862ifdef CONFIG_KALLSYMS 863.tmp_vmlinux1: vmlinux.o 864endif 865 866modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 867vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 868 $(call if_changed_rule,vmlinux-modpost) 869 870# The actual objects are generated when descending, 871# make sure no implicit rule kicks in 872$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 873 874# Handle descending into subdirectories listed in $(vmlinux-dirs) 875# Preset locale variables to speed up the build process. Limit locale 876# tweaks to this spot to avoid wrong language settings when running 877# make menuconfig etc. 878# Error messages still appears in the original language 879 880PHONY += $(vmlinux-dirs) 881$(vmlinux-dirs): prepare scripts 882 $(Q)$(MAKE) $(build)=$@ 883 884# Build the kernel release string 885# 886# The KERNELRELEASE value built here is stored in the file 887# include/config/kernel.release, and is used when executing several 888# make targets, such as "make install" or "make modules_install." 889# 890# The eventual kernel release string consists of the following fields, 891# shown in a hierarchical format to show how smaller parts are concatenated 892# to form the larger and final value, with values coming from places like 893# the Makefile, kernel config options, make command line options and/or 894# SCM tag information. 895# 896# $(KERNELVERSION) 897# $(VERSION) eg, 2 898# $(PATCHLEVEL) eg, 6 899# $(SUBLEVEL) eg, 18 900# $(EXTRAVERSION) eg, -rc6 901# $(localver-full) 902# $(localver) 903# localversion* (files without backups, containing '~') 904# $(CONFIG_LOCALVERSION) (from kernel config setting) 905# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 906# ./scripts/setlocalversion (SCM tag, if one exists) 907# $(LOCALVERSION) (from make command line if provided) 908# 909# Note how the final $(localver-auto) string is included *only* if the 910# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 911# moment, only git is supported but other SCMs can edit the script 912# scripts/setlocalversion and add the appropriate checks as needed. 913 914pattern = ".*/localversion[^~]*" 915string = $(shell cat /dev/null \ 916 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 917 918localver = $(subst $(space),, $(string) \ 919 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 920 921# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 922# and if the SCM is know a tag from the SCM is appended. 923# The appended tag is determined by the SCM used. 924# 925# Currently, only git is supported. 926# Other SCMs can edit scripts/setlocalversion and add the appropriate 927# checks as needed. 928ifdef CONFIG_LOCALVERSION_AUTO 929 _localver-auto = $(shell $(CONFIG_SHELL) \ 930 $(srctree)/scripts/setlocalversion $(srctree)) 931 localver-auto = $(LOCALVERSION)$(_localver-auto) 932endif 933 934localver-full = $(localver)$(localver-auto) 935 936# Store (new) KERNELRELASE string in include/config/kernel.release 937kernelrelease = $(KERNELVERSION)$(localver-full) 938include/config/kernel.release: include/config/auto.conf FORCE 939 $(Q)rm -f $@ 940 $(Q)echo $(kernelrelease) > $@ 941 942 943# Things we need to do before we recursively start building the kernel 944# or the modules are listed in "prepare". 945# A multi level approach is used. prepareN is processed before prepareN-1. 946# archprepare is used in arch Makefiles and when processed asm symlink, 947# version.h and scripts_basic is processed / created. 948 949# Listed in dependency order 950PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 951 952# prepare3 is used to check if we are building in a separate output directory, 953# and if so do: 954# 1) Check that make has not been executed in the kernel src $(srctree) 955# 2) Create the include2 directory, used for the second asm symlink 956prepare3: include/config/kernel.release 957ifneq ($(KBUILD_SRC),) 958 @$(kecho) ' Using $(srctree) as source for kernel' 959 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 960 echo " $(srctree) is not clean, please run 'make mrproper'";\ 961 echo " in the '$(srctree)' directory.";\ 962 /bin/false; \ 963 fi; 964 $(Q)if [ ! -d include2 ]; then \ 965 mkdir -p include2; \ 966 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 967 fi 968endif 969 970# prepare2 creates a makefile if using a separate output directory 971prepare2: prepare3 outputmakefile 972 973prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 974 include/asm include/config/auto.conf 975 $(cmd_crmodverdir) 976 977archprepare: prepare1 scripts_basic 978 979prepare0: archprepare FORCE 980 $(Q)$(MAKE) $(build)=. 981 $(Q)$(MAKE) $(build)=. missing-syscalls 982 983# All the preparing.. 984prepare: prepare0 985 986# Leave this as default for preprocessing vmlinux.lds.S, which is now 987# done in arch/$(ARCH)/kernel/Makefile 988 989export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 990 991# The asm symlink changes when $(ARCH) changes. 992# Detect this and ask user to run make mrproper 993# If asm is a stale symlink (point to dir that does not exist) remove it 994define check-symlink 995 set -e; \ 996 if [ -L include/asm ]; then \ 997 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 998 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 999 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 1000 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 1001 exit 1; \ 1002 fi; \ 1003 test -e $$asmlink || rm include/asm; \ 1004 elif [ -d include/asm ]; then \ 1005 echo "ERROR: $@ is a directory but a symlink was expected";\ 1006 exit 1; \ 1007 fi 1008endef 1009 1010# We create the target directory of the symlink if it does 1011# not exist so the test in chack-symlink works and we have a 1012# directory for generated filesas used by some architectures. 1013define create-symlink 1014 if [ ! -L include/asm ]; then \ 1015 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1016 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1017 mkdir -p include/asm-$(SRCARCH); \ 1018 fi; \ 1019 ln -fsn asm-$(SRCARCH) $@; \ 1020 fi 1021endef 1022 1023include/asm: FORCE 1024 $(Q)$(check-symlink) 1025 $(Q)$(create-symlink) 1026 1027# Generate some files 1028# --------------------------------------------------------------------------- 1029 1030# KERNELRELEASE can change from a few different places, meaning version.h 1031# needs to be updated, so this check is forced on all builds 1032 1033uts_len := 64 1034define filechk_utsrelease.h 1035 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1036 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1037 exit 1; \ 1038 fi; \ 1039 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1040endef 1041 1042define filechk_version.h 1043 (echo \#define LINUX_VERSION_CODE $(shell \ 1044 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1045 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1046endef 1047 1048include/linux/version.h: $(srctree)/Makefile FORCE 1049 $(call filechk,version.h) 1050 1051include/linux/utsrelease.h: include/config/kernel.release FORCE 1052 $(call filechk,utsrelease.h) 1053 1054PHONY += headerdep 1055headerdep: 1056 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1057 1058# --------------------------------------------------------------------------- 1059 1060PHONY += depend dep 1061depend dep: 1062 @echo '*** Warning: make $@ is unnecessary now.' 1063 1064# --------------------------------------------------------------------------- 1065# Firmware install 1066INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1067export INSTALL_FW_PATH 1068 1069PHONY += firmware_install 1070firmware_install: FORCE 1071 @mkdir -p $(objtree)/firmware 1072 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1073 1074# --------------------------------------------------------------------------- 1075# Kernel headers 1076 1077#Default location for installed headers 1078export INSTALL_HDR_PATH = $(objtree)/usr 1079 1080hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1081# Find out where the Kbuild file is located to support 1082# arch/$(ARCH)/include/asm 1083hdr-dir = $(strip \ 1084 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1085 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1086 1087# If we do an all arch process set dst to asm-$(hdr-arch) 1088hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1089 1090PHONY += __headers 1091__headers: include/linux/version.h scripts_basic FORCE 1092 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1093 1094PHONY += headers_install_all 1095headers_install_all: 1096 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1097 1098PHONY += headers_install 1099headers_install: __headers 1100 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1101 $(error Headers not exportable for the $(SRCARCH) architecture)) 1102 $(Q)$(MAKE) $(hdr-inst)=include 1103 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1104 1105PHONY += headers_check_all 1106headers_check_all: headers_install_all 1107 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1108 1109PHONY += headers_check 1110headers_check: headers_install 1111 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1112 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1113 1114# --------------------------------------------------------------------------- 1115# Modules 1116 1117ifdef CONFIG_MODULES 1118 1119# By default, build modules as well 1120 1121all: modules 1122 1123# Build modules 1124# 1125# A module can be listed more than once in obj-m resulting in 1126# duplicate lines in modules.order files. Those are removed 1127# using awk while concatenating to the final file. 1128 1129PHONY += modules 1130modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1131 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1132 @$(kecho) ' Building modules, stage 2.'; 1133 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1134 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1135 1136 1137# Target to prepare building external modules 1138PHONY += modules_prepare 1139modules_prepare: prepare scripts 1140 1141# Target to install modules 1142PHONY += modules_install 1143modules_install: _modinst_ _modinst_post 1144 1145PHONY += _modinst_ 1146_modinst_: 1147 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1148 echo "Warning: you may need to install module-init-tools"; \ 1149 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1150 sleep 1; \ 1151 fi 1152 @rm -rf $(MODLIB)/kernel 1153 @rm -f $(MODLIB)/source 1154 @mkdir -p $(MODLIB)/kernel 1155 @ln -s $(srctree) $(MODLIB)/source 1156 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1157 rm -f $(MODLIB)/build ; \ 1158 ln -s $(objtree) $(MODLIB)/build ; \ 1159 fi 1160 @cp -f $(objtree)/modules.order $(MODLIB)/ 1161 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1162 1163# This depmod is only for convenience to give the initial 1164# boot a modules.dep even before / is mounted read-write. However the 1165# boot script depmod is the master version. 1166PHONY += _modinst_post 1167_modinst_post: _modinst_ 1168 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1169 $(call cmd,depmod) 1170 1171else # CONFIG_MODULES 1172 1173# Modules not configured 1174# --------------------------------------------------------------------------- 1175 1176modules modules_install: FORCE 1177 @echo 1178 @echo "The present kernel configuration has modules disabled." 1179 @echo "Type 'make config' and enable loadable module support." 1180 @echo "Then build a kernel with module support enabled." 1181 @echo 1182 @exit 1 1183 1184endif # CONFIG_MODULES 1185 1186### 1187# Cleaning is done on three levels. 1188# make clean Delete most generated files 1189# Leave enough to build external modules 1190# make mrproper Delete the current configuration, and all generated files 1191# make distclean Remove editor backup files, patch leftover files and the like 1192 1193# Directories & files removed with 'make clean' 1194CLEAN_DIRS += $(MODVERDIR) 1195CLEAN_FILES += vmlinux System.map \ 1196 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1197 1198# Directories & files removed with 'make mrproper' 1199MRPROPER_DIRS += include/config include2 usr/include 1200MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1201 include/linux/autoconf.h include/linux/version.h \ 1202 include/linux/utsrelease.h \ 1203 include/linux/bounds.h include/asm*/asm-offsets.h \ 1204 Module.symvers Module.markers tags TAGS cscope* 1205 1206# clean - Delete most, but leave enough to build external modules 1207# 1208clean: rm-dirs := $(CLEAN_DIRS) 1209clean: rm-files := $(CLEAN_FILES) 1210clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1211 1212PHONY += $(clean-dirs) clean archclean 1213$(clean-dirs): 1214 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1215 1216clean: archclean $(clean-dirs) 1217 $(call cmd,rmdirs) 1218 $(call cmd,rmfiles) 1219 @find . $(RCS_FIND_IGNORE) \ 1220 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1221 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1222 -o -name '*.symtypes' -o -name 'modules.order' \ 1223 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1224 -type f -print | xargs rm -f 1225 1226# mrproper - Delete all generated files, including .config 1227# 1228mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1229mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1230mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1231 1232PHONY += $(mrproper-dirs) mrproper archmrproper 1233$(mrproper-dirs): 1234 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1235 1236mrproper: clean archmrproper $(mrproper-dirs) 1237 $(call cmd,rmdirs) 1238 $(call cmd,rmfiles) 1239 1240# distclean 1241# 1242PHONY += distclean 1243 1244distclean: mrproper 1245 @find $(srctree) $(RCS_FIND_IGNORE) \ 1246 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1247 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1248 -o -name '.*.rej' -o -size 0 \ 1249 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1250 -type f -print | xargs rm -f 1251 1252 1253# Packaging of the kernel to various formats 1254# --------------------------------------------------------------------------- 1255# rpm target kept for backward compatibility 1256package-dir := $(srctree)/scripts/package 1257 1258%pkg: include/config/kernel.release FORCE 1259 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1260rpm: include/config/kernel.release FORCE 1261 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1262 1263 1264# Brief documentation of the typical targets used 1265# --------------------------------------------------------------------------- 1266 1267boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1268boards := $(notdir $(boards)) 1269board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1270board-dirs := $(sort $(notdir $(board-dirs:/=))) 1271 1272help: 1273 @echo 'Cleaning targets:' 1274 @echo ' clean - Remove most generated files but keep the config and' 1275 @echo ' enough build support to build external modules' 1276 @echo ' mrproper - Remove all generated files + config + various backup files' 1277 @echo ' distclean - mrproper + remove editor backup and patch files' 1278 @echo '' 1279 @echo 'Configuration targets:' 1280 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1281 @echo '' 1282 @echo 'Other generic targets:' 1283 @echo ' all - Build all targets marked with [*]' 1284 @echo '* vmlinux - Build the bare kernel' 1285 @echo '* modules - Build all modules' 1286 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1287 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1288 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1289 @echo ' dir/ - Build all files in dir and below' 1290 @echo ' dir/file.[ois] - Build specified target only' 1291 @echo ' dir/file.ko - Build module including final link' 1292 @echo ' prepare - Set up for building external modules' 1293 @echo ' tags/TAGS - Generate tags file for editors' 1294 @echo ' cscope - Generate cscope index' 1295 @echo ' kernelrelease - Output the release version string' 1296 @echo ' kernelversion - Output the version stored in Makefile' 1297 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1298 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1299 echo '' 1300 @echo 'Static analysers' 1301 @echo ' checkstack - Generate a list of stack hogs' 1302 @echo ' namespacecheck - Name space analysis on compiled kernel' 1303 @echo ' versioncheck - Sanity check on version.h usage' 1304 @echo ' includecheck - Check for duplicate included header files' 1305 @echo ' export_report - List the usages of all exported symbols' 1306 @echo ' headers_check - Sanity check on exported headers' 1307 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1308 echo '' 1309 @echo 'Kernel packaging:' 1310 @$(MAKE) $(build)=$(package-dir) help 1311 @echo '' 1312 @echo 'Documentation targets:' 1313 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1314 @echo '' 1315 @echo 'Architecture specific targets ($(SRCARCH)):' 1316 @$(if $(archhelp),$(archhelp),\ 1317 echo ' No architecture specific help defined for $(SRCARCH)') 1318 @echo '' 1319 @$(if $(boards), \ 1320 $(foreach b, $(boards), \ 1321 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1322 echo '') 1323 @$(if $(board-dirs), \ 1324 $(foreach b, $(board-dirs), \ 1325 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1326 printf " %-16s - Show all of the above\\n" help-boards; \ 1327 echo '') 1328 1329 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1330 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1331 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1332 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1333 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1334 @echo '' 1335 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1336 @echo 'For further info see the ./README file' 1337 1338 1339help-board-dirs := $(addprefix help-,$(board-dirs)) 1340 1341help-boards: $(help-board-dirs) 1342 1343boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1344 1345$(help-board-dirs): help-%: 1346 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1347 @$(if $(boards-per-dir), \ 1348 $(foreach b, $(boards-per-dir), \ 1349 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1350 echo '') 1351 1352 1353# Documentation targets 1354# --------------------------------------------------------------------------- 1355%docs: scripts_basic FORCE 1356 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1357 1358else # KBUILD_EXTMOD 1359 1360### 1361# External module support. 1362# When building external modules the kernel used as basis is considered 1363# read-only, and no consistency checks are made and the make 1364# system is not used on the basis kernel. If updates are required 1365# in the basis kernel ordinary make commands (without M=...) must 1366# be used. 1367# 1368# The following are the only valid targets when building external 1369# modules. 1370# make M=dir clean Delete all automatically generated files 1371# make M=dir modules Make all modules in specified dir 1372# make M=dir Same as 'make M=dir modules' 1373# make M=dir modules_install 1374# Install the modules built in the module directory 1375# Assumes install directory is already created 1376 1377# We are always building modules 1378KBUILD_MODULES := 1 1379PHONY += crmodverdir 1380crmodverdir: 1381 $(cmd_crmodverdir) 1382 1383PHONY += $(objtree)/Module.symvers 1384$(objtree)/Module.symvers: 1385 @test -e $(objtree)/Module.symvers || ( \ 1386 echo; \ 1387 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1388 echo " is missing; modules will have no dependencies and modversions."; \ 1389 echo ) 1390 1391module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1392PHONY += $(module-dirs) modules 1393$(module-dirs): crmodverdir $(objtree)/Module.symvers 1394 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1395 1396modules: $(module-dirs) 1397 @$(kecho) ' Building modules, stage 2.'; 1398 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1399 1400PHONY += modules_install 1401modules_install: _emodinst_ _emodinst_post 1402 1403install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1404PHONY += _emodinst_ 1405_emodinst_: 1406 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1407 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1408 1409PHONY += _emodinst_post 1410_emodinst_post: _emodinst_ 1411 $(call cmd,depmod) 1412 1413clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1414 1415PHONY += $(clean-dirs) clean 1416$(clean-dirs): 1417 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1418 1419clean: rm-dirs := $(MODVERDIR) 1420clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1421clean: $(clean-dirs) 1422 $(call cmd,rmdirs) 1423 $(call cmd,rmfiles) 1424 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1425 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1426 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1427 -type f -print | xargs rm -f 1428 1429help: 1430 @echo ' Building external modules.' 1431 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1432 @echo '' 1433 @echo ' modules - default target, build the module(s)' 1434 @echo ' modules_install - install the module' 1435 @echo ' clean - remove generated files in module directory only' 1436 @echo '' 1437 1438# Dummies... 1439PHONY += prepare scripts 1440prepare: ; 1441scripts: ; 1442endif # KBUILD_EXTMOD 1443 1444# Generate tags for editors 1445# --------------------------------------------------------------------------- 1446quiet_cmd_tags = GEN $@ 1447 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1448 1449tags TAGS cscope: FORCE 1450 $(call cmd,tags) 1451 1452# Scripts to check various things for consistency 1453# --------------------------------------------------------------------------- 1454 1455includecheck: 1456 find * $(RCS_FIND_IGNORE) \ 1457 -name '*.[hcS]' -type f -print | sort \ 1458 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1459 1460versioncheck: 1461 find * $(RCS_FIND_IGNORE) \ 1462 -name '*.[hcS]' -type f -print | sort \ 1463 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1464 1465namespacecheck: 1466 $(PERL) $(srctree)/scripts/namespace.pl 1467 1468export_report: 1469 $(PERL) $(srctree)/scripts/export_report.pl 1470 1471endif #ifeq ($(config-targets),1) 1472endif #ifeq ($(mixed-targets),1) 1473 1474PHONY += checkstack kernelrelease kernelversion 1475 1476# UML needs a little special treatment here. It wants to use the host 1477# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1478# else wants $(ARCH), including people doing cross-builds, which means 1479# that $(SUBARCH) doesn't work here. 1480ifeq ($(ARCH), um) 1481CHECKSTACK_ARCH := $(SUBARCH) 1482else 1483CHECKSTACK_ARCH := $(ARCH) 1484endif 1485checkstack: 1486 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1487 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1488 1489kernelrelease: 1490 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1491 $(error kernelrelease not valid - run 'make prepare' to update it)) 1492kernelversion: 1493 @echo $(KERNELVERSION) 1494 1495# Single targets 1496# --------------------------------------------------------------------------- 1497# Single targets are compatible with: 1498# - build with mixed source and output 1499# - build with separate output dir 'make O=...' 1500# - external modules 1501# 1502# target-dir => where to store outputfile 1503# build-dir => directory in kernel source tree to use 1504 1505ifeq ($(KBUILD_EXTMOD),) 1506 build-dir = $(patsubst %/,%,$(dir $@)) 1507 target-dir = $(dir $@) 1508else 1509 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1510 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1511 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1512endif 1513 1514%.s: %.c prepare scripts FORCE 1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1516%.i: %.c prepare scripts FORCE 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1518%.o: %.c prepare scripts FORCE 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1520%.lst: %.c prepare scripts FORCE 1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1522%.s: %.S prepare scripts FORCE 1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1524%.o: %.S prepare scripts FORCE 1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1526%.symtypes: %.c prepare scripts FORCE 1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1528 1529# Modules 1530/: prepare scripts FORCE 1531 $(cmd_crmodverdir) 1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1533 $(build)=$(build-dir) 1534%/: prepare scripts FORCE 1535 $(cmd_crmodverdir) 1536 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1537 $(build)=$(build-dir) 1538%.ko: prepare scripts FORCE 1539 $(cmd_crmodverdir) 1540 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1541 $(build)=$(build-dir) $(@:.ko=.o) 1542 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1543 1544# FIXME Should go into a make.lib or something 1545# =========================================================================== 1546 1547quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1548 cmd_rmdirs = rm -rf $(rm-dirs) 1549 1550quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1551 cmd_rmfiles = rm -f $(rm-files) 1552 1553# Run depmod only if we have System.map and depmod is executable 1554quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1555 cmd_depmod = \ 1556 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1557 $(DEPMOD) -ae -F System.map \ 1558 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1559 $(KERNELRELEASE); \ 1560 fi 1561 1562# Create temporary dir for module support files 1563# clean it up only when building all modules 1564cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1565 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1566 1567a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1568 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1569 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1570 1571quiet_cmd_as_o_S = AS $@ 1572cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1573 1574# read all saved command lines 1575 1576targets := $(wildcard $(sort $(targets))) 1577cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1578 1579ifneq ($(cmd_files),) 1580 $(cmd_files): ; # Do not try to update included dependency files 1581 include $(cmd_files) 1582endif 1583 1584# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1585# Usage: 1586# $(Q)$(MAKE) $(clean)=dir 1587clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1588 1589endif # skip-makefile 1590 1591PHONY += FORCE 1592FORCE: 1593 1594# Declare the contents of the .PHONY variable as phony. We keep that 1595# information in a variable se we can use it in if_changed and friends. 1596.PHONY: $(PHONY) 1597