1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 32 4EXTRAVERSION = -rc8 5NAME = Man-Eating Seals of Antiquity 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 38ifeq ("$(origin V)", "command line") 39 KBUILD_VERBOSE = $(V) 40endif 41ifndef KBUILD_VERBOSE 42 KBUILD_VERBOSE = 0 43endif 44 45# Call a source code checker (by default, "sparse") as part of the 46# C compilation. 47# 48# Use 'make C=1' to enable checking of only re-compiled files. 49# Use 'make C=2' to enable checking of *all* source files, regardless 50# of whether they are re-compiled or not. 51# 52# See the file "Documentation/sparse.txt" for more details, including 53# where to get the "sparse" utility. 54 55ifeq ("$(origin C)", "command line") 56 KBUILD_CHECKSRC = $(C) 57endif 58ifndef KBUILD_CHECKSRC 59 KBUILD_CHECKSRC = 0 60endif 61 62# Use make M=dir to specify directory of external module to build 63# Old syntax make ... SUBDIRS=$PWD is still supported 64# Setting the environment variable KBUILD_EXTMOD take precedence 65ifdef SUBDIRS 66 KBUILD_EXTMOD ?= $(SUBDIRS) 67endif 68 69ifeq ("$(origin M)", "command line") 70 KBUILD_EXTMOD := $(M) 71endif 72 73# kbuild supports saving output files in a separate directory. 74# To locate output files in a separate directory two syntaxes are supported. 75# In both cases the working directory must be the root of the kernel src. 76# 1) O= 77# Use "make O=dir/to/store/output/files/" 78# 79# 2) Set KBUILD_OUTPUT 80# Set the environment variable KBUILD_OUTPUT to point to the directory 81# where the output files shall be placed. 82# export KBUILD_OUTPUT=dir/to/store/output/files/ 83# make 84# 85# The O= assignment takes precedence over the KBUILD_OUTPUT environment 86# variable. 87 88 89# KBUILD_SRC is set on invocation of make in OBJ directory 90# KBUILD_SRC is not intended to be used by the regular user (for now) 91ifeq ($(KBUILD_SRC),) 92 93# OK, Make called in directory where kernel src resides 94# Do we want to locate output files in a separate directory? 95ifeq ("$(origin O)", "command line") 96 KBUILD_OUTPUT := $(O) 97endif 98 99# That's our default target when none is given on the command line 100PHONY := _all 101_all: 102 103# Cancel implicit rules on top Makefile 104$(CURDIR)/Makefile Makefile: ; 105 106ifneq ($(KBUILD_OUTPUT),) 107# Invoke a second make in the output directory, passing relevant variables 108# check that the output directory actually exists 109saved-output := $(KBUILD_OUTPUT) 110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 111$(if $(KBUILD_OUTPUT),, \ 112 $(error output directory "$(saved-output)" does not exist)) 113 114PHONY += $(MAKECMDGOALS) sub-make 115 116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 117 $(Q)@: 118 119sub-make: FORCE 120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 121 KBUILD_SRC=$(CURDIR) \ 122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 123 $(filter-out _all sub-make,$(MAKECMDGOALS)) 124 125# Leave processing to above invocation of make 126skip-makefile := 1 127endif # ifneq ($(KBUILD_OUTPUT),) 128endif # ifeq ($(KBUILD_SRC),) 129 130# We process the rest of the Makefile if this is the final invocation of make 131ifeq ($(skip-makefile),) 132 133# If building an external module we do not care about the all: rule 134# but instead _all depend on modules 135PHONY += all 136ifeq ($(KBUILD_EXTMOD),) 137_all: all 138else 139_all: modules 140endif 141 142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 143objtree := $(CURDIR) 144src := $(srctree) 145obj := $(objtree) 146 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 148 149export srctree objtree VPATH 150 151 152# SUBARCH tells the usermode build what the underlying arch is. That is set 153# first, and if a usermode build is happening, the "ARCH=um" on the command 154# line overrides the setting of ARCH below. If a native build is happening, 155# then ARCH is assigned, getting whatever value it gets normally, and 156# SUBARCH is subsequently ignored. 157 158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 159 -e s/arm.*/arm/ -e s/sa110/arm/ \ 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 162 -e s/sh[234].*/sh/ ) 163 164# Cross compiling and selecting different set of gcc/bin-utils 165# --------------------------------------------------------------------------- 166# 167# When performing cross compilation for other architectures ARCH shall be set 168# to the target architecture. (See arch/* for the possibilities). 169# ARCH can be set during invocation of make: 170# make ARCH=ia64 171# Another way is to have ARCH set in the environment. 172# The default ARCH is the host where make is executed. 173 174# CROSS_COMPILE specify the prefix used for all executables used 175# during compilation. Only gcc and related bin-utils executables 176# are prefixed with $(CROSS_COMPILE). 177# CROSS_COMPILE can be set on the command line 178# make CROSS_COMPILE=ia64-linux- 179# Alternatively CROSS_COMPILE can be set in the environment. 180# Default value for CROSS_COMPILE is not to prefix executables 181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 182export KBUILD_BUILDHOST := $(SUBARCH) 183ARCH ?= $(SUBARCH) 184CROSS_COMPILE ?= 185 186# Architecture as present in compile.h 187UTS_MACHINE := $(ARCH) 188SRCARCH := $(ARCH) 189 190# Additional ARCH settings for x86 191ifeq ($(ARCH),i386) 192 SRCARCH := x86 193endif 194ifeq ($(ARCH),x86_64) 195 SRCARCH := x86 196endif 197 198# Additional ARCH settings for sparc 199ifeq ($(ARCH),sparc64) 200 SRCARCH := sparc 201endif 202 203# Additional ARCH settings for sh 204ifeq ($(ARCH),sh64) 205 SRCARCH := sh 206endif 207 208# Where to locate arch specific headers 209hdr-arch := $(SRCARCH) 210 211ifeq ($(ARCH),m68knommu) 212 hdr-arch := m68k 213endif 214 215KCONFIG_CONFIG ?= .config 216 217# SHELL used by kbuild 218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 219 else if [ -x /bin/bash ]; then echo /bin/bash; \ 220 else echo sh; fi ; fi) 221 222HOSTCC = gcc 223HOSTCXX = g++ 224HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 225HOSTCXXFLAGS = -O2 226 227# Decide whether to build built-in, modular, or both. 228# Normally, just do built-in. 229 230KBUILD_MODULES := 231KBUILD_BUILTIN := 1 232 233# If we have only "make modules", don't compile built-in objects. 234# When we're building modules with modversions, we need to consider 235# the built-in objects during the descend as well, in order to 236# make sure the checksums are up to date before we record them. 237 238ifeq ($(MAKECMDGOALS),modules) 239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 240endif 241 242# If we have "make <whatever> modules", compile modules 243# in addition to whatever we do anyway. 244# Just "make" or "make all" shall build modules as well 245 246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 247 KBUILD_MODULES := 1 248endif 249 250ifeq ($(MAKECMDGOALS),) 251 KBUILD_MODULES := 1 252endif 253 254export KBUILD_MODULES KBUILD_BUILTIN 255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 256 257# Beautify output 258# --------------------------------------------------------------------------- 259# 260# Normally, we echo the whole command before executing it. By making 261# that echo $($(quiet)$(cmd)), we now have the possibility to set 262# $(quiet) to choose other forms of output instead, e.g. 263# 264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 266# 267# If $(quiet) is empty, the whole command will be printed. 268# If it is set to "quiet_", only the short version will be printed. 269# If it is set to "silent_", nothing will be printed at all, since 270# the variable $(silent_cmd_cc_o_c) doesn't exist. 271# 272# A simple variant is to prefix commands with $(Q) - that's useful 273# for commands that shall be hidden in non-verbose mode. 274# 275# $(Q)ln $@ :< 276# 277# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 278# If KBUILD_VERBOSE equals 1 then the above command is displayed. 279 280ifeq ($(KBUILD_VERBOSE),1) 281 quiet = 282 Q = 283else 284 quiet=quiet_ 285 Q = @ 286endif 287 288# If the user is running make -s (silent mode), suppress echoing of 289# commands 290 291ifneq ($(findstring s,$(MAKEFLAGS)),) 292 quiet=silent_ 293endif 294 295export quiet Q KBUILD_VERBOSE 296 297 298# Look for make include files relative to root of kernel src 299MAKEFLAGS += --include-dir=$(srctree) 300 301# We need some generic definitions (do not try to remake the file). 302$(srctree)/scripts/Kbuild.include: ; 303include $(srctree)/scripts/Kbuild.include 304 305# Make variables (CC, etc...) 306 307AS = $(CROSS_COMPILE)as 308LD = $(CROSS_COMPILE)ld 309CC = $(CROSS_COMPILE)gcc 310CPP = $(CC) -E 311AR = $(CROSS_COMPILE)ar 312NM = $(CROSS_COMPILE)nm 313STRIP = $(CROSS_COMPILE)strip 314OBJCOPY = $(CROSS_COMPILE)objcopy 315OBJDUMP = $(CROSS_COMPILE)objdump 316AWK = awk 317GENKSYMS = scripts/genksyms/genksyms 318INSTALLKERNEL := installkernel 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 = -T $(srctree)/scripts/module-common.lds 330CFLAGS_KERNEL = 331AFLAGS_KERNEL = 332CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 333 334 335# Use LINUXINCLUDE when you must reference the include/ directory. 336# Needed to be compatible with the O= option 337LINUXINCLUDE := -Iinclude \ 338 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 339 -I$(srctree)/arch/$(hdr-arch)/include \ 340 -include include/linux/autoconf.h 341 342KBUILD_CPPFLAGS := -D__KERNEL__ 343 344KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 345 -fno-strict-aliasing -fno-common \ 346 -Werror-implicit-function-declaration \ 347 -Wno-format-security \ 348 -fno-delete-null-pointer-checks 349KBUILD_AFLAGS := -D__ASSEMBLY__ 350 351# Read KERNELRELEASE from include/config/kernel.release (if it exists) 352KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 353KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 354 355export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 356export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 357export CPP AR NM STRIP OBJCOPY OBJDUMP 358export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 360 361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 363export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 364 365# When compiling out-of-tree modules, put MODVERDIR in the module 366# tree rather than in the kernel tree. The kernel tree might 367# even be read-only. 368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 369 370# Files to ignore in find ... statements 371 372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 374 375# =========================================================================== 376# Rules shared between *config targets and build targets 377 378# Basic helpers built in scripts/ 379PHONY += scripts_basic 380scripts_basic: 381 $(Q)$(MAKE) $(build)=scripts/basic 382 383# To avoid any implicit rule to kick in, define an empty command. 384scripts/basic/%: scripts_basic ; 385 386PHONY += outputmakefile 387# outputmakefile generates a Makefile in the output directory, if using a 388# separate output directory. This allows convenient use of make in the 389# output directory. 390outputmakefile: 391ifneq ($(KBUILD_SRC),) 392 $(Q)ln -fsn $(srctree) source 393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 395endif 396 397# To make sure we do not include .config for any of the *config targets 398# catch them early, and hand them over to scripts/kconfig/Makefile 399# It is allowed to specify more targets when calling make, including 400# mixing *config targets and build targets. 401# For example 'make oldconfig all'. 402# Detect when mixed targets is specified, and make a second invocation 403# of make so .config is not included in this case either (for *config). 404 405no-dot-config-targets := clean mrproper distclean \ 406 cscope TAGS tags help %docs check% \ 407 include/linux/version.h headers_% \ 408 kernelrelease kernelversion 409 410config-targets := 0 411mixed-targets := 0 412dot-config := 1 413 414ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 416 dot-config := 0 417 endif 418endif 419 420ifeq ($(KBUILD_EXTMOD),) 421 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 422 config-targets := 1 423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 424 mixed-targets := 1 425 endif 426 endif 427endif 428 429ifeq ($(mixed-targets),1) 430# =========================================================================== 431# We're called with mixed targets (*config and build targets). 432# Handle them one by one. 433 434%:: FORCE 435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 436 437else 438ifeq ($(config-targets),1) 439# =========================================================================== 440# *config targets only - make sure prerequisites are updated, and descend 441# in scripts/kconfig to make the *config target 442 443# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 444# KBUILD_DEFCONFIG may point out an alternative default configuration 445# used for 'make defconfig' 446include $(srctree)/arch/$(SRCARCH)/Makefile 447export KBUILD_DEFCONFIG KBUILD_KCONFIG 448 449config: scripts_basic outputmakefile FORCE 450 $(Q)mkdir -p include/linux include/config 451 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 452 453%config: scripts_basic outputmakefile FORCE 454 $(Q)mkdir -p include/linux include/config 455 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 456 457else 458# =========================================================================== 459# Build targets only - this includes vmlinux, arch specific targets, clean 460# targets and others. In general all targets except *config targets. 461 462ifeq ($(KBUILD_EXTMOD),) 463# Additional helpers built in scripts/ 464# Carefully list dependencies so we do not try to build scripts twice 465# in parallel 466PHONY += scripts 467scripts: scripts_basic include/config/auto.conf 468 $(Q)$(MAKE) $(build)=$(@) 469 470# Objects we will link into vmlinux / subdirs we need to visit 471init-y := init/ 472drivers-y := drivers/ sound/ firmware/ 473net-y := net/ 474libs-y := lib/ 475core-y := usr/ 476endif # KBUILD_EXTMOD 477 478ifeq ($(dot-config),1) 479# Read in config 480-include include/config/auto.conf 481 482ifeq ($(KBUILD_EXTMOD),) 483# Read in dependencies to all Kconfig* files, make sure to run 484# oldconfig if changes are detected. 485-include include/config/auto.conf.cmd 486 487# To avoid any implicit rule to kick in, define an empty command 488$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 489 490# If .config is newer than include/config/auto.conf, someone tinkered 491# with it and forgot to run make oldconfig. 492# if auto.conf.cmd is missing then we are probably in a cleaned tree so 493# we execute the config step to be sure to catch updated Kconfig files 494include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 496else 497# external modules needs include/linux/autoconf.h and include/config/auto.conf 498# but do not care if they are up-to-date. Use auto.conf to trigger the test 499PHONY += include/config/auto.conf 500 501include/config/auto.conf: 502 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 503 echo; \ 504 echo " ERROR: Kernel configuration is invalid."; \ 505 echo " include/linux/autoconf.h or $@ are missing."; \ 506 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 507 echo; \ 508 /bin/false) 509 510endif # KBUILD_EXTMOD 511 512else 513# Dummy target needed, because used as prerequisite 514include/config/auto.conf: ; 515endif # $(dot-config) 516 517# The all: target is the default when no target is given on the 518# command line. 519# This allow a user to issue only 'make' to build a kernel including modules 520# Defaults vmlinux but it is usually overridden in the arch makefile 521all: vmlinux 522 523ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 524KBUILD_CFLAGS += -Os 525else 526KBUILD_CFLAGS += -O2 527endif 528 529include $(srctree)/arch/$(SRCARCH)/Makefile 530 531ifneq ($(CONFIG_FRAME_WARN),0) 532KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 533endif 534 535# Force gcc to behave correct even for buggy distributions 536ifndef CONFIG_CC_STACKPROTECTOR 537KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 538endif 539 540ifdef CONFIG_FRAME_POINTER 541KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 542else 543KBUILD_CFLAGS += -fomit-frame-pointer 544endif 545 546ifdef CONFIG_DEBUG_INFO 547KBUILD_CFLAGS += -g 548KBUILD_AFLAGS += -gdwarf-2 549endif 550 551ifdef CONFIG_FUNCTION_TRACER 552KBUILD_CFLAGS += -pg 553endif 554 555# We trigger additional mismatches with less inlining 556ifdef CONFIG_DEBUG_SECTION_MISMATCH 557KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 558endif 559 560# arch Makefile may override CC so keep this after arch Makefile is included 561NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 562CHECKFLAGS += $(NOSTDINC_FLAGS) 563 564# warn about C99 declaration after statement 565KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 566 567# disable pointer signed / unsigned warnings in gcc 4.0 568KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 569 570# disable invalid "can't wrap" optimizations for signed / pointers 571KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 572 573# revert to pre-gcc-4.4 behaviour of .eh_frame 574KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 575 576# conserve stack if available 577KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 578 579# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 580# But warn user when we do so 581warn-assign = \ 582$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 583 584ifneq ($(KCPPFLAGS),) 585 $(call warn-assign,CPPFLAGS) 586 KBUILD_CPPFLAGS += $(KCPPFLAGS) 587endif 588ifneq ($(KAFLAGS),) 589 $(call warn-assign,AFLAGS) 590 KBUILD_AFLAGS += $(KAFLAGS) 591endif 592ifneq ($(KCFLAGS),) 593 $(call warn-assign,CFLAGS) 594 KBUILD_CFLAGS += $(KCFLAGS) 595endif 596 597# Use --build-id when available. 598LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 599 $(call cc-ldoption, -Wl$(comma)--build-id,)) 600LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 601LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 602 603ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 604LDFLAGS_vmlinux += $(call ld-option, -X,) 605endif 606 607# Default kernel image to build when no specific target is given. 608# KBUILD_IMAGE may be overruled on the command line or 609# set in the environment 610# Also any assignments in arch/$(ARCH)/Makefile take precedence over 611# this default value 612export KBUILD_IMAGE ?= vmlinux 613 614# 615# INSTALL_PATH specifies where to place the updated kernel and system map 616# images. Default is /boot, but you can set it to other values 617export INSTALL_PATH ?= /boot 618 619# 620# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 621# relocations required by build roots. This is not defined in the 622# makefile but the argument can be passed to make if needed. 623# 624 625MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 626export MODLIB 627 628# 629# INSTALL_MOD_STRIP, if defined, will cause modules to be 630# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 631# the default option --strip-debug will be used. Otherwise, 632# INSTALL_MOD_STRIP will used as the options to the strip command. 633 634ifdef INSTALL_MOD_STRIP 635ifeq ($(INSTALL_MOD_STRIP),1) 636mod_strip_cmd = $(STRIP) --strip-debug 637else 638mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 639endif # INSTALL_MOD_STRIP=1 640else 641mod_strip_cmd = true 642endif # INSTALL_MOD_STRIP 643export mod_strip_cmd 644 645 646ifeq ($(KBUILD_EXTMOD),) 647core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 648 649vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 650 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 651 $(net-y) $(net-m) $(libs-y) $(libs-m))) 652 653vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 654 $(init-n) $(init-) \ 655 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 656 $(net-n) $(net-) $(libs-n) $(libs-)))) 657 658init-y := $(patsubst %/, %/built-in.o, $(init-y)) 659core-y := $(patsubst %/, %/built-in.o, $(core-y)) 660drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 661net-y := $(patsubst %/, %/built-in.o, $(net-y)) 662libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 663libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 664libs-y := $(libs-y1) $(libs-y2) 665 666# Build vmlinux 667# --------------------------------------------------------------------------- 668# vmlinux is built from the objects selected by $(vmlinux-init) and 669# $(vmlinux-main). Most are built-in.o files from top-level directories 670# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 671# Ordering when linking is important, and $(vmlinux-init) must be first. 672# 673# vmlinux 674# ^ 675# | 676# +-< $(vmlinux-init) 677# | +--< init/version.o + more 678# | 679# +--< $(vmlinux-main) 680# | +--< driver/built-in.o mm/built-in.o + more 681# | 682# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 683# 684# vmlinux version (uname -v) cannot be updated during normal 685# descending-into-subdirs phase since we do not yet know if we need to 686# update vmlinux. 687# Therefore this step is delayed until just before final link of vmlinux - 688# except in the kallsyms case where it is done just before adding the 689# symbols to the kernel. 690# 691# System.map is generated to document addresses of all kernel symbols 692 693vmlinux-init := $(head-y) $(init-y) 694vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 695vmlinux-all := $(vmlinux-init) $(vmlinux-main) 696vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 697export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 698 699# Rule to link vmlinux - also used during CONFIG_KALLSYMS 700# May be overridden by arch/$(ARCH)/Makefile 701quiet_cmd_vmlinux__ ?= LD $@ 702 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 703 -T $(vmlinux-lds) $(vmlinux-init) \ 704 --start-group $(vmlinux-main) --end-group \ 705 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 706 707# Generate new vmlinux version 708quiet_cmd_vmlinux_version = GEN .version 709 cmd_vmlinux_version = set -e; \ 710 if [ ! -r .version ]; then \ 711 rm -f .version; \ 712 echo 1 >.version; \ 713 else \ 714 mv .version .old_version; \ 715 expr 0$$(cat .old_version) + 1 >.version; \ 716 fi; \ 717 $(MAKE) $(build)=init 718 719# Generate System.map 720quiet_cmd_sysmap = SYSMAP 721 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 722 723# Link of vmlinux 724# If CONFIG_KALLSYMS is set .version is already updated 725# Generate System.map and verify that the content is consistent 726# Use + in front of the vmlinux_version rule to silent warning with make -j2 727# First command is ':' to allow us to use + in front of the rule 728define rule_vmlinux__ 729 : 730 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 731 732 $(call cmd,vmlinux__) 733 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 734 735 $(Q)$(if $($(quiet)cmd_sysmap), \ 736 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 737 $(cmd_sysmap) $@ System.map; \ 738 if [ $$? -ne 0 ]; then \ 739 rm -f $@; \ 740 /bin/false; \ 741 fi; 742 $(verify_kallsyms) 743endef 744 745 746ifdef CONFIG_KALLSYMS 747# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 748# It's a three stage process: 749# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 750# empty 751# Running kallsyms on that gives us .tmp_kallsyms1.o with 752# the right size - vmlinux version (uname -v) is updated during this step 753# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 754# but due to the added section, some addresses have shifted. 755# From here, we generate a correct .tmp_kallsyms2.o 756# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 757# o Verify that the System.map from vmlinux matches the map from 758# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 759# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 760# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 761# temporary bypass to allow the kernel to be built while the 762# maintainers work out what went wrong with kallsyms. 763 764ifdef CONFIG_KALLSYMS_EXTRA_PASS 765last_kallsyms := 3 766else 767last_kallsyms := 2 768endif 769 770kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 771 772define verify_kallsyms 773 $(Q)$(if $($(quiet)cmd_sysmap), \ 774 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 775 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 776 $(Q)cmp -s System.map .tmp_System.map || \ 777 (echo Inconsistent kallsyms data; \ 778 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 779 rm .tmp_kallsyms* ; /bin/false ) 780endef 781 782# Update vmlinux version before link 783# Use + in front of this rule to silent warning about make -j1 784# First command is ':' to allow us to use + in front of this rule 785cmd_ksym_ld = $(cmd_vmlinux__) 786define rule_ksym_ld 787 : 788 +$(call cmd,vmlinux_version) 789 $(call cmd,vmlinux__) 790 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 791endef 792 793# Generate .S file with all kernel symbols 794quiet_cmd_kallsyms = KSYM $@ 795 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 796 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 797 798.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 799 $(call if_changed_dep,as_o_S) 800 801.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 802 $(call cmd,kallsyms) 803 804# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 805.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 806 $(call if_changed_rule,ksym_ld) 807 808.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 809 $(call if_changed,vmlinux__) 810 811.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 812 $(call if_changed,vmlinux__) 813 814# Needs to visit scripts/ before $(KALLSYMS) can be used. 815$(KALLSYMS): scripts ; 816 817# Generate some data for debugging strange kallsyms problems 818debug_kallsyms: .tmp_map$(last_kallsyms) 819 820.tmp_map%: .tmp_vmlinux% FORCE 821 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 822 823.tmp_map3: .tmp_map2 824 825.tmp_map2: .tmp_map1 826 827endif # ifdef CONFIG_KALLSYMS 828 829# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 830# relevant sections renamed as per the linker script. 831quiet_cmd_vmlinux-modpost = LD $@ 832 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 833 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 834 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 835define rule_vmlinux-modpost 836 : 837 +$(call cmd,vmlinux-modpost) 838 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 839 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 840endef 841 842# vmlinux image - including updated kernel symbols 843vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 844ifdef CONFIG_HEADERS_CHECK 845 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 846endif 847ifdef CONFIG_SAMPLES 848 $(Q)$(MAKE) $(build)=samples 849endif 850ifdef CONFIG_BUILD_DOCSRC 851 $(Q)$(MAKE) $(build)=Documentation 852endif 853 $(call vmlinux-modpost) 854 $(call if_changed_rule,vmlinux__) 855 $(Q)rm -f .old_version 856 857# build vmlinux.o first to catch section mismatch errors early 858ifdef CONFIG_KALLSYMS 859.tmp_vmlinux1: vmlinux.o 860endif 861 862modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 863vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 864 $(call if_changed_rule,vmlinux-modpost) 865 866# The actual objects are generated when descending, 867# make sure no implicit rule kicks in 868$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 869 870# Handle descending into subdirectories listed in $(vmlinux-dirs) 871# Preset locale variables to speed up the build process. Limit locale 872# tweaks to this spot to avoid wrong language settings when running 873# make menuconfig etc. 874# Error messages still appears in the original language 875 876PHONY += $(vmlinux-dirs) 877$(vmlinux-dirs): prepare scripts 878 $(Q)$(MAKE) $(build)=$@ 879 880# Build the kernel release string 881# 882# The KERNELRELEASE value built here is stored in the file 883# include/config/kernel.release, and is used when executing several 884# make targets, such as "make install" or "make modules_install." 885# 886# The eventual kernel release string consists of the following fields, 887# shown in a hierarchical format to show how smaller parts are concatenated 888# to form the larger and final value, with values coming from places like 889# the Makefile, kernel config options, make command line options and/or 890# SCM tag information. 891# 892# $(KERNELVERSION) 893# $(VERSION) eg, 2 894# $(PATCHLEVEL) eg, 6 895# $(SUBLEVEL) eg, 18 896# $(EXTRAVERSION) eg, -rc6 897# $(localver-full) 898# $(localver) 899# localversion* (files without backups, containing '~') 900# $(CONFIG_LOCALVERSION) (from kernel config setting) 901# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 902# ./scripts/setlocalversion (SCM tag, if one exists) 903# $(LOCALVERSION) (from make command line if provided) 904# 905# Note how the final $(localver-auto) string is included *only* if the 906# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 907# moment, only git is supported but other SCMs can edit the script 908# scripts/setlocalversion and add the appropriate checks as needed. 909 910pattern = ".*/localversion[^~]*" 911string = $(shell cat /dev/null \ 912 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 913 914localver = $(subst $(space),, $(string) \ 915 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 916 917# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 918# and if the SCM is know a tag from the SCM is appended. 919# The appended tag is determined by the SCM used. 920# 921# .scmversion is used when generating rpm packages so we do not loose 922# the version information from the SCM when we do the build of the kernel 923# from the copied source 924ifdef CONFIG_LOCALVERSION_AUTO 925 926ifeq ($(wildcard .scmversion),) 927 _localver-auto = $(shell $(CONFIG_SHELL) \ 928 $(srctree)/scripts/setlocalversion $(srctree)) 929else 930 _localver-auto = $(shell cat .scmversion 2> /dev/null) 931endif 932 933 localver-auto = $(LOCALVERSION)$(_localver-auto) 934endif 935 936localver-full = $(localver)$(localver-auto) 937 938# Store (new) KERNELRELASE string in include/config/kernel.release 939kernelrelease = $(KERNELVERSION)$(localver-full) 940include/config/kernel.release: include/config/auto.conf FORCE 941 $(Q)rm -f $@ 942 $(Q)echo $(kernelrelease) > $@ 943 944 945# Things we need to do before we recursively start building the kernel 946# or the modules are listed in "prepare". 947# A multi level approach is used. prepareN is processed before prepareN-1. 948# archprepare is used in arch Makefiles and when processed asm symlink, 949# version.h and scripts_basic is processed / created. 950 951# Listed in dependency order 952PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 953 954# prepare3 is used to check if we are building in a separate output directory, 955# and if so do: 956# 1) Check that make has not been executed in the kernel src $(srctree) 957# 2) Create the include2 directory, used for the second asm symlink 958prepare3: include/config/kernel.release 959ifneq ($(KBUILD_SRC),) 960 @$(kecho) ' Using $(srctree) as source for kernel' 961 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 962 echo " $(srctree) is not clean, please run 'make mrproper'";\ 963 echo " in the '$(srctree)' directory.";\ 964 /bin/false; \ 965 fi; 966 $(Q)if [ ! -d include2 ]; then \ 967 mkdir -p include2; \ 968 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 969 fi 970endif 971 972# prepare2 creates a makefile if using a separate output directory 973prepare2: prepare3 outputmakefile 974 975prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 976 include/asm include/config/auto.conf 977 $(cmd_crmodverdir) 978 979archprepare: prepare1 scripts_basic 980 981prepare0: archprepare FORCE 982 $(Q)$(MAKE) $(build)=. 983 $(Q)$(MAKE) $(build)=. missing-syscalls 984 985# All the preparing.. 986prepare: prepare0 987 988# The asm symlink changes when $(ARCH) changes. 989# Detect this and ask user to run make mrproper 990# If asm is a stale symlink (point to dir that does not exist) remove it 991define check-symlink 992 set -e; \ 993 if [ -L include/asm ]; then \ 994 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 995 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 996 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 997 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 998 exit 1; \ 999 fi; \ 1000 test -e $$asmlink || rm include/asm; \ 1001 elif [ -d include/asm ]; then \ 1002 echo "ERROR: $@ is a directory but a symlink was expected";\ 1003 exit 1; \ 1004 fi 1005endef 1006 1007# We create the target directory of the symlink if it does 1008# not exist so the test in check-symlink works and we have a 1009# directory for generated filesas used by some architectures. 1010define create-symlink 1011 if [ ! -L include/asm ]; then \ 1012 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1013 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1014 mkdir -p include/asm-$(SRCARCH); \ 1015 fi; \ 1016 ln -fsn asm-$(SRCARCH) $@; \ 1017 fi 1018endef 1019 1020include/asm: FORCE 1021 $(Q)$(check-symlink) 1022 $(Q)$(create-symlink) 1023 1024# Generate some files 1025# --------------------------------------------------------------------------- 1026 1027# KERNELRELEASE can change from a few different places, meaning version.h 1028# needs to be updated, so this check is forced on all builds 1029 1030uts_len := 64 1031define filechk_utsrelease.h 1032 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1033 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1034 exit 1; \ 1035 fi; \ 1036 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1037endef 1038 1039define filechk_version.h 1040 (echo \#define LINUX_VERSION_CODE $(shell \ 1041 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1042 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1043endef 1044 1045include/linux/version.h: $(srctree)/Makefile FORCE 1046 $(call filechk,version.h) 1047 1048include/linux/utsrelease.h: include/config/kernel.release FORCE 1049 $(call filechk,utsrelease.h) 1050 1051PHONY += headerdep 1052headerdep: 1053 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1054 1055# --------------------------------------------------------------------------- 1056 1057PHONY += depend dep 1058depend dep: 1059 @echo '*** Warning: make $@ is unnecessary now.' 1060 1061# --------------------------------------------------------------------------- 1062# Firmware install 1063INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1064export INSTALL_FW_PATH 1065 1066PHONY += firmware_install 1067firmware_install: FORCE 1068 @mkdir -p $(objtree)/firmware 1069 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1070 1071# --------------------------------------------------------------------------- 1072# Kernel headers 1073 1074#Default location for installed headers 1075export INSTALL_HDR_PATH = $(objtree)/usr 1076 1077hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1078# Find out where the Kbuild file is located to support 1079# arch/$(ARCH)/include/asm 1080hdr-dir = $(strip \ 1081 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1082 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1083 1084# If we do an all arch process set dst to asm-$(hdr-arch) 1085hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1086 1087PHONY += __headers 1088__headers: include/linux/version.h scripts_basic FORCE 1089 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1090 1091PHONY += headers_install_all 1092headers_install_all: 1093 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1094 1095PHONY += headers_install 1096headers_install: __headers 1097 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1098 $(error Headers not exportable for the $(SRCARCH) architecture)) 1099 $(Q)$(MAKE) $(hdr-inst)=include 1100 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1101 1102PHONY += headers_check_all 1103headers_check_all: headers_install_all 1104 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1105 1106PHONY += headers_check 1107headers_check: headers_install 1108 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1109 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1110 1111# --------------------------------------------------------------------------- 1112# Modules 1113 1114ifdef CONFIG_MODULES 1115 1116# By default, build modules as well 1117 1118all: modules 1119 1120# Build modules 1121# 1122# A module can be listed more than once in obj-m resulting in 1123# duplicate lines in modules.order files. Those are removed 1124# using awk while concatenating to the final file. 1125 1126PHONY += modules 1127modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1128 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1129 @$(kecho) ' Building modules, stage 2.'; 1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1132 1133 1134# Target to prepare building external modules 1135PHONY += modules_prepare 1136modules_prepare: prepare scripts 1137 1138# Target to install modules 1139PHONY += modules_install 1140modules_install: _modinst_ _modinst_post 1141 1142PHONY += _modinst_ 1143_modinst_: 1144 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1145 echo "Warning: you may need to install module-init-tools"; \ 1146 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1147 sleep 1; \ 1148 fi 1149 @rm -rf $(MODLIB)/kernel 1150 @rm -f $(MODLIB)/source 1151 @mkdir -p $(MODLIB)/kernel 1152 @ln -s $(srctree) $(MODLIB)/source 1153 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1154 rm -f $(MODLIB)/build ; \ 1155 ln -s $(objtree) $(MODLIB)/build ; \ 1156 fi 1157 @cp -f $(objtree)/modules.order $(MODLIB)/ 1158 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1159 1160# This depmod is only for convenience to give the initial 1161# boot a modules.dep even before / is mounted read-write. However the 1162# boot script depmod is the master version. 1163PHONY += _modinst_post 1164_modinst_post: _modinst_ 1165 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1166 $(call cmd,depmod) 1167 1168else # CONFIG_MODULES 1169 1170# Modules not configured 1171# --------------------------------------------------------------------------- 1172 1173modules modules_install: FORCE 1174 @echo 1175 @echo "The present kernel configuration has modules disabled." 1176 @echo "Type 'make config' and enable loadable module support." 1177 @echo "Then build a kernel with module support enabled." 1178 @echo 1179 @exit 1 1180 1181endif # CONFIG_MODULES 1182 1183### 1184# Cleaning is done on three levels. 1185# make clean Delete most generated files 1186# Leave enough to build external modules 1187# make mrproper Delete the current configuration, and all generated files 1188# make distclean Remove editor backup files, patch leftover files and the like 1189 1190# Directories & files removed with 'make clean' 1191CLEAN_DIRS += $(MODVERDIR) 1192CLEAN_FILES += vmlinux System.map \ 1193 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1194 1195# Directories & files removed with 'make mrproper' 1196MRPROPER_DIRS += include/config include2 usr/include include/generated 1197MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1198 include/linux/autoconf.h include/linux/version.h \ 1199 include/linux/utsrelease.h \ 1200 include/linux/bounds.h include/asm*/asm-offsets.h \ 1201 Module.symvers Module.markers tags TAGS cscope* 1202 1203# clean - Delete most, but leave enough to build external modules 1204# 1205clean: rm-dirs := $(CLEAN_DIRS) 1206clean: rm-files := $(CLEAN_FILES) 1207clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1208 1209PHONY += $(clean-dirs) clean archclean 1210$(clean-dirs): 1211 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1212 1213clean: archclean $(clean-dirs) 1214 $(call cmd,rmdirs) 1215 $(call cmd,rmfiles) 1216 @find . $(RCS_FIND_IGNORE) \ 1217 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1218 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1219 -o -name '*.symtypes' -o -name 'modules.order' \ 1220 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \ 1221 -o -name '*.gcno' \) -type f -print | xargs rm -f 1222 1223# mrproper - Delete all generated files, including .config 1224# 1225mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1226mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1227mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1228 1229PHONY += $(mrproper-dirs) mrproper archmrproper 1230$(mrproper-dirs): 1231 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1232 1233mrproper: clean archmrproper $(mrproper-dirs) 1234 $(call cmd,rmdirs) 1235 $(call cmd,rmfiles) 1236 1237# distclean 1238# 1239PHONY += distclean 1240 1241distclean: mrproper 1242 @find $(srctree) $(RCS_FIND_IGNORE) \ 1243 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1244 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1245 -o -name '.*.rej' -o -size 0 \ 1246 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1247 -type f -print | xargs rm -f 1248 1249 1250# Packaging of the kernel to various formats 1251# --------------------------------------------------------------------------- 1252# rpm target kept for backward compatibility 1253package-dir := $(srctree)/scripts/package 1254 1255%pkg: include/config/kernel.release FORCE 1256 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1257rpm: include/config/kernel.release FORCE 1258 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1259 1260 1261# Brief documentation of the typical targets used 1262# --------------------------------------------------------------------------- 1263 1264boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1265boards := $(notdir $(boards)) 1266board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1267board-dirs := $(sort $(notdir $(board-dirs:/=))) 1268 1269help: 1270 @echo 'Cleaning targets:' 1271 @echo ' clean - Remove most generated files but keep the config and' 1272 @echo ' enough build support to build external modules' 1273 @echo ' mrproper - Remove all generated files + config + various backup files' 1274 @echo ' distclean - mrproper + remove editor backup and patch files' 1275 @echo '' 1276 @echo 'Configuration targets:' 1277 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1278 @echo '' 1279 @echo 'Other generic targets:' 1280 @echo ' all - Build all targets marked with [*]' 1281 @echo '* vmlinux - Build the bare kernel' 1282 @echo '* modules - Build all modules' 1283 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1284 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1285 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1286 @echo ' dir/ - Build all files in dir and below' 1287 @echo ' dir/file.[ois] - Build specified target only' 1288 @echo ' dir/file.ko - Build module including final link' 1289 @echo ' modules_prepare - Set up for building external modules' 1290 @echo ' tags/TAGS - Generate tags file for editors' 1291 @echo ' cscope - Generate cscope index' 1292 @echo ' kernelrelease - Output the release version string' 1293 @echo ' kernelversion - Output the version stored in Makefile' 1294 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1295 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1296 echo '' 1297 @echo 'Static analysers' 1298 @echo ' checkstack - Generate a list of stack hogs' 1299 @echo ' namespacecheck - Name space analysis on compiled kernel' 1300 @echo ' versioncheck - Sanity check on version.h usage' 1301 @echo ' includecheck - Check for duplicate included header files' 1302 @echo ' export_report - List the usages of all exported symbols' 1303 @echo ' headers_check - Sanity check on exported headers' 1304 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1305 echo '' 1306 @echo 'Kernel packaging:' 1307 @$(MAKE) $(build)=$(package-dir) help 1308 @echo '' 1309 @echo 'Documentation targets:' 1310 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1311 @echo '' 1312 @echo 'Architecture specific targets ($(SRCARCH)):' 1313 @$(if $(archhelp),$(archhelp),\ 1314 echo ' No architecture specific help defined for $(SRCARCH)') 1315 @echo '' 1316 @$(if $(boards), \ 1317 $(foreach b, $(boards), \ 1318 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1319 echo '') 1320 @$(if $(board-dirs), \ 1321 $(foreach b, $(board-dirs), \ 1322 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1323 printf " %-16s - Show all of the above\\n" help-boards; \ 1324 echo '') 1325 1326 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1327 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1328 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1329 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1330 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1331 @echo '' 1332 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1333 @echo 'For further info see the ./README file' 1334 1335 1336help-board-dirs := $(addprefix help-,$(board-dirs)) 1337 1338help-boards: $(help-board-dirs) 1339 1340boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1341 1342$(help-board-dirs): help-%: 1343 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1344 @$(if $(boards-per-dir), \ 1345 $(foreach b, $(boards-per-dir), \ 1346 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1347 echo '') 1348 1349 1350# Documentation targets 1351# --------------------------------------------------------------------------- 1352%docs: scripts_basic FORCE 1353 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1354 1355else # KBUILD_EXTMOD 1356 1357### 1358# External module support. 1359# When building external modules the kernel used as basis is considered 1360# read-only, and no consistency checks are made and the make 1361# system is not used on the basis kernel. If updates are required 1362# in the basis kernel ordinary make commands (without M=...) must 1363# be used. 1364# 1365# The following are the only valid targets when building external 1366# modules. 1367# make M=dir clean Delete all automatically generated files 1368# make M=dir modules Make all modules in specified dir 1369# make M=dir Same as 'make M=dir modules' 1370# make M=dir modules_install 1371# Install the modules built in the module directory 1372# Assumes install directory is already created 1373 1374# We are always building modules 1375KBUILD_MODULES := 1 1376PHONY += crmodverdir 1377crmodverdir: 1378 $(cmd_crmodverdir) 1379 1380PHONY += $(objtree)/Module.symvers 1381$(objtree)/Module.symvers: 1382 @test -e $(objtree)/Module.symvers || ( \ 1383 echo; \ 1384 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1385 echo " is missing; modules will have no dependencies and modversions."; \ 1386 echo ) 1387 1388module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1389PHONY += $(module-dirs) modules 1390$(module-dirs): crmodverdir $(objtree)/Module.symvers 1391 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1392 1393modules: $(module-dirs) 1394 @$(kecho) ' Building modules, stage 2.'; 1395 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1396 1397PHONY += modules_install 1398modules_install: _emodinst_ _emodinst_post 1399 1400install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1401PHONY += _emodinst_ 1402_emodinst_: 1403 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1404 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1405 1406PHONY += _emodinst_post 1407_emodinst_post: _emodinst_ 1408 $(call cmd,depmod) 1409 1410clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1411 1412PHONY += $(clean-dirs) clean 1413$(clean-dirs): 1414 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1415 1416clean: rm-dirs := $(MODVERDIR) 1417clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1418 $(KBUILD_EXTMOD)/Module.markers \ 1419 $(KBUILD_EXTMOD)/modules.order 1420clean: $(clean-dirs) 1421 $(call cmd,rmdirs) 1422 $(call cmd,rmfiles) 1423 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1424 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1425 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1426 -o -name '*.gcno' \) -type f -print | xargs rm -f 1427 1428help: 1429 @echo ' Building external modules.' 1430 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1431 @echo '' 1432 @echo ' modules - default target, build the module(s)' 1433 @echo ' modules_install - install the module' 1434 @echo ' clean - remove generated files in module directory only' 1435 @echo '' 1436 1437# Dummies... 1438PHONY += prepare scripts 1439prepare: ; 1440scripts: ; 1441endif # KBUILD_EXTMOD 1442 1443# Generate tags for editors 1444# --------------------------------------------------------------------------- 1445quiet_cmd_tags = GEN $@ 1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1447 1448tags TAGS cscope: FORCE 1449 $(call cmd,tags) 1450 1451# Scripts to check various things for consistency 1452# --------------------------------------------------------------------------- 1453 1454includecheck: 1455 find * $(RCS_FIND_IGNORE) \ 1456 -name '*.[hcS]' -type f -print | sort \ 1457 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1458 1459versioncheck: 1460 find * $(RCS_FIND_IGNORE) \ 1461 -name '*.[hcS]' -type f -print | sort \ 1462 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1463 1464namespacecheck: 1465 $(PERL) $(srctree)/scripts/namespace.pl 1466 1467export_report: 1468 $(PERL) $(srctree)/scripts/export_report.pl 1469 1470endif #ifeq ($(config-targets),1) 1471endif #ifeq ($(mixed-targets),1) 1472 1473PHONY += checkstack kernelrelease kernelversion 1474 1475# UML needs a little special treatment here. It wants to use the host 1476# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1477# else wants $(ARCH), including people doing cross-builds, which means 1478# that $(SUBARCH) doesn't work here. 1479ifeq ($(ARCH), um) 1480CHECKSTACK_ARCH := $(SUBARCH) 1481else 1482CHECKSTACK_ARCH := $(ARCH) 1483endif 1484checkstack: 1485 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1486 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1487 1488kernelrelease: 1489 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1490 $(error kernelrelease not valid - run 'make prepare' to update it)) 1491kernelversion: 1492 @echo $(KERNELVERSION) 1493 1494# Single targets 1495# --------------------------------------------------------------------------- 1496# Single targets are compatible with: 1497# - build with mixed source and output 1498# - build with separate output dir 'make O=...' 1499# - external modules 1500# 1501# target-dir => where to store outputfile 1502# build-dir => directory in kernel source tree to use 1503 1504ifeq ($(KBUILD_EXTMOD),) 1505 build-dir = $(patsubst %/,%,$(dir $@)) 1506 target-dir = $(dir $@) 1507else 1508 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1509 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1510 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1511endif 1512 1513%.s: %.c prepare scripts FORCE 1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1515%.i: %.c prepare scripts FORCE 1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1517%.o: %.c prepare scripts FORCE 1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1519%.lst: %.c prepare scripts FORCE 1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1521%.s: %.S prepare scripts FORCE 1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1523%.o: %.S prepare scripts FORCE 1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1525%.symtypes: %.c prepare scripts FORCE 1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1527 1528# Modules 1529/: prepare scripts FORCE 1530 $(cmd_crmodverdir) 1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1532 $(build)=$(build-dir) 1533%/: prepare scripts FORCE 1534 $(cmd_crmodverdir) 1535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1536 $(build)=$(build-dir) 1537%.ko: prepare scripts FORCE 1538 $(cmd_crmodverdir) 1539 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1540 $(build)=$(build-dir) $(@:.ko=.o) 1541 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1542 1543# FIXME Should go into a make.lib or something 1544# =========================================================================== 1545 1546quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1547 cmd_rmdirs = rm -rf $(rm-dirs) 1548 1549quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1550 cmd_rmfiles = rm -f $(rm-files) 1551 1552# Run depmod only if we have System.map and depmod is executable 1553quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1554 cmd_depmod = \ 1555 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1556 $(DEPMOD) -ae -F System.map \ 1557 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1558 $(KERNELRELEASE); \ 1559 fi 1560 1561# Create temporary dir for module support files 1562# clean it up only when building all modules 1563cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1564 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1565 1566a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1567 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1568 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1569 1570quiet_cmd_as_o_S = AS $@ 1571cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1572 1573# read all saved command lines 1574 1575targets := $(wildcard $(sort $(targets))) 1576cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1577 1578ifneq ($(cmd_files),) 1579 $(cmd_files): ; # Do not try to update included dependency files 1580 include $(cmd_files) 1581endif 1582 1583# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1584# Usage: 1585# $(Q)$(MAKE) $(clean)=dir 1586clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1587 1588endif # skip-makefile 1589 1590PHONY += FORCE 1591FORCE: 1592 1593# Declare the contents of the .PHONY variable as phony. We keep that 1594# information in a variable so we can use it in if_changed and friends. 1595.PHONY: $(PHONY) 1596