1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 36 4EXTRAVERSION = 5NAME = Flesh-Eating Bats with Fangs 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# Avoid funny character set dependencies 20unexport LC_ALL 21LC_COLLATE=C 22LC_NUMERIC=C 23export LC_COLLATE LC_NUMERIC 24 25# We are using a recursive build, so we need to do a little thinking 26# to get the ordering right. 27# 28# Most importantly: sub-Makefiles should only ever modify files in 29# their own directory. If in some directory we have a dependency on 30# a file in another dir (which doesn't happen often, but it's often 31# unavoidable when linking the built-in.o targets which finally 32# turn into vmlinux), we will call a sub make in that other dir, and 33# after that we are sure that everything which is in that other dir 34# is now up to date. 35# 36# The only cases where we need to modify files which have global 37# effects are thus separated out and done before the recursive 38# descending is started. They are now explicitly listed as the 39# prepare rule. 40 41# To put more focus on warnings, be less verbose as default 42# Use 'make V=1' to see the full commands 43 44ifeq ("$(origin V)", "command line") 45 KBUILD_VERBOSE = $(V) 46endif 47ifndef KBUILD_VERBOSE 48 KBUILD_VERBOSE = 0 49endif 50 51# Call a source code checker (by default, "sparse") as part of the 52# C compilation. 53# 54# Use 'make C=1' to enable checking of only re-compiled files. 55# Use 'make C=2' to enable checking of *all* source files, regardless 56# of whether they are re-compiled or not. 57# 58# See the file "Documentation/sparse.txt" for more details, including 59# where to get the "sparse" utility. 60 61ifeq ("$(origin C)", "command line") 62 KBUILD_CHECKSRC = $(C) 63endif 64ifndef KBUILD_CHECKSRC 65 KBUILD_CHECKSRC = 0 66endif 67 68# Use make M=dir to specify directory of external module to build 69# Old syntax make ... SUBDIRS=$PWD is still supported 70# Setting the environment variable KBUILD_EXTMOD take precedence 71ifdef SUBDIRS 72 KBUILD_EXTMOD ?= $(SUBDIRS) 73endif 74 75ifeq ("$(origin M)", "command line") 76 KBUILD_EXTMOD := $(M) 77endif 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(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? 101ifeq ("$(origin O)", "command line") 102 KBUILD_OUTPUT := $(O) 103endif 104 105# That's our default target when none is given on the command line 106PHONY := _all 107_all: 108 109# Cancel implicit rules on top Makefile 110$(CURDIR)/Makefile Makefile: ; 111 112ifneq ($(KBUILD_OUTPUT),) 113# Invoke a second make in the output directory, passing relevant variables 114# check that the output directory actually exists 115saved-output := $(KBUILD_OUTPUT) 116KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 117$(if $(KBUILD_OUTPUT),, \ 118 $(error output directory "$(saved-output)" does not exist)) 119 120PHONY += $(MAKECMDGOALS) sub-make 121 122$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 123 $(Q)@: 124 125sub-make: FORCE 126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 127 KBUILD_SRC=$(CURDIR) \ 128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 129 $(filter-out _all sub-make,$(MAKECMDGOALS)) 130 131# Leave processing to above invocation of make 132skip-makefile := 1 133endif # ifneq ($(KBUILD_OUTPUT),) 134endif # ifeq ($(KBUILD_SRC),) 135 136# We process the rest of the Makefile if this is the final invocation of make 137ifeq ($(skip-makefile),) 138 139# If building an external module we do not care about the all: rule 140# but instead _all depend on modules 141PHONY += all 142ifeq ($(KBUILD_EXTMOD),) 143_all: all 144else 145_all: modules 146endif 147 148srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 149objtree := $(CURDIR) 150src := $(srctree) 151obj := $(objtree) 152 153VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 154 155export srctree objtree VPATH 156 157 158# SUBARCH tells the usermode build what the underlying arch is. That is set 159# first, and if a usermode build is happening, the "ARCH=um" on the command 160# line overrides the setting of ARCH below. If a native build is happening, 161# then ARCH is assigned, getting whatever value it gets normally, and 162# SUBARCH is subsequently ignored. 163 164SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 165 -e s/arm.*/arm/ -e s/sa110/arm/ \ 166 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 168 -e s/sh[234].*/sh/ ) 169 170# Cross compiling and selecting different set of gcc/bin-utils 171# --------------------------------------------------------------------------- 172# 173# When performing cross compilation for other architectures ARCH shall be set 174# to the target architecture. (See arch/* for the possibilities). 175# ARCH can be set during invocation of make: 176# make ARCH=ia64 177# Another way is to have ARCH set in the environment. 178# The default ARCH is the host where make is executed. 179 180# CROSS_COMPILE specify the prefix used for all executables used 181# during compilation. Only gcc and related bin-utils executables 182# are prefixed with $(CROSS_COMPILE). 183# CROSS_COMPILE can be set on the command line 184# make CROSS_COMPILE=ia64-linux- 185# Alternatively CROSS_COMPILE can be set in the environment. 186# A third alternative is to store a setting in .config so that plain 187# "make" in the configured kernel build directory always uses that. 188# Default value for CROSS_COMPILE is not to prefix executables 189# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 190export KBUILD_BUILDHOST := $(SUBARCH) 191ARCH ?= $(SUBARCH) 192CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 193 194# Architecture as present in compile.h 195UTS_MACHINE := $(ARCH) 196SRCARCH := $(ARCH) 197 198# Additional ARCH settings for x86 199ifeq ($(ARCH),i386) 200 SRCARCH := x86 201endif 202ifeq ($(ARCH),x86_64) 203 SRCARCH := x86 204endif 205 206# Additional ARCH settings for sparc 207ifeq ($(ARCH),sparc64) 208 SRCARCH := sparc 209endif 210 211# Additional ARCH settings for sh 212ifeq ($(ARCH),sh64) 213 SRCARCH := sh 214endif 215 216# Where to locate arch specific headers 217hdr-arch := $(SRCARCH) 218 219ifeq ($(ARCH),m68knommu) 220 hdr-arch := m68k 221endif 222 223KCONFIG_CONFIG ?= .config 224 225# SHELL used by kbuild 226CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 227 else if [ -x /bin/bash ]; then echo /bin/bash; \ 228 else echo sh; fi ; fi) 229 230HOSTCC = gcc 231HOSTCXX = g++ 232HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 233HOSTCXXFLAGS = -O2 234 235# Decide whether to build built-in, modular, or both. 236# Normally, just do built-in. 237 238KBUILD_MODULES := 239KBUILD_BUILTIN := 1 240 241# If we have only "make modules", don't compile built-in objects. 242# When we're building modules with modversions, we need to consider 243# the built-in objects during the descend as well, in order to 244# make sure the checksums are up to date before we record them. 245 246ifeq ($(MAKECMDGOALS),modules) 247 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 248endif 249 250# If we have "make <whatever> modules", compile modules 251# in addition to whatever we do anyway. 252# Just "make" or "make all" shall build modules as well 253 254ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 255 KBUILD_MODULES := 1 256endif 257 258ifeq ($(MAKECMDGOALS),) 259 KBUILD_MODULES := 1 260endif 261 262export KBUILD_MODULES KBUILD_BUILTIN 263export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 264 265# Beautify output 266# --------------------------------------------------------------------------- 267# 268# Normally, we echo the whole command before executing it. By making 269# that echo $($(quiet)$(cmd)), we now have the possibility to set 270# $(quiet) to choose other forms of output instead, e.g. 271# 272# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 273# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 274# 275# If $(quiet) is empty, the whole command will be printed. 276# If it is set to "quiet_", only the short version will be printed. 277# If it is set to "silent_", nothing will be printed at all, since 278# the variable $(silent_cmd_cc_o_c) doesn't exist. 279# 280# A simple variant is to prefix commands with $(Q) - that's useful 281# for commands that shall be hidden in non-verbose mode. 282# 283# $(Q)ln $@ :< 284# 285# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 286# If KBUILD_VERBOSE equals 1 then the above command is displayed. 287 288ifeq ($(KBUILD_VERBOSE),1) 289 quiet = 290 Q = 291else 292 quiet=quiet_ 293 Q = @ 294endif 295 296# If the user is running make -s (silent mode), suppress echoing of 297# commands 298 299ifneq ($(findstring s,$(MAKEFLAGS)),) 300 quiet=silent_ 301endif 302 303export quiet Q KBUILD_VERBOSE 304 305 306# Look for make include files relative to root of kernel src 307MAKEFLAGS += --include-dir=$(srctree) 308 309# We need some generic definitions (do not try to remake the file). 310$(srctree)/scripts/Kbuild.include: ; 311include $(srctree)/scripts/Kbuild.include 312 313# Make variables (CC, etc...) 314 315AS = $(CROSS_COMPILE)as 316LD = $(CROSS_COMPILE)ld 317CC = $(CROSS_COMPILE)gcc 318CPP = $(CC) -E 319AR = $(CROSS_COMPILE)ar 320NM = $(CROSS_COMPILE)nm 321STRIP = $(CROSS_COMPILE)strip 322OBJCOPY = $(CROSS_COMPILE)objcopy 323OBJDUMP = $(CROSS_COMPILE)objdump 324AWK = awk 325GENKSYMS = scripts/genksyms/genksyms 326INSTALLKERNEL := installkernel 327DEPMOD = /sbin/depmod 328KALLSYMS = scripts/kallsyms 329PERL = perl 330CHECK = sparse 331 332CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 333 -Wbitwise -Wno-return-void $(CF) 334CFLAGS_MODULE = 335AFLAGS_MODULE = 336LDFLAGS_MODULE = 337CFLAGS_KERNEL = 338AFLAGS_KERNEL = 339CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 340 341 342# Use LINUXINCLUDE when you must reference the include/ directory. 343# Needed to be compatible with the O= option 344LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 345 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 346 -include include/generated/autoconf.h 347 348KBUILD_CPPFLAGS := -D__KERNEL__ 349 350KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 351 -fno-strict-aliasing -fno-common \ 352 -Werror-implicit-function-declaration \ 353 -Wno-format-security \ 354 -fno-delete-null-pointer-checks 355KBUILD_AFLAGS_KERNEL := 356KBUILD_CFLAGS_KERNEL := 357KBUILD_AFLAGS := -D__ASSEMBLY__ 358KBUILD_AFLAGS_MODULE := -DMODULE 359KBUILD_CFLAGS_MODULE := -DMODULE 360KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 361 362# Read KERNELRELEASE from include/config/kernel.release (if it exists) 363KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 364KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 365 366export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 367export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 368export CPP AR NM STRIP OBJCOPY OBJDUMP 369export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 370export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 371 372export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 373export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 374export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 375export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 376export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 377 378# When compiling out-of-tree modules, put MODVERDIR in the module 379# tree rather than in the kernel tree. The kernel tree might 380# even be read-only. 381export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 382 383# Files to ignore in find ... statements 384 385RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 386export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 387 388# =========================================================================== 389# Rules shared between *config targets and build targets 390 391# Basic helpers built in scripts/ 392PHONY += scripts_basic 393scripts_basic: 394 $(Q)$(MAKE) $(build)=scripts/basic 395 $(Q)rm -f .tmp_quiet_recordmcount 396 397# To avoid any implicit rule to kick in, define an empty command. 398scripts/basic/%: scripts_basic ; 399 400PHONY += outputmakefile 401# outputmakefile generates a Makefile in the output directory, if using a 402# separate output directory. This allows convenient use of make in the 403# output directory. 404outputmakefile: 405ifneq ($(KBUILD_SRC),) 406 $(Q)ln -fsn $(srctree) source 407 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 408 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 409endif 410 411# To make sure we do not include .config for any of the *config targets 412# catch them early, and hand them over to scripts/kconfig/Makefile 413# It is allowed to specify more targets when calling make, including 414# mixing *config targets and build targets. 415# For example 'make oldconfig all'. 416# Detect when mixed targets is specified, and make a second invocation 417# of make so .config is not included in this case either (for *config). 418 419no-dot-config-targets := clean mrproper distclean \ 420 cscope TAGS tags help %docs check% coccicheck \ 421 include/linux/version.h headers_% \ 422 kernelversion %src-pkg 423 424config-targets := 0 425mixed-targets := 0 426dot-config := 1 427 428ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 429 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 430 dot-config := 0 431 endif 432endif 433 434ifeq ($(KBUILD_EXTMOD),) 435 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 436 config-targets := 1 437 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 438 mixed-targets := 1 439 endif 440 endif 441endif 442 443ifeq ($(mixed-targets),1) 444# =========================================================================== 445# We're called with mixed targets (*config and build targets). 446# Handle them one by one. 447 448%:: FORCE 449 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 450 451else 452ifeq ($(config-targets),1) 453# =========================================================================== 454# *config targets only - make sure prerequisites are updated, and descend 455# in scripts/kconfig to make the *config target 456 457# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 458# KBUILD_DEFCONFIG may point out an alternative default configuration 459# used for 'make defconfig' 460include $(srctree)/arch/$(SRCARCH)/Makefile 461export KBUILD_DEFCONFIG KBUILD_KCONFIG 462 463config: scripts_basic outputmakefile FORCE 464 $(Q)mkdir -p include/linux include/config 465 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 466 467%config: scripts_basic outputmakefile FORCE 468 $(Q)mkdir -p include/linux include/config 469 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 470 471else 472# =========================================================================== 473# Build targets only - this includes vmlinux, arch specific targets, clean 474# targets and others. In general all targets except *config targets. 475 476ifeq ($(KBUILD_EXTMOD),) 477# Additional helpers built in scripts/ 478# Carefully list dependencies so we do not try to build scripts twice 479# in parallel 480PHONY += scripts 481scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 482 $(Q)$(MAKE) $(build)=$(@) 483 484# Objects we will link into vmlinux / subdirs we need to visit 485init-y := init/ 486drivers-y := drivers/ sound/ firmware/ 487net-y := net/ 488libs-y := lib/ 489core-y := usr/ 490endif # KBUILD_EXTMOD 491 492ifeq ($(dot-config),1) 493# Read in config 494-include include/config/auto.conf 495 496ifeq ($(KBUILD_EXTMOD),) 497# Read in dependencies to all Kconfig* files, make sure to run 498# oldconfig if changes are detected. 499-include include/config/auto.conf.cmd 500 501# To avoid any implicit rule to kick in, define an empty command 502$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 503 504# If .config is newer than include/config/auto.conf, someone tinkered 505# with it and forgot to run make oldconfig. 506# if auto.conf.cmd is missing then we are probably in a cleaned tree so 507# we execute the config step to be sure to catch updated Kconfig files 508include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 509 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 510else 511# external modules needs include/generated/autoconf.h and include/config/auto.conf 512# but do not care if they are up-to-date. Use auto.conf to trigger the test 513PHONY += include/config/auto.conf 514 515include/config/auto.conf: 516 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 517 echo; \ 518 echo " ERROR: Kernel configuration is invalid."; \ 519 echo " include/generated/autoconf.h or $@ are missing.";\ 520 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 521 echo; \ 522 /bin/false) 523 524endif # KBUILD_EXTMOD 525 526else 527# Dummy target needed, because used as prerequisite 528include/config/auto.conf: ; 529endif # $(dot-config) 530 531# The all: target is the default when no target is given on the 532# command line. 533# This allow a user to issue only 'make' to build a kernel including modules 534# Defaults to vmlinux, but the arch makefile usually adds further targets 535all: vmlinux 536 537ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 538KBUILD_CFLAGS += -Os 539else 540KBUILD_CFLAGS += -O2 541endif 542 543include $(srctree)/arch/$(SRCARCH)/Makefile 544 545ifneq ($(CONFIG_FRAME_WARN),0) 546KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 547endif 548 549# Force gcc to behave correct even for buggy distributions 550ifndef CONFIG_CC_STACKPROTECTOR 551KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 552endif 553 554ifdef CONFIG_FRAME_POINTER 555KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 556else 557# Some targets (ARM with Thumb2, for example), can't be built with frame 558# pointers. For those, we don't have FUNCTION_TRACER automatically 559# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 560# incompatible with -fomit-frame-pointer with current GCC, so we don't use 561# -fomit-frame-pointer with FUNCTION_TRACER. 562ifndef CONFIG_FUNCTION_TRACER 563KBUILD_CFLAGS += -fomit-frame-pointer 564endif 565endif 566 567ifdef CONFIG_DEBUG_INFO 568KBUILD_CFLAGS += -g 569KBUILD_AFLAGS += -gdwarf-2 570endif 571 572ifdef CONFIG_DEBUG_INFO_REDUCED 573KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 574endif 575 576ifdef CONFIG_FUNCTION_TRACER 577KBUILD_CFLAGS += -pg 578ifdef CONFIG_DYNAMIC_FTRACE 579 ifdef CONFIG_HAVE_C_RECORDMCOUNT 580 BUILD_C_RECORDMCOUNT := y 581 export BUILD_C_RECORDMCOUNT 582 endif 583endif 584endif 585 586# We trigger additional mismatches with less inlining 587ifdef CONFIG_DEBUG_SECTION_MISMATCH 588KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 589endif 590 591# arch Makefile may override CC so keep this after arch Makefile is included 592NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 593CHECKFLAGS += $(NOSTDINC_FLAGS) 594 595# warn about C99 declaration after statement 596KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 597 598# disable pointer signed / unsigned warnings in gcc 4.0 599KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 600 601# disable invalid "can't wrap" optimizations for signed / pointers 602KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 603 604# conserve stack if available 605KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 606 607# check for 'asm goto' 608ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 609 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 610endif 611 612# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 613# But warn user when we do so 614warn-assign = \ 615$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 616 617ifneq ($(KCPPFLAGS),) 618 $(call warn-assign,CPPFLAGS) 619 KBUILD_CPPFLAGS += $(KCPPFLAGS) 620endif 621ifneq ($(KAFLAGS),) 622 $(call warn-assign,AFLAGS) 623 KBUILD_AFLAGS += $(KAFLAGS) 624endif 625ifneq ($(KCFLAGS),) 626 $(call warn-assign,CFLAGS) 627 KBUILD_CFLAGS += $(KCFLAGS) 628endif 629 630# Use --build-id when available. 631LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 632 $(call cc-ldoption, -Wl$(comma)--build-id,)) 633KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 634LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 635 636ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 637LDFLAGS_vmlinux += $(call ld-option, -X,) 638endif 639 640# Default kernel image to build when no specific target is given. 641# KBUILD_IMAGE may be overruled on the command line or 642# set in the environment 643# Also any assignments in arch/$(ARCH)/Makefile take precedence over 644# this default value 645export KBUILD_IMAGE ?= vmlinux 646 647# 648# INSTALL_PATH specifies where to place the updated kernel and system map 649# images. Default is /boot, but you can set it to other values 650export INSTALL_PATH ?= /boot 651 652# 653# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 654# relocations required by build roots. This is not defined in the 655# makefile but the argument can be passed to make if needed. 656# 657 658MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 659export MODLIB 660 661# 662# INSTALL_MOD_STRIP, if defined, will cause modules to be 663# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 664# the default option --strip-debug will be used. Otherwise, 665# INSTALL_MOD_STRIP will used as the options to the strip command. 666 667ifdef INSTALL_MOD_STRIP 668ifeq ($(INSTALL_MOD_STRIP),1) 669mod_strip_cmd = $(STRIP) --strip-debug 670else 671mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 672endif # INSTALL_MOD_STRIP=1 673else 674mod_strip_cmd = true 675endif # INSTALL_MOD_STRIP 676export mod_strip_cmd 677 678 679ifeq ($(KBUILD_EXTMOD),) 680core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 681 682vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 683 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 684 $(net-y) $(net-m) $(libs-y) $(libs-m))) 685 686vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 687 $(init-n) $(init-) \ 688 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 689 $(net-n) $(net-) $(libs-n) $(libs-)))) 690 691init-y := $(patsubst %/, %/built-in.o, $(init-y)) 692core-y := $(patsubst %/, %/built-in.o, $(core-y)) 693drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 694net-y := $(patsubst %/, %/built-in.o, $(net-y)) 695libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 696libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 697libs-y := $(libs-y1) $(libs-y2) 698 699# Build vmlinux 700# --------------------------------------------------------------------------- 701# vmlinux is built from the objects selected by $(vmlinux-init) and 702# $(vmlinux-main). Most are built-in.o files from top-level directories 703# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 704# Ordering when linking is important, and $(vmlinux-init) must be first. 705# 706# vmlinux 707# ^ 708# | 709# +-< $(vmlinux-init) 710# | +--< init/version.o + more 711# | 712# +--< $(vmlinux-main) 713# | +--< driver/built-in.o mm/built-in.o + more 714# | 715# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 716# 717# vmlinux version (uname -v) cannot be updated during normal 718# descending-into-subdirs phase since we do not yet know if we need to 719# update vmlinux. 720# Therefore this step is delayed until just before final link of vmlinux - 721# except in the kallsyms case where it is done just before adding the 722# symbols to the kernel. 723# 724# System.map is generated to document addresses of all kernel symbols 725 726vmlinux-init := $(head-y) $(init-y) 727vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 728vmlinux-all := $(vmlinux-init) $(vmlinux-main) 729vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 730export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 731 732# Rule to link vmlinux - also used during CONFIG_KALLSYMS 733# May be overridden by arch/$(ARCH)/Makefile 734quiet_cmd_vmlinux__ ?= LD $@ 735 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 736 -T $(vmlinux-lds) $(vmlinux-init) \ 737 --start-group $(vmlinux-main) --end-group \ 738 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 739 740# Generate new vmlinux version 741quiet_cmd_vmlinux_version = GEN .version 742 cmd_vmlinux_version = set -e; \ 743 if [ ! -r .version ]; then \ 744 rm -f .version; \ 745 echo 1 >.version; \ 746 else \ 747 mv .version .old_version; \ 748 expr 0$$(cat .old_version) + 1 >.version; \ 749 fi; \ 750 $(MAKE) $(build)=init 751 752# Generate System.map 753quiet_cmd_sysmap = SYSMAP 754 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 755 756# Link of vmlinux 757# If CONFIG_KALLSYMS is set .version is already updated 758# Generate System.map and verify that the content is consistent 759# Use + in front of the vmlinux_version rule to silent warning with make -j2 760# First command is ':' to allow us to use + in front of the rule 761define rule_vmlinux__ 762 : 763 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 764 765 $(call cmd,vmlinux__) 766 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 767 768 $(Q)$(if $($(quiet)cmd_sysmap), \ 769 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 770 $(cmd_sysmap) $@ System.map; \ 771 if [ $$? -ne 0 ]; then \ 772 rm -f $@; \ 773 /bin/false; \ 774 fi; 775 $(verify_kallsyms) 776endef 777 778 779ifdef CONFIG_KALLSYMS 780# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 781# It's a three stage process: 782# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 783# empty 784# Running kallsyms on that gives us .tmp_kallsyms1.o with 785# the right size - vmlinux version (uname -v) is updated during this step 786# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 787# but due to the added section, some addresses have shifted. 788# From here, we generate a correct .tmp_kallsyms2.o 789# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 790# o Verify that the System.map from vmlinux matches the map from 791# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 792# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 793# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 794# temporary bypass to allow the kernel to be built while the 795# maintainers work out what went wrong with kallsyms. 796 797ifdef CONFIG_KALLSYMS_EXTRA_PASS 798last_kallsyms := 3 799else 800last_kallsyms := 2 801endif 802 803kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 804 805define verify_kallsyms 806 $(Q)$(if $($(quiet)cmd_sysmap), \ 807 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 808 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 809 $(Q)cmp -s System.map .tmp_System.map || \ 810 (echo Inconsistent kallsyms data; \ 811 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 812 rm .tmp_kallsyms* ; /bin/false ) 813endef 814 815# Update vmlinux version before link 816# Use + in front of this rule to silent warning about make -j1 817# First command is ':' to allow us to use + in front of this rule 818cmd_ksym_ld = $(cmd_vmlinux__) 819define rule_ksym_ld 820 : 821 +$(call cmd,vmlinux_version) 822 $(call cmd,vmlinux__) 823 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 824endef 825 826# Generate .S file with all kernel symbols 827quiet_cmd_kallsyms = KSYM $@ 828 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 829 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 830 831.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 832 $(call if_changed_dep,as_o_S) 833 834.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 835 $(call cmd,kallsyms) 836 837# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 838.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 839 $(call if_changed_rule,ksym_ld) 840 841.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 842 $(call if_changed,vmlinux__) 843 844.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 845 $(call if_changed,vmlinux__) 846 847# Needs to visit scripts/ before $(KALLSYMS) can be used. 848$(KALLSYMS): scripts ; 849 850# Generate some data for debugging strange kallsyms problems 851debug_kallsyms: .tmp_map$(last_kallsyms) 852 853.tmp_map%: .tmp_vmlinux% FORCE 854 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 855 856.tmp_map3: .tmp_map2 857 858.tmp_map2: .tmp_map1 859 860endif # ifdef CONFIG_KALLSYMS 861 862# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 863# relevant sections renamed as per the linker script. 864quiet_cmd_vmlinux-modpost = LD $@ 865 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 866 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 867 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 868define rule_vmlinux-modpost 869 : 870 +$(call cmd,vmlinux-modpost) 871 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 872 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 873endef 874 875# vmlinux image - including updated kernel symbols 876vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 877ifdef CONFIG_HEADERS_CHECK 878 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 879endif 880ifdef CONFIG_SAMPLES 881 $(Q)$(MAKE) $(build)=samples 882endif 883ifdef CONFIG_BUILD_DOCSRC 884 $(Q)$(MAKE) $(build)=Documentation 885endif 886 $(call vmlinux-modpost) 887 $(call if_changed_rule,vmlinux__) 888 $(Q)rm -f .old_version 889 890# build vmlinux.o first to catch section mismatch errors early 891ifdef CONFIG_KALLSYMS 892.tmp_vmlinux1: vmlinux.o 893endif 894 895modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 896vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 897 $(call if_changed_rule,vmlinux-modpost) 898 899# The actual objects are generated when descending, 900# make sure no implicit rule kicks in 901$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 902 903# Handle descending into subdirectories listed in $(vmlinux-dirs) 904# Preset locale variables to speed up the build process. Limit locale 905# tweaks to this spot to avoid wrong language settings when running 906# make menuconfig etc. 907# Error messages still appears in the original language 908 909PHONY += $(vmlinux-dirs) 910$(vmlinux-dirs): prepare scripts 911 $(Q)$(MAKE) $(build)=$@ 912 913# Store (new) KERNELRELASE string in include/config/kernel.release 914include/config/kernel.release: include/config/auto.conf FORCE 915 $(Q)rm -f $@ 916 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 917 918 919# Things we need to do before we recursively start building the kernel 920# or the modules are listed in "prepare". 921# A multi level approach is used. prepareN is processed before prepareN-1. 922# archprepare is used in arch Makefiles and when processed asm symlink, 923# version.h and scripts_basic is processed / created. 924 925# Listed in dependency order 926PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 927 928# prepare3 is used to check if we are building in a separate output directory, 929# and if so do: 930# 1) Check that make has not been executed in the kernel src $(srctree) 931prepare3: include/config/kernel.release 932ifneq ($(KBUILD_SRC),) 933 @$(kecho) ' Using $(srctree) as source for kernel' 934 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 935 echo " $(srctree) is not clean, please run 'make mrproper'";\ 936 echo " in the '$(srctree)' directory.";\ 937 /bin/false; \ 938 fi; 939endif 940 941# prepare2 creates a makefile if using a separate output directory 942prepare2: prepare3 outputmakefile 943 944prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 945 include/config/auto.conf 946 $(cmd_crmodverdir) 947 948archprepare: prepare1 scripts_basic 949 950prepare0: archprepare FORCE 951 $(Q)$(MAKE) $(build)=. 952 $(Q)$(MAKE) $(build)=. missing-syscalls 953 954# All the preparing.. 955prepare: prepare0 956 957# Generate some files 958# --------------------------------------------------------------------------- 959 960# KERNELRELEASE can change from a few different places, meaning version.h 961# needs to be updated, so this check is forced on all builds 962 963uts_len := 64 964define filechk_utsrelease.h 965 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 966 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 967 exit 1; \ 968 fi; \ 969 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 970endef 971 972define filechk_version.h 973 (echo \#define LINUX_VERSION_CODE $(shell \ 974 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 975 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 976endef 977 978include/linux/version.h: $(srctree)/Makefile FORCE 979 $(call filechk,version.h) 980 981include/generated/utsrelease.h: include/config/kernel.release FORCE 982 $(call filechk,utsrelease.h) 983 984PHONY += headerdep 985headerdep: 986 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 987 988# --------------------------------------------------------------------------- 989 990PHONY += depend dep 991depend dep: 992 @echo '*** Warning: make $@ is unnecessary now.' 993 994# --------------------------------------------------------------------------- 995# Firmware install 996INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 997export INSTALL_FW_PATH 998 999PHONY += firmware_install 1000firmware_install: FORCE 1001 @mkdir -p $(objtree)/firmware 1002 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1003 1004# --------------------------------------------------------------------------- 1005# Kernel headers 1006 1007#Default location for installed headers 1008export INSTALL_HDR_PATH = $(objtree)/usr 1009 1010hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1011 1012# If we do an all arch process set dst to asm-$(hdr-arch) 1013hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1014 1015PHONY += __headers 1016__headers: include/linux/version.h scripts_basic FORCE 1017 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1018 1019PHONY += headers_install_all 1020headers_install_all: 1021 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1022 1023PHONY += headers_install 1024headers_install: __headers 1025 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1026 $(error Headers not exportable for the $(SRCARCH) architecture)) 1027 $(Q)$(MAKE) $(hdr-inst)=include 1028 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1029 1030PHONY += headers_check_all 1031headers_check_all: headers_install_all 1032 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1033 1034PHONY += headers_check 1035headers_check: headers_install 1036 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1037 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1038 1039# --------------------------------------------------------------------------- 1040# Modules 1041 1042ifdef CONFIG_MODULES 1043 1044# By default, build modules as well 1045 1046all: modules 1047 1048# Build modules 1049# 1050# A module can be listed more than once in obj-m resulting in 1051# duplicate lines in modules.order files. Those are removed 1052# using awk while concatenating to the final file. 1053 1054PHONY += modules 1055modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1056 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1057 @$(kecho) ' Building modules, stage 2.'; 1058 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1059 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1060 1061modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1062 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1063 1064%/modules.builtin: include/config/auto.conf 1065 $(Q)$(MAKE) $(modbuiltin)=$* 1066 1067 1068# Target to prepare building external modules 1069PHONY += modules_prepare 1070modules_prepare: prepare scripts 1071 1072# Target to install modules 1073PHONY += modules_install 1074modules_install: _modinst_ _modinst_post 1075 1076PHONY += _modinst_ 1077_modinst_: 1078 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1079 echo "Warning: you may need to install module-init-tools"; \ 1080 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1081 sleep 1; \ 1082 fi 1083 @rm -rf $(MODLIB)/kernel 1084 @rm -f $(MODLIB)/source 1085 @mkdir -p $(MODLIB)/kernel 1086 @ln -s $(srctree) $(MODLIB)/source 1087 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1088 rm -f $(MODLIB)/build ; \ 1089 ln -s $(objtree) $(MODLIB)/build ; \ 1090 fi 1091 @cp -f $(objtree)/modules.order $(MODLIB)/ 1092 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1093 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1094 1095# This depmod is only for convenience to give the initial 1096# boot a modules.dep even before / is mounted read-write. However the 1097# boot script depmod is the master version. 1098PHONY += _modinst_post 1099_modinst_post: _modinst_ 1100 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1101 $(call cmd,depmod) 1102 1103else # CONFIG_MODULES 1104 1105# Modules not configured 1106# --------------------------------------------------------------------------- 1107 1108modules modules_install: FORCE 1109 @echo 1110 @echo "The present kernel configuration has modules disabled." 1111 @echo "Type 'make config' and enable loadable module support." 1112 @echo "Then build a kernel with module support enabled." 1113 @echo 1114 @exit 1 1115 1116endif # CONFIG_MODULES 1117 1118### 1119# Cleaning is done on three levels. 1120# make clean Delete most generated files 1121# Leave enough to build external modules 1122# make mrproper Delete the current configuration, and all generated files 1123# make distclean Remove editor backup files, patch leftover files and the like 1124 1125# Directories & files removed with 'make clean' 1126CLEAN_DIRS += $(MODVERDIR) 1127CLEAN_FILES += vmlinux System.map \ 1128 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1129 1130# Directories & files removed with 'make mrproper' 1131MRPROPER_DIRS += include/config usr/include include/generated 1132MRPROPER_FILES += .config .config.old .version .old_version \ 1133 include/linux/version.h \ 1134 Module.symvers tags TAGS cscope* 1135 1136# clean - Delete most, but leave enough to build external modules 1137# 1138clean: rm-dirs := $(CLEAN_DIRS) 1139clean: rm-files := $(CLEAN_FILES) 1140clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1141 1142PHONY += $(clean-dirs) clean archclean 1143$(clean-dirs): 1144 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1145 1146clean: archclean $(clean-dirs) 1147 $(call cmd,rmdirs) 1148 $(call cmd,rmfiles) 1149 @find . $(RCS_FIND_IGNORE) \ 1150 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1151 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1152 -o -name '*.symtypes' -o -name 'modules.order' \ 1153 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1154 -o -name '*.gcno' \) -type f -print | xargs rm -f 1155 1156# mrproper - Delete all generated files, including .config 1157# 1158mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1159mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1160mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1161 1162PHONY += $(mrproper-dirs) mrproper archmrproper 1163$(mrproper-dirs): 1164 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1165 1166mrproper: clean archmrproper $(mrproper-dirs) 1167 $(call cmd,rmdirs) 1168 $(call cmd,rmfiles) 1169 1170# distclean 1171# 1172PHONY += distclean 1173 1174distclean: mrproper 1175 @find $(srctree) $(RCS_FIND_IGNORE) \ 1176 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1177 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1178 -o -name '.*.rej' -o -size 0 \ 1179 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1180 -type f -print | xargs rm -f 1181 1182 1183# Packaging of the kernel to various formats 1184# --------------------------------------------------------------------------- 1185# rpm target kept for backward compatibility 1186package-dir := $(srctree)/scripts/package 1187 1188%src-pkg: FORCE 1189 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1190%pkg: include/config/kernel.release FORCE 1191 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1192rpm: include/config/kernel.release FORCE 1193 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1194 1195 1196# Brief documentation of the typical targets used 1197# --------------------------------------------------------------------------- 1198 1199boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1200boards := $(notdir $(boards)) 1201board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1202board-dirs := $(sort $(notdir $(board-dirs:/=))) 1203 1204help: 1205 @echo 'Cleaning targets:' 1206 @echo ' clean - Remove most generated files but keep the config and' 1207 @echo ' enough build support to build external modules' 1208 @echo ' mrproper - Remove all generated files + config + various backup files' 1209 @echo ' distclean - mrproper + remove editor backup and patch files' 1210 @echo '' 1211 @echo 'Configuration targets:' 1212 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1213 @echo '' 1214 @echo 'Other generic targets:' 1215 @echo ' all - Build all targets marked with [*]' 1216 @echo '* vmlinux - Build the bare kernel' 1217 @echo '* modules - Build all modules' 1218 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1219 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1220 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1221 @echo ' dir/ - Build all files in dir and below' 1222 @echo ' dir/file.[oisS] - Build specified target only' 1223 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1224 @echo ' (requires a recent binutils and recent build (System.map))' 1225 @echo ' dir/file.ko - Build module including final link' 1226 @echo ' modules_prepare - Set up for building external modules' 1227 @echo ' tags/TAGS - Generate tags file for editors' 1228 @echo ' cscope - Generate cscope index' 1229 @echo ' kernelrelease - Output the release version string' 1230 @echo ' kernelversion - Output the version stored in Makefile' 1231 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1232 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1233 echo '' 1234 @echo 'Static analysers' 1235 @echo ' checkstack - Generate a list of stack hogs' 1236 @echo ' namespacecheck - Name space analysis on compiled kernel' 1237 @echo ' versioncheck - Sanity check on version.h usage' 1238 @echo ' includecheck - Check for duplicate included header files' 1239 @echo ' export_report - List the usages of all exported symbols' 1240 @echo ' headers_check - Sanity check on exported headers' 1241 @echo ' headerdep - Detect inclusion cycles in headers' 1242 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1243 @echo '' 1244 @echo 'Kernel packaging:' 1245 @$(MAKE) $(build)=$(package-dir) help 1246 @echo '' 1247 @echo 'Documentation targets:' 1248 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1249 @echo '' 1250 @echo 'Architecture specific targets ($(SRCARCH)):' 1251 @$(if $(archhelp),$(archhelp),\ 1252 echo ' No architecture specific help defined for $(SRCARCH)') 1253 @echo '' 1254 @$(if $(boards), \ 1255 $(foreach b, $(boards), \ 1256 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1257 echo '') 1258 @$(if $(board-dirs), \ 1259 $(foreach b, $(board-dirs), \ 1260 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1261 printf " %-16s - Show all of the above\\n" help-boards; \ 1262 echo '') 1263 1264 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1265 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1266 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1267 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1268 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1269 @echo '' 1270 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1271 @echo 'For further info see the ./README file' 1272 1273 1274help-board-dirs := $(addprefix help-,$(board-dirs)) 1275 1276help-boards: $(help-board-dirs) 1277 1278boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1279 1280$(help-board-dirs): help-%: 1281 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1282 @$(if $(boards-per-dir), \ 1283 $(foreach b, $(boards-per-dir), \ 1284 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1285 echo '') 1286 1287 1288# Documentation targets 1289# --------------------------------------------------------------------------- 1290%docs: scripts_basic FORCE 1291 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1292 1293else # KBUILD_EXTMOD 1294 1295### 1296# External module support. 1297# When building external modules the kernel used as basis is considered 1298# read-only, and no consistency checks are made and the make 1299# system is not used on the basis kernel. If updates are required 1300# in the basis kernel ordinary make commands (without M=...) must 1301# be used. 1302# 1303# The following are the only valid targets when building external 1304# modules. 1305# make M=dir clean Delete all automatically generated files 1306# make M=dir modules Make all modules in specified dir 1307# make M=dir Same as 'make M=dir modules' 1308# make M=dir modules_install 1309# Install the modules built in the module directory 1310# Assumes install directory is already created 1311 1312# We are always building modules 1313KBUILD_MODULES := 1 1314PHONY += crmodverdir 1315crmodverdir: 1316 $(cmd_crmodverdir) 1317 1318PHONY += $(objtree)/Module.symvers 1319$(objtree)/Module.symvers: 1320 @test -e $(objtree)/Module.symvers || ( \ 1321 echo; \ 1322 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1323 echo " is missing; modules will have no dependencies and modversions."; \ 1324 echo ) 1325 1326module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1327PHONY += $(module-dirs) modules 1328$(module-dirs): crmodverdir $(objtree)/Module.symvers 1329 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1330 1331modules: $(module-dirs) 1332 @$(kecho) ' Building modules, stage 2.'; 1333 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1334 1335PHONY += modules_install 1336modules_install: _emodinst_ _emodinst_post 1337 1338install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1339PHONY += _emodinst_ 1340_emodinst_: 1341 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1342 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1343 1344PHONY += _emodinst_post 1345_emodinst_post: _emodinst_ 1346 $(call cmd,depmod) 1347 1348clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1349 1350PHONY += $(clean-dirs) clean 1351$(clean-dirs): 1352 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1353 1354clean: rm-dirs := $(MODVERDIR) 1355clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1356 $(KBUILD_EXTMOD)/modules.order \ 1357 $(KBUILD_EXTMOD)/modules.builtin 1358clean: $(clean-dirs) 1359 $(call cmd,rmdirs) 1360 $(call cmd,rmfiles) 1361 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1362 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1363 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1364 -o -name '*.gcno' \) -type f -print | xargs rm -f 1365 1366help: 1367 @echo ' Building external modules.' 1368 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1369 @echo '' 1370 @echo ' modules - default target, build the module(s)' 1371 @echo ' modules_install - install the module' 1372 @echo ' clean - remove generated files in module directory only' 1373 @echo '' 1374 1375# Dummies... 1376PHONY += prepare scripts 1377prepare: ; 1378scripts: ; 1379endif # KBUILD_EXTMOD 1380 1381# Generate tags for editors 1382# --------------------------------------------------------------------------- 1383quiet_cmd_tags = GEN $@ 1384 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1385 1386tags TAGS cscope: FORCE 1387 $(call cmd,tags) 1388 1389# Scripts to check various things for consistency 1390# --------------------------------------------------------------------------- 1391 1392includecheck: 1393 find * $(RCS_FIND_IGNORE) \ 1394 -name '*.[hcS]' -type f -print | sort \ 1395 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1396 1397versioncheck: 1398 find * $(RCS_FIND_IGNORE) \ 1399 -name '*.[hcS]' -type f -print | sort \ 1400 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1401 1402coccicheck: 1403 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1404 1405namespacecheck: 1406 $(PERL) $(srctree)/scripts/namespace.pl 1407 1408export_report: 1409 $(PERL) $(srctree)/scripts/export_report.pl 1410 1411endif #ifeq ($(config-targets),1) 1412endif #ifeq ($(mixed-targets),1) 1413 1414PHONY += checkstack kernelrelease kernelversion 1415 1416# UML needs a little special treatment here. It wants to use the host 1417# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1418# else wants $(ARCH), including people doing cross-builds, which means 1419# that $(SUBARCH) doesn't work here. 1420ifeq ($(ARCH), um) 1421CHECKSTACK_ARCH := $(SUBARCH) 1422else 1423CHECKSTACK_ARCH := $(ARCH) 1424endif 1425checkstack: 1426 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1427 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1428 1429kernelrelease: 1430 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1431 1432kernelversion: 1433 @echo $(KERNELVERSION) 1434 1435# Single targets 1436# --------------------------------------------------------------------------- 1437# Single targets are compatible with: 1438# - build with mixed source and output 1439# - build with separate output dir 'make O=...' 1440# - external modules 1441# 1442# target-dir => where to store outputfile 1443# build-dir => directory in kernel source tree to use 1444 1445ifeq ($(KBUILD_EXTMOD),) 1446 build-dir = $(patsubst %/,%,$(dir $@)) 1447 target-dir = $(dir $@) 1448else 1449 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1450 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1451 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1452endif 1453 1454%.s: %.c prepare scripts FORCE 1455 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1456%.i: %.c prepare scripts FORCE 1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1458%.o: %.c prepare scripts FORCE 1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1460%.lst: %.c prepare scripts FORCE 1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1462%.s: %.S prepare scripts FORCE 1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1464%.o: %.S prepare scripts FORCE 1465 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1466%.symtypes: %.c prepare scripts FORCE 1467 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1468 1469# Modules 1470/: prepare scripts FORCE 1471 $(cmd_crmodverdir) 1472 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1473 $(build)=$(build-dir) 1474%/: prepare scripts FORCE 1475 $(cmd_crmodverdir) 1476 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1477 $(build)=$(build-dir) 1478%.ko: prepare scripts FORCE 1479 $(cmd_crmodverdir) 1480 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1481 $(build)=$(build-dir) $(@:.ko=.o) 1482 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1483 1484# FIXME Should go into a make.lib or something 1485# =========================================================================== 1486 1487quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1488 cmd_rmdirs = rm -rf $(rm-dirs) 1489 1490quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1491 cmd_rmfiles = rm -f $(rm-files) 1492 1493# Run depmod only if we have System.map and depmod is executable 1494quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1495 cmd_depmod = \ 1496 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1497 $(DEPMOD) -ae -F System.map \ 1498 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1499 $(KERNELRELEASE); \ 1500 fi 1501 1502# Create temporary dir for module support files 1503# clean it up only when building all modules 1504cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1505 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1506 1507a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1508 $(KBUILD_AFLAGS_KERNEL) \ 1509 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1510 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1511 1512quiet_cmd_as_o_S = AS $@ 1513cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1514 1515# read all saved command lines 1516 1517targets := $(wildcard $(sort $(targets))) 1518cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1519 1520ifneq ($(cmd_files),) 1521 $(cmd_files): ; # Do not try to update included dependency files 1522 include $(cmd_files) 1523endif 1524 1525# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1526# Usage: 1527# $(Q)$(MAKE) $(clean)=dir 1528clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1529 1530endif # skip-makefile 1531 1532PHONY += FORCE 1533FORCE: 1534 1535# Declare the contents of the .PHONY variable as phony. We keep that 1536# information in a variable so we can use it in if_changed and friends. 1537.PHONY: $(PHONY) 1538