1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 37 4EXTRAVERSION = .1 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),sparc32) 208 SRCARCH := sparc 209endif 210ifeq ($(ARCH),sparc64) 211 SRCARCH := sparc 212endif 213 214# Additional ARCH settings for sh 215ifeq ($(ARCH),sh64) 216 SRCARCH := sh 217endif 218 219# Where to locate arch specific headers 220hdr-arch := $(SRCARCH) 221 222ifeq ($(ARCH),m68knommu) 223 hdr-arch := m68k 224endif 225 226KCONFIG_CONFIG ?= .config 227 228# SHELL used by kbuild 229CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 230 else if [ -x /bin/bash ]; then echo /bin/bash; \ 231 else echo sh; fi ; fi) 232 233HOSTCC = gcc 234HOSTCXX = g++ 235HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 236HOSTCXXFLAGS = -O2 237 238# Decide whether to build built-in, modular, or both. 239# Normally, just do built-in. 240 241KBUILD_MODULES := 242KBUILD_BUILTIN := 1 243 244# If we have only "make modules", don't compile built-in objects. 245# When we're building modules with modversions, we need to consider 246# the built-in objects during the descend as well, in order to 247# make sure the checksums are up to date before we record them. 248 249ifeq ($(MAKECMDGOALS),modules) 250 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 251endif 252 253# If we have "make <whatever> modules", compile modules 254# in addition to whatever we do anyway. 255# Just "make" or "make all" shall build modules as well 256 257ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 258 KBUILD_MODULES := 1 259endif 260 261ifeq ($(MAKECMDGOALS),) 262 KBUILD_MODULES := 1 263endif 264 265export KBUILD_MODULES KBUILD_BUILTIN 266export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 267 268# Beautify output 269# --------------------------------------------------------------------------- 270# 271# Normally, we echo the whole command before executing it. By making 272# that echo $($(quiet)$(cmd)), we now have the possibility to set 273# $(quiet) to choose other forms of output instead, e.g. 274# 275# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 276# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 277# 278# If $(quiet) is empty, the whole command will be printed. 279# If it is set to "quiet_", only the short version will be printed. 280# If it is set to "silent_", nothing will be printed at all, since 281# the variable $(silent_cmd_cc_o_c) doesn't exist. 282# 283# A simple variant is to prefix commands with $(Q) - that's useful 284# for commands that shall be hidden in non-verbose mode. 285# 286# $(Q)ln $@ :< 287# 288# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 289# If KBUILD_VERBOSE equals 1 then the above command is displayed. 290 291ifeq ($(KBUILD_VERBOSE),1) 292 quiet = 293 Q = 294else 295 quiet=quiet_ 296 Q = @ 297endif 298 299# If the user is running make -s (silent mode), suppress echoing of 300# commands 301 302ifneq ($(findstring s,$(MAKEFLAGS)),) 303 quiet=silent_ 304endif 305 306export quiet Q KBUILD_VERBOSE 307 308 309# Look for make include files relative to root of kernel src 310MAKEFLAGS += --include-dir=$(srctree) 311 312# We need some generic definitions (do not try to remake the file). 313$(srctree)/scripts/Kbuild.include: ; 314include $(srctree)/scripts/Kbuild.include 315 316# Make variables (CC, etc...) 317 318AS = $(CROSS_COMPILE)as 319LD = $(CROSS_COMPILE)ld 320CC = $(CROSS_COMPILE)gcc 321CPP = $(CC) -E 322AR = $(CROSS_COMPILE)ar 323NM = $(CROSS_COMPILE)nm 324STRIP = $(CROSS_COMPILE)strip 325OBJCOPY = $(CROSS_COMPILE)objcopy 326OBJDUMP = $(CROSS_COMPILE)objdump 327AWK = awk 328GENKSYMS = scripts/genksyms/genksyms 329INSTALLKERNEL := installkernel 330DEPMOD = /sbin/depmod 331KALLSYMS = scripts/kallsyms 332PERL = perl 333CHECK = sparse 334 335CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 336 -Wbitwise -Wno-return-void $(CF) 337CFLAGS_MODULE = 338AFLAGS_MODULE = 339LDFLAGS_MODULE = 340CFLAGS_KERNEL = 341AFLAGS_KERNEL = 342CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 343 344 345# Use LINUXINCLUDE when you must reference the include/ directory. 346# Needed to be compatible with the O= option 347LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 348 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 349 -include include/generated/autoconf.h 350 351KBUILD_CPPFLAGS := -D__KERNEL__ 352 353KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 354 -fno-strict-aliasing -fno-common \ 355 -Werror-implicit-function-declaration \ 356 -Wno-format-security \ 357 -fno-delete-null-pointer-checks 358KBUILD_AFLAGS_KERNEL := 359KBUILD_CFLAGS_KERNEL := 360KBUILD_AFLAGS := -D__ASSEMBLY__ 361KBUILD_AFLAGS_MODULE := -DMODULE 362KBUILD_CFLAGS_MODULE := -DMODULE 363KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 364 365# Read KERNELRELEASE from include/config/kernel.release (if it exists) 366KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 367KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 368 369export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 370export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 371export CPP AR NM STRIP OBJCOPY OBJDUMP 372export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 373export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 374 375export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 376export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 377export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 378export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 379export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 380 381# When compiling out-of-tree modules, put MODVERDIR in the module 382# tree rather than in the kernel tree. The kernel tree might 383# even be read-only. 384export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 385 386# Files to ignore in find ... statements 387 388RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 389export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 390 391# =========================================================================== 392# Rules shared between *config targets and build targets 393 394# Basic helpers built in scripts/ 395PHONY += scripts_basic 396scripts_basic: 397 $(Q)$(MAKE) $(build)=scripts/basic 398 $(Q)rm -f .tmp_quiet_recordmcount 399 400# To avoid any implicit rule to kick in, define an empty command. 401scripts/basic/%: scripts_basic ; 402 403PHONY += outputmakefile 404# outputmakefile generates a Makefile in the output directory, if using a 405# separate output directory. This allows convenient use of make in the 406# output directory. 407outputmakefile: 408ifneq ($(KBUILD_SRC),) 409 $(Q)ln -fsn $(srctree) source 410 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 411 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 412endif 413 414# To make sure we do not include .config for any of the *config targets 415# catch them early, and hand them over to scripts/kconfig/Makefile 416# It is allowed to specify more targets when calling make, including 417# mixing *config targets and build targets. 418# For example 'make oldconfig all'. 419# Detect when mixed targets is specified, and make a second invocation 420# of make so .config is not included in this case either (for *config). 421 422no-dot-config-targets := clean mrproper distclean \ 423 cscope TAGS tags help %docs check% coccicheck \ 424 include/linux/version.h headers_% \ 425 kernelversion %src-pkg 426 427config-targets := 0 428mixed-targets := 0 429dot-config := 1 430 431ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 432 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 433 dot-config := 0 434 endif 435endif 436 437ifeq ($(KBUILD_EXTMOD),) 438 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 439 config-targets := 1 440 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 441 mixed-targets := 1 442 endif 443 endif 444endif 445 446ifeq ($(mixed-targets),1) 447# =========================================================================== 448# We're called with mixed targets (*config and build targets). 449# Handle them one by one. 450 451%:: FORCE 452 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 453 454else 455ifeq ($(config-targets),1) 456# =========================================================================== 457# *config targets only - make sure prerequisites are updated, and descend 458# in scripts/kconfig to make the *config target 459 460# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 461# KBUILD_DEFCONFIG may point out an alternative default configuration 462# used for 'make defconfig' 463include $(srctree)/arch/$(SRCARCH)/Makefile 464export KBUILD_DEFCONFIG KBUILD_KCONFIG 465 466config: scripts_basic outputmakefile FORCE 467 $(Q)mkdir -p include/linux include/config 468 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 469 470%config: scripts_basic outputmakefile FORCE 471 $(Q)mkdir -p include/linux include/config 472 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 473 474else 475# =========================================================================== 476# Build targets only - this includes vmlinux, arch specific targets, clean 477# targets and others. In general all targets except *config targets. 478 479ifeq ($(KBUILD_EXTMOD),) 480# Additional helpers built in scripts/ 481# Carefully list dependencies so we do not try to build scripts twice 482# in parallel 483PHONY += scripts 484scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 485 $(Q)$(MAKE) $(build)=$(@) 486 487# Objects we will link into vmlinux / subdirs we need to visit 488init-y := init/ 489drivers-y := drivers/ sound/ firmware/ 490net-y := net/ 491libs-y := lib/ 492core-y := usr/ 493endif # KBUILD_EXTMOD 494 495ifeq ($(dot-config),1) 496# Read in config 497-include include/config/auto.conf 498 499ifeq ($(KBUILD_EXTMOD),) 500# Read in dependencies to all Kconfig* files, make sure to run 501# oldconfig if changes are detected. 502-include include/config/auto.conf.cmd 503 504# To avoid any implicit rule to kick in, define an empty command 505$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 506 507# If .config is newer than include/config/auto.conf, someone tinkered 508# with it and forgot to run make oldconfig. 509# if auto.conf.cmd is missing then we are probably in a cleaned tree so 510# we execute the config step to be sure to catch updated Kconfig files 511include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 512 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 513else 514# external modules needs include/generated/autoconf.h and include/config/auto.conf 515# but do not care if they are up-to-date. Use auto.conf to trigger the test 516PHONY += include/config/auto.conf 517 518include/config/auto.conf: 519 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 520 echo; \ 521 echo " ERROR: Kernel configuration is invalid."; \ 522 echo " include/generated/autoconf.h or $@ are missing.";\ 523 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 524 echo; \ 525 /bin/false) 526 527endif # KBUILD_EXTMOD 528 529else 530# Dummy target needed, because used as prerequisite 531include/config/auto.conf: ; 532endif # $(dot-config) 533 534# The all: target is the default when no target is given on the 535# command line. 536# This allow a user to issue only 'make' to build a kernel including modules 537# Defaults to vmlinux, but the arch makefile usually adds further targets 538all: vmlinux 539 540ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 541KBUILD_CFLAGS += -Os 542else 543KBUILD_CFLAGS += -O2 544endif 545 546include $(srctree)/arch/$(SRCARCH)/Makefile 547 548ifneq ($(CONFIG_FRAME_WARN),0) 549KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 550endif 551 552# Force gcc to behave correct even for buggy distributions 553ifndef CONFIG_CC_STACKPROTECTOR 554KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 555endif 556 557ifdef CONFIG_FRAME_POINTER 558KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 559else 560# Some targets (ARM with Thumb2, for example), can't be built with frame 561# pointers. For those, we don't have FUNCTION_TRACER automatically 562# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 563# incompatible with -fomit-frame-pointer with current GCC, so we don't use 564# -fomit-frame-pointer with FUNCTION_TRACER. 565ifndef CONFIG_FUNCTION_TRACER 566KBUILD_CFLAGS += -fomit-frame-pointer 567endif 568endif 569 570ifdef CONFIG_DEBUG_INFO 571KBUILD_CFLAGS += -g 572KBUILD_AFLAGS += -gdwarf-2 573endif 574 575ifdef CONFIG_DEBUG_INFO_REDUCED 576KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 577endif 578 579ifdef CONFIG_FUNCTION_TRACER 580KBUILD_CFLAGS += -pg 581ifdef CONFIG_DYNAMIC_FTRACE 582 ifdef CONFIG_HAVE_C_RECORDMCOUNT 583 BUILD_C_RECORDMCOUNT := y 584 export BUILD_C_RECORDMCOUNT 585 endif 586endif 587endif 588 589# We trigger additional mismatches with less inlining 590ifdef CONFIG_DEBUG_SECTION_MISMATCH 591KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 592endif 593 594# arch Makefile may override CC so keep this after arch Makefile is included 595NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 596CHECKFLAGS += $(NOSTDINC_FLAGS) 597 598# warn about C99 declaration after statement 599KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 600 601# disable pointer signed / unsigned warnings in gcc 4.0 602KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 603 604# disable invalid "can't wrap" optimizations for signed / pointers 605KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 606 607# conserve stack if available 608KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 609 610# check for 'asm goto' 611ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 612 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 613endif 614 615# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 616# But warn user when we do so 617warn-assign = \ 618$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 619 620ifneq ($(KCPPFLAGS),) 621 $(call warn-assign,CPPFLAGS) 622 KBUILD_CPPFLAGS += $(KCPPFLAGS) 623endif 624ifneq ($(KAFLAGS),) 625 $(call warn-assign,AFLAGS) 626 KBUILD_AFLAGS += $(KAFLAGS) 627endif 628ifneq ($(KCFLAGS),) 629 $(call warn-assign,CFLAGS) 630 KBUILD_CFLAGS += $(KCFLAGS) 631endif 632 633# Use --build-id when available. 634LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 635 $(call cc-ldoption, -Wl$(comma)--build-id,)) 636KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 637LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 638 639ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 640LDFLAGS_vmlinux += $(call ld-option, -X,) 641endif 642 643# Default kernel image to build when no specific target is given. 644# KBUILD_IMAGE may be overruled on the command line or 645# set in the environment 646# Also any assignments in arch/$(ARCH)/Makefile take precedence over 647# this default value 648export KBUILD_IMAGE ?= vmlinux 649 650# 651# INSTALL_PATH specifies where to place the updated kernel and system map 652# images. Default is /boot, but you can set it to other values 653export INSTALL_PATH ?= /boot 654 655# 656# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 657# relocations required by build roots. This is not defined in the 658# makefile but the argument can be passed to make if needed. 659# 660 661MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 662export MODLIB 663 664# 665# INSTALL_MOD_STRIP, if defined, will cause modules to be 666# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 667# the default option --strip-debug will be used. Otherwise, 668# INSTALL_MOD_STRIP will used as the options to the strip command. 669 670ifdef INSTALL_MOD_STRIP 671ifeq ($(INSTALL_MOD_STRIP),1) 672mod_strip_cmd = $(STRIP) --strip-debug 673else 674mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 675endif # INSTALL_MOD_STRIP=1 676else 677mod_strip_cmd = true 678endif # INSTALL_MOD_STRIP 679export mod_strip_cmd 680 681 682ifeq ($(KBUILD_EXTMOD),) 683core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 684 685vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 686 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 687 $(net-y) $(net-m) $(libs-y) $(libs-m))) 688 689vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 690 $(init-n) $(init-) \ 691 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 692 $(net-n) $(net-) $(libs-n) $(libs-)))) 693 694init-y := $(patsubst %/, %/built-in.o, $(init-y)) 695core-y := $(patsubst %/, %/built-in.o, $(core-y)) 696drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 697net-y := $(patsubst %/, %/built-in.o, $(net-y)) 698libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 699libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 700libs-y := $(libs-y1) $(libs-y2) 701 702# Build vmlinux 703# --------------------------------------------------------------------------- 704# vmlinux is built from the objects selected by $(vmlinux-init) and 705# $(vmlinux-main). Most are built-in.o files from top-level directories 706# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 707# Ordering when linking is important, and $(vmlinux-init) must be first. 708# 709# vmlinux 710# ^ 711# | 712# +-< $(vmlinux-init) 713# | +--< init/version.o + more 714# | 715# +--< $(vmlinux-main) 716# | +--< driver/built-in.o mm/built-in.o + more 717# | 718# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 719# 720# vmlinux version (uname -v) cannot be updated during normal 721# descending-into-subdirs phase since we do not yet know if we need to 722# update vmlinux. 723# Therefore this step is delayed until just before final link of vmlinux - 724# except in the kallsyms case where it is done just before adding the 725# symbols to the kernel. 726# 727# System.map is generated to document addresses of all kernel symbols 728 729vmlinux-init := $(head-y) $(init-y) 730vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 731vmlinux-all := $(vmlinux-init) $(vmlinux-main) 732vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 733export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 734 735# Rule to link vmlinux - also used during CONFIG_KALLSYMS 736# May be overridden by arch/$(ARCH)/Makefile 737quiet_cmd_vmlinux__ ?= LD $@ 738 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 739 -T $(vmlinux-lds) $(vmlinux-init) \ 740 --start-group $(vmlinux-main) --end-group \ 741 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 742 743# Generate new vmlinux version 744quiet_cmd_vmlinux_version = GEN .version 745 cmd_vmlinux_version = set -e; \ 746 if [ ! -r .version ]; then \ 747 rm -f .version; \ 748 echo 1 >.version; \ 749 else \ 750 mv .version .old_version; \ 751 expr 0$$(cat .old_version) + 1 >.version; \ 752 fi; \ 753 $(MAKE) $(build)=init 754 755# Generate System.map 756quiet_cmd_sysmap = SYSMAP 757 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 758 759# Link of vmlinux 760# If CONFIG_KALLSYMS is set .version is already updated 761# Generate System.map and verify that the content is consistent 762# Use + in front of the vmlinux_version rule to silent warning with make -j2 763# First command is ':' to allow us to use + in front of the rule 764define rule_vmlinux__ 765 : 766 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 767 768 $(call cmd,vmlinux__) 769 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 770 771 $(Q)$(if $($(quiet)cmd_sysmap), \ 772 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 773 $(cmd_sysmap) $@ System.map; \ 774 if [ $$? -ne 0 ]; then \ 775 rm -f $@; \ 776 /bin/false; \ 777 fi; 778 $(verify_kallsyms) 779endef 780 781 782ifdef CONFIG_KALLSYMS 783# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 784# It's a three stage process: 785# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 786# empty 787# Running kallsyms on that gives us .tmp_kallsyms1.o with 788# the right size - vmlinux version (uname -v) is updated during this step 789# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 790# but due to the added section, some addresses have shifted. 791# From here, we generate a correct .tmp_kallsyms2.o 792# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 793# o Verify that the System.map from vmlinux matches the map from 794# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 795# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 796# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 797# temporary bypass to allow the kernel to be built while the 798# maintainers work out what went wrong with kallsyms. 799 800ifdef CONFIG_KALLSYMS_EXTRA_PASS 801last_kallsyms := 3 802else 803last_kallsyms := 2 804endif 805 806kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 807 808define verify_kallsyms 809 $(Q)$(if $($(quiet)cmd_sysmap), \ 810 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 811 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 812 $(Q)cmp -s System.map .tmp_System.map || \ 813 (echo Inconsistent kallsyms data; \ 814 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 815 rm .tmp_kallsyms* ; /bin/false ) 816endef 817 818# Update vmlinux version before link 819# Use + in front of this rule to silent warning about make -j1 820# First command is ':' to allow us to use + in front of this rule 821cmd_ksym_ld = $(cmd_vmlinux__) 822define rule_ksym_ld 823 : 824 +$(call cmd,vmlinux_version) 825 $(call cmd,vmlinux__) 826 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 827endef 828 829# Generate .S file with all kernel symbols 830quiet_cmd_kallsyms = KSYM $@ 831 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 832 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 833 834.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 835 $(call if_changed_dep,as_o_S) 836 837.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 838 $(call cmd,kallsyms) 839 840# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 841.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 842 $(call if_changed_rule,ksym_ld) 843 844.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 845 $(call if_changed,vmlinux__) 846 847.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 848 $(call if_changed,vmlinux__) 849 850# Needs to visit scripts/ before $(KALLSYMS) can be used. 851$(KALLSYMS): scripts ; 852 853# Generate some data for debugging strange kallsyms problems 854debug_kallsyms: .tmp_map$(last_kallsyms) 855 856.tmp_map%: .tmp_vmlinux% FORCE 857 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 858 859.tmp_map3: .tmp_map2 860 861.tmp_map2: .tmp_map1 862 863endif # ifdef CONFIG_KALLSYMS 864 865# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 866# relevant sections renamed as per the linker script. 867quiet_cmd_vmlinux-modpost = LD $@ 868 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 869 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 870 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 871define rule_vmlinux-modpost 872 : 873 +$(call cmd,vmlinux-modpost) 874 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 875 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 876endef 877 878# vmlinux image - including updated kernel symbols 879vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 880ifdef CONFIG_HEADERS_CHECK 881 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 882endif 883ifdef CONFIG_SAMPLES 884 $(Q)$(MAKE) $(build)=samples 885endif 886ifdef CONFIG_BUILD_DOCSRC 887 $(Q)$(MAKE) $(build)=Documentation 888endif 889 $(call vmlinux-modpost) 890 $(call if_changed_rule,vmlinux__) 891 $(Q)rm -f .old_version 892 893# build vmlinux.o first to catch section mismatch errors early 894ifdef CONFIG_KALLSYMS 895.tmp_vmlinux1: vmlinux.o 896endif 897 898modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 899vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 900 $(call if_changed_rule,vmlinux-modpost) 901 902# The actual objects are generated when descending, 903# make sure no implicit rule kicks in 904$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 905 906# Handle descending into subdirectories listed in $(vmlinux-dirs) 907# Preset locale variables to speed up the build process. Limit locale 908# tweaks to this spot to avoid wrong language settings when running 909# make menuconfig etc. 910# Error messages still appears in the original language 911 912PHONY += $(vmlinux-dirs) 913$(vmlinux-dirs): prepare scripts 914 $(Q)$(MAKE) $(build)=$@ 915 916# Store (new) KERNELRELASE string in include/config/kernel.release 917include/config/kernel.release: include/config/auto.conf FORCE 918 $(Q)rm -f $@ 919 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 920 921 922# Things we need to do before we recursively start building the kernel 923# or the modules are listed in "prepare". 924# A multi level approach is used. prepareN is processed before prepareN-1. 925# archprepare is used in arch Makefiles and when processed asm symlink, 926# version.h and scripts_basic is processed / created. 927 928# Listed in dependency order 929PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 930 931# prepare3 is used to check if we are building in a separate output directory, 932# and if so do: 933# 1) Check that make has not been executed in the kernel src $(srctree) 934prepare3: include/config/kernel.release 935ifneq ($(KBUILD_SRC),) 936 @$(kecho) ' Using $(srctree) as source for kernel' 937 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 938 echo " $(srctree) is not clean, please run 'make mrproper'";\ 939 echo " in the '$(srctree)' directory.";\ 940 /bin/false; \ 941 fi; 942endif 943 944# prepare2 creates a makefile if using a separate output directory 945prepare2: prepare3 outputmakefile 946 947prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 948 include/config/auto.conf 949 $(cmd_crmodverdir) 950 951archprepare: prepare1 scripts_basic 952 953prepare0: archprepare FORCE 954 $(Q)$(MAKE) $(build)=. 955 $(Q)$(MAKE) $(build)=. missing-syscalls 956 957# All the preparing.. 958prepare: prepare0 959 960# Generate some files 961# --------------------------------------------------------------------------- 962 963# KERNELRELEASE can change from a few different places, meaning version.h 964# needs to be updated, so this check is forced on all builds 965 966uts_len := 64 967define filechk_utsrelease.h 968 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 969 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 970 exit 1; \ 971 fi; \ 972 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 973endef 974 975define filechk_version.h 976 (echo \#define LINUX_VERSION_CODE $(shell \ 977 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 978 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 979endef 980 981include/linux/version.h: $(srctree)/Makefile FORCE 982 $(call filechk,version.h) 983 984include/generated/utsrelease.h: include/config/kernel.release FORCE 985 $(call filechk,utsrelease.h) 986 987PHONY += headerdep 988headerdep: 989 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 990 991# --------------------------------------------------------------------------- 992 993PHONY += depend dep 994depend dep: 995 @echo '*** Warning: make $@ is unnecessary now.' 996 997# --------------------------------------------------------------------------- 998# Firmware install 999INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1000export INSTALL_FW_PATH
1001 1002PHONY += firmware_install 1003firmware_install: FORCE 1004 @mkdir -p $(objtree)/firmware 1005 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1006 1007# --------------------------------------------------------------------------- 1008# Kernel headers 1009 1010#Default location for installed headers 1011export INSTALL_HDR_PATH = $(objtree)/usr 1012 1013hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1014 1015# If we do an all arch process set dst to asm-$(hdr-arch) 1016hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1017 1018PHONY += __headers 1019__headers: include/linux/version.h scripts_basic FORCE 1020 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1021 1022PHONY += headers_install_all 1023headers_install_all: 1024 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1025 1026PHONY += headers_install 1027headers_install: __headers 1028 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1029 $(error Headers not exportable for the $(SRCARCH) architecture)) 1030 $(Q)$(MAKE) $(hdr-inst)=include 1031 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1032 1033PHONY += headers_check_all 1034headers_check_all: headers_install_all 1035 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1036 1037PHONY += headers_check 1038headers_check: headers_install 1039 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1040 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1041 1042# --------------------------------------------------------------------------- 1043# Modules 1044 1045ifdef CONFIG_MODULES 1046 1047# By default, build modules as well 1048 1049all: modules 1050 1051# Build modules 1052# 1053# A module can be listed more than once in obj-m resulting in 1054# duplicate lines in modules.order files. Those are removed 1055# using awk while concatenating to the final file. 1056 1057PHONY += modules 1058modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1059 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1060 @$(kecho) ' Building modules, stage 2.'; 1061 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1062 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1063 1064modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1065 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1066 1067%/modules.builtin: include/config/auto.conf 1068 $(Q)$(MAKE) $(modbuiltin)=$* 1069 1070 1071# Target to prepare building external modules 1072PHONY += modules_prepare 1073modules_prepare: prepare scripts 1074 1075# Target to install modules 1076PHONY += modules_install 1077modules_install: _modinst_ _modinst_post 1078 1079PHONY += _modinst_ 1080_modinst_: 1081 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1082 echo "Warning: you may need to install module-init-tools"; \ 1083 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1084 sleep 1; \ 1085 fi 1086 @rm -rf $(MODLIB)/kernel 1087 @rm -f $(MODLIB)/source 1088 @mkdir -p $(MODLIB)/kernel 1089 @ln -s $(srctree) $(MODLIB)/source 1090 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1091 rm -f $(MODLIB)/build ; \ 1092 ln -s $(objtree) $(MODLIB)/build ; \ 1093 fi 1094 @cp -f $(objtree)/modules.order $(MODLIB)/ 1095 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1096 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1097 1098# This depmod is only for convenience to give the initial 1099# boot a modules.dep even before / is mounted read-write. However the 1100# boot script depmod is the master version. 1101PHONY += _modinst_post 1102_modinst_post: _modinst_ 1103 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1104 $(call cmd,depmod) 1105 1106else # CONFIG_MODULES 1107 1108# Modules not configured 1109# --------------------------------------------------------------------------- 1110 1111modules modules_install: FORCE 1112 @echo 1113 @echo "The present kernel configuration has modules disabled." 1114 @echo "Type 'make config' and enable loadable module support." 1115 @echo "Then build a kernel with module support enabled." 1116 @echo 1117 @exit 1 1118 1119endif # CONFIG_MODULES 1120 1121### 1122# Cleaning is done on three levels. 1123# make clean Delete most generated files 1124# Leave enough to build external modules 1125# make mrproper Delete the current configuration, and all generated files 1126# make distclean Remove editor backup files, patch leftover files and the like 1127 1128# Directories & files removed with 'make clean' 1129CLEAN_DIRS += $(MODVERDIR) 1130CLEAN_FILES += vmlinux System.map \ 1131 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1132 1133# Directories & files removed with 'make mrproper' 1134MRPROPER_DIRS += include/config usr/include include/generated 1135MRPROPER_FILES += .config .config.old .version .old_version \ 1136 include/linux/version.h \ 1137 Module.symvers tags TAGS cscope* 1138 1139# clean - Delete most, but leave enough to build external modules 1140# 1141clean: rm-dirs := $(CLEAN_DIRS) 1142clean: rm-files := $(CLEAN_FILES) 1143clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation) 1144 1145PHONY += $(clean-dirs) clean archclean 1146$(clean-dirs): 1147 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1148 1149clean: archclean 1150 1151# mrproper - Delete all generated files, including .config 1152# 1153mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1154mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1155mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1156 1157PHONY += $(mrproper-dirs) mrproper archmrproper 1158$(mrproper-dirs): 1159 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1160 1161mrproper: clean archmrproper $(mrproper-dirs) 1162 $(call cmd,rmdirs) 1163 $(call cmd,rmfiles) 1164 1165# distclean 1166# 1167PHONY += distclean 1168 1169distclean: mrproper 1170 @find $(srctree) $(RCS_FIND_IGNORE) \ 1171 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1172 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1173 -o -name '.*.rej' -o -size 0 \ 1174 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1175 -type f -print | xargs rm -f 1176 1177 1178# Packaging of the kernel to various formats 1179# --------------------------------------------------------------------------- 1180# rpm target kept for backward compatibility 1181package-dir := $(srctree)/scripts/package 1182 1183%src-pkg: FORCE 1184 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1185%pkg: include/config/kernel.release FORCE 1186 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1187rpm: include/config/kernel.release FORCE 1188 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1189 1190 1191# Brief documentation of the typical targets used 1192# --------------------------------------------------------------------------- 1193 1194boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1195boards := $(notdir $(boards)) 1196board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1197board-dirs := $(sort $(notdir $(board-dirs:/=))) 1198 1199help: 1200 @echo 'Cleaning targets:' 1201 @echo ' clean - Remove most generated files but keep the config and' 1202 @echo ' enough build support to build external modules' 1203 @echo ' mrproper - Remove all generated files + config + various backup files' 1204 @echo ' distclean - mrproper + remove editor backup and patch files' 1205 @echo '' 1206 @echo 'Configuration targets:' 1207 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1208 @echo '' 1209 @echo 'Other generic targets:' 1210 @echo ' all - Build all targets marked with [*]' 1211 @echo '* vmlinux - Build the bare kernel' 1212 @echo '* modules - Build all modules' 1213 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1214 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1215 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1216 @echo ' dir/ - Build all files in dir and below' 1217 @echo ' dir/file.[oisS] - Build specified target only' 1218 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1219 @echo ' (requires a recent binutils and recent build (System.map))' 1220 @echo ' dir/file.ko - Build module including final link' 1221 @echo ' modules_prepare - Set up for building external modules' 1222 @echo ' tags/TAGS - Generate tags file for editors' 1223 @echo ' cscope - Generate cscope index' 1224 @echo ' kernelrelease - Output the release version string' 1225 @echo ' kernelversion - Output the version stored in Makefile' 1226 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1227 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1228 echo '' 1229 @echo 'Static analysers' 1230 @echo ' checkstack - Generate a list of stack hogs' 1231 @echo ' namespacecheck - Name space analysis on compiled kernel' 1232 @echo ' versioncheck - Sanity check on version.h usage' 1233 @echo ' includecheck - Check for duplicate included header files' 1234 @echo ' export_report - List the usages of all exported symbols' 1235 @echo ' headers_check - Sanity check on exported headers' 1236 @echo ' headerdep - Detect inclusion cycles in headers' 1237 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1238 @echo '' 1239 @echo 'Kernel packaging:' 1240 @$(MAKE) $(build)=$(package-dir) help 1241 @echo '' 1242 @echo 'Documentation targets:' 1243 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1244 @echo '' 1245 @echo 'Architecture specific targets ($(SRCARCH)):' 1246 @$(if $(archhelp),$(archhelp),\ 1247 echo ' No architecture specific help defined for $(SRCARCH)') 1248 @echo '' 1249 @$(if $(boards), \ 1250 $(foreach b, $(boards), \ 1251 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1252 echo '') 1253 @$(if $(board-dirs), \ 1254 $(foreach b, $(board-dirs), \ 1255 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1256 printf " %-16s - Show all of the above\\n" help-boards; \ 1257 echo '') 1258 1259 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1260 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1261 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1262 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1263 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1264 @echo '' 1265 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1266 @echo 'For further info see the ./README file' 1267 1268 1269help-board-dirs := $(addprefix help-,$(board-dirs)) 1270 1271help-boards: $(help-board-dirs) 1272 1273boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1274 1275$(help-board-dirs): help-%: 1276 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1277 @$(if $(boards-per-dir), \ 1278 $(foreach b, $(boards-per-dir), \ 1279 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1280 echo '') 1281 1282 1283# Documentation targets 1284# --------------------------------------------------------------------------- 1285%docs: scripts_basic FORCE 1286 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1287 1288else # KBUILD_EXTMOD 1289 1290### 1291# External module support. 1292# When building external modules the kernel used as basis is considered 1293# read-only, and no consistency checks are made and the make 1294# system is not used on the basis kernel. If updates are required 1295# in the basis kernel ordinary make commands (without M=...) must 1296# be used. 1297# 1298# The following are the only valid targets when building external 1299# modules. 1300# make M=dir clean Delete all automatically generated files 1301# make M=dir modules Make all modules in specified dir 1302# make M=dir Same as 'make M=dir modules' 1303# make M=dir modules_install 1304# Install the modules built in the module directory 1305# Assumes install directory is already created 1306 1307# We are always building modules 1308KBUILD_MODULES := 1 1309PHONY += crmodverdir 1310crmodverdir: 1311 $(cmd_crmodverdir) 1312 1313PHONY += $(objtree)/Module.symvers 1314$(objtree)/Module.symvers: 1315 @test -e $(objtree)/Module.symvers || ( \ 1316 echo; \ 1317 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1318 echo " is missing; modules will have no dependencies and modversions."; \ 1319 echo ) 1320 1321module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1322PHONY += $(module-dirs) modules 1323$(module-dirs): crmodverdir $(objtree)/Module.symvers 1324 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1325 1326modules: $(module-dirs) 1327 @$(kecho) ' Building modules, stage 2.'; 1328 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1329 1330PHONY += modules_install 1331modules_install: _emodinst_ _emodinst_post 1332 1333install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1334PHONY += _emodinst_ 1335_emodinst_: 1336 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1337 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1338 1339PHONY += _emodinst_post 1340_emodinst_post: _emodinst_ 1341 $(call cmd,depmod) 1342 1343clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1344 1345PHONY += $(clean-dirs) clean 1346$(clean-dirs): 1347 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1348 1349clean: rm-dirs := $(MODVERDIR) 1350clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1351 1352help: 1353 @echo ' Building external modules.' 1354 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1355 @echo '' 1356 @echo ' modules - default target, build the module(s)' 1357 @echo ' modules_install - install the module' 1358 @echo ' clean - remove generated files in module directory only' 1359 @echo '' 1360 1361# Dummies... 1362PHONY += prepare scripts 1363prepare: ; 1364scripts: ; 1365endif # KBUILD_EXTMOD 1366 1367clean: $(clean-dirs) 1368 $(call cmd,rmdirs) 1369 $(call cmd,rmfiles) 1370 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1371 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1372 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1373 -o -name '*.symtypes' -o -name 'modules.order' \ 1374 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1375 -o -name '*.gcno' \) -type f -print | xargs rm -f 1376 1377# Generate tags for editors 1378# --------------------------------------------------------------------------- 1379quiet_cmd_tags = GEN $@ 1380 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1381 1382tags TAGS cscope: FORCE 1383 $(call cmd,tags) 1384 1385# Scripts to check various things for consistency 1386# --------------------------------------------------------------------------- 1387 1388includecheck: 1389 find * $(RCS_FIND_IGNORE) \ 1390 -name '*.[hcS]' -type f -print | sort \ 1391 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1392 1393versioncheck: 1394 find * $(RCS_FIND_IGNORE) \ 1395 -name '*.[hcS]' -type f -print | sort \ 1396 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1397 1398coccicheck: 1399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1400 1401namespacecheck: 1402 $(PERL) $(srctree)/scripts/namespace.pl 1403 1404export_report: 1405 $(PERL) $(srctree)/scripts/export_report.pl 1406 1407endif #ifeq ($(config-targets),1) 1408endif #ifeq ($(mixed-targets),1) 1409 1410PHONY += checkstack kernelrelease kernelversion 1411 1412# UML needs a little special treatment here. It wants to use the host 1413# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1414# else wants $(ARCH), including people doing cross-builds, which means 1415# that $(SUBARCH) doesn't work here. 1416ifeq ($(ARCH), um) 1417CHECKSTACK_ARCH := $(SUBARCH) 1418else 1419CHECKSTACK_ARCH := $(ARCH) 1420endif 1421checkstack: 1422 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1423 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1424 1425kernelrelease: 1426 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1427 1428kernelversion: 1429 @echo $(KERNELVERSION) 1430 1431# Single targets 1432# --------------------------------------------------------------------------- 1433# Single targets are compatible with: 1434# - build with mixed source and output 1435# - build with separate output dir 'make O=...' 1436# - external modules 1437# 1438# target-dir => where to store outputfile 1439# build-dir => directory in kernel source tree to use 1440 1441ifeq ($(KBUILD_EXTMOD),) 1442 build-dir = $(patsubst %/,%,$(dir $@)) 1443 target-dir = $(dir $@) 1444else 1445 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1446 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1447 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1448endif 1449 1450%.s: %.c prepare scripts FORCE 1451 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1452%.i: %.c prepare scripts FORCE 1453 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1454%.o: %.c prepare scripts FORCE 1455 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1456%.lst: %.c prepare scripts FORCE 1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1458%.s: %.S prepare scripts FORCE 1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1460%.o: %.S prepare scripts FORCE 1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1462%.symtypes: %.c prepare scripts FORCE 1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1464 1465# Modules 1466/: prepare scripts FORCE 1467 $(cmd_crmodverdir) 1468 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1469 $(build)=$(build-dir) 1470%/: prepare scripts FORCE 1471 $(cmd_crmodverdir) 1472 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1473 $(build)=$(build-dir) 1474%.ko: prepare scripts FORCE 1475 $(cmd_crmodverdir) 1476 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1477 $(build)=$(build-dir) $(@:.ko=.o) 1478 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1479 1480# FIXME Should go into a make.lib or something 1481# =========================================================================== 1482 1483quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1484 cmd_rmdirs = rm -rf $(rm-dirs) 1485 1486quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1487 cmd_rmfiles = rm -f $(rm-files) 1488 1489# Run depmod only if we have System.map and depmod is executable 1490quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1491 cmd_depmod = \ 1492 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1493 $(DEPMOD) -ae -F System.map \ 1494 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1495 $(KERNELRELEASE); \ 1496 fi 1497 1498# Create temporary dir for module support files 1499# clean it up only when building all modules 1500cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1501 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1502 1503a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1504 $(KBUILD_AFLAGS_KERNEL) \ 1505 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1506 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1507 1508quiet_cmd_as_o_S = AS $@ 1509cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1510 1511# read all saved command lines 1512 1513targets := $(wildcard $(sort $(targets))) 1514cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1515 1516ifneq ($(cmd_files),) 1517 $(cmd_files): ; # Do not try to update included dependency files 1518 include $(cmd_files) 1519endif 1520 1521# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1522# Usage: 1523# $(Q)$(MAKE) $(clean)=dir 1524clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1525 1526endif # skip-makefile 1527 1528PHONY += FORCE 1529FORCE: 1530 1531# Declare the contents of the .PHONY variable as phony. We keep that 1532# information in a variable so we can use it in if_changed and friends. 1533.PHONY: $(PHONY) 1534