1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 33 4EXTRAVERSION = -rc1 5NAME = Man-Eating Seals of Antiquity 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# Do not: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# Avoid funny character set dependencies 20unexport LC_ALL 21LC_CTYPE=C 22LC_COLLATE=C 23LC_NUMERIC=C 24export LC_CTYPE LC_COLLATE LC_NUMERIC 25 26# We are using a recursive build, so we need to do a little thinking 27# to get the ordering right. 28# 29# Most importantly: sub-Makefiles should only ever modify files in 30# their own directory. If in some directory we have a dependency on 31# a file in another dir (which doesn't happen often, but it's often 32# unavoidable when linking the built-in.o targets which finally 33# turn into vmlinux), we will call a sub make in that other dir, and 34# after that we are sure that everything which is in that other dir 35# is now up to date. 36# 37# The only cases where we need to modify files which have global 38# effects are thus separated out and done before the recursive 39# descending is started. They are now explicitly listed as the 40# prepare rule. 41 42# To put more focus on warnings, be less verbose as default 43# Use 'make V=1' to see the full commands 44 45ifeq ("$(origin V)", "command line") 46 KBUILD_VERBOSE = $(V) 47endif 48ifndef KBUILD_VERBOSE 49 KBUILD_VERBOSE = 0 50endif 51 52# Call a source code checker (by default, "sparse") as part of the 53# C compilation. 54# 55# Use 'make C=1' to enable checking of only re-compiled files. 56# Use 'make C=2' to enable checking of *all* source files, regardless 57# of whether they are re-compiled or not. 58# 59# See the file "Documentation/sparse.txt" for more details, including 60# where to get the "sparse" utility. 61 62ifeq ("$(origin C)", "command line") 63 KBUILD_CHECKSRC = $(C) 64endif 65ifndef KBUILD_CHECKSRC 66 KBUILD_CHECKSRC = 0 67endif 68 69# Use make M=dir to specify directory of external module to build 70# Old syntax make ... SUBDIRS=$PWD is still supported 71# Setting the environment variable KBUILD_EXTMOD take precedence 72ifdef SUBDIRS 73 KBUILD_EXTMOD ?= $(SUBDIRS) 74endif 75 76ifeq ("$(origin M)", "command line") 77 KBUILD_EXTMOD := $(M) 78endif 79 80# kbuild supports saving output files in a separate directory. 81# To locate output files in a separate directory two syntaxes are supported. 82# In both cases the working directory must be the root of the kernel src. 83# 1) O= 84# Use "make O=dir/to/store/output/files/" 85# 86# 2) Set KBUILD_OUTPUT 87# Set the environment variable KBUILD_OUTPUT to point to the directory 88# where the output files shall be placed. 89# export KBUILD_OUTPUT=dir/to/store/output/files/ 90# make 91# 92# The O= assignment takes precedence over the KBUILD_OUTPUT environment 93# variable. 94 95 96# KBUILD_SRC is set on invocation of make in OBJ directory 97# KBUILD_SRC is not intended to be used by the regular user (for now) 98ifeq ($(KBUILD_SRC),) 99 100# OK, Make called in directory where kernel src resides 101# Do we want to locate output files in a separate directory? 102ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104endif 105 106# That's our default target when none is given on the command line 107PHONY := _all 108_all: 109 110# Cancel implicit rules on top Makefile 111$(CURDIR)/Makefile Makefile: ; 112 113ifneq ($(KBUILD_OUTPUT),) 114# Invoke a second make in the output directory, passing relevant variables 115# check that the output directory actually exists 116saved-output := $(KBUILD_OUTPUT) 117KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 118$(if $(KBUILD_OUTPUT),, \ 119 $(error output directory "$(saved-output)" does not exist)) 120 121PHONY += $(MAKECMDGOALS) sub-make 122 123$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 124 $(Q)@: 125 126sub-make: FORCE 127 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 128 KBUILD_SRC=$(CURDIR) \ 129 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 130 $(filter-out _all sub-make,$(MAKECMDGOALS)) 131 132# Leave processing to above invocation of make 133skip-makefile := 1 134endif # ifneq ($(KBUILD_OUTPUT),) 135endif # ifeq ($(KBUILD_SRC),) 136 137# We process the rest of the Makefile if this is the final invocation of make 138ifeq ($(skip-makefile),) 139 140# If building an external module we do not care about the all: rule 141# but instead _all depend on modules 142PHONY += all 143ifeq ($(KBUILD_EXTMOD),) 144_all: all 145else 146_all: modules 147endif 148 149srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 150objtree := $(CURDIR) 151src := $(srctree) 152obj := $(objtree) 153 154VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 155 156export srctree objtree VPATH 157 158 159# SUBARCH tells the usermode build what the underlying arch is. That is set 160# first, and if a usermode build is happening, the "ARCH=um" on the command 161# line overrides the setting of ARCH below. If a native build is happening, 162# then ARCH is assigned, getting whatever value it gets normally, and 163# SUBARCH is subsequently ignored. 164 165SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 166 -e s/arm.*/arm/ -e s/sa110/arm/ \ 167 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 168 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 169 -e s/sh[234].*/sh/ ) 170 171# Cross compiling and selecting different set of gcc/bin-utils 172# --------------------------------------------------------------------------- 173# 174# When performing cross compilation for other architectures ARCH shall be set 175# to the target architecture. (See arch/* for the possibilities). 176# ARCH can be set during invocation of make: 177# make ARCH=ia64 178# Another way is to have ARCH set in the environment. 179# The default ARCH is the host where make is executed. 180 181# CROSS_COMPILE specify the prefix used for all executables used 182# during compilation. Only gcc and related bin-utils executables 183# are prefixed with $(CROSS_COMPILE). 184# CROSS_COMPILE can be set on the command line 185# make CROSS_COMPILE=ia64-linux- 186# Alternatively CROSS_COMPILE can be set in the environment. 187# Default value for CROSS_COMPILE is not to prefix executables 188# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 189export KBUILD_BUILDHOST := $(SUBARCH) 190ARCH ?= $(SUBARCH) 191CROSS_COMPILE ?= 192 193# Architecture as present in compile.h 194UTS_MACHINE := $(ARCH) 195SRCARCH := $(ARCH) 196 197# Additional ARCH settings for x86 198ifeq ($(ARCH),i386) 199 SRCARCH := x86 200endif 201ifeq ($(ARCH),x86_64) 202 SRCARCH := x86 203endif 204 205# Additional ARCH settings for sparc 206ifeq ($(ARCH),sparc64) 207 SRCARCH := sparc 208endif 209 210# Additional ARCH settings for sh 211ifeq ($(ARCH),sh64) 212 SRCARCH := sh 213endif 214 215# Where to locate arch specific headers 216hdr-arch := $(SRCARCH) 217 218ifeq ($(ARCH),m68knommu) 219 hdr-arch := m68k 220endif 221 222KCONFIG_CONFIG ?= .config 223 224# SHELL used by kbuild 225CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 226 else if [ -x /bin/bash ]; then echo /bin/bash; \ 227 else echo sh; fi ; fi) 228 229HOSTCC = gcc 230HOSTCXX = g++ 231HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 232HOSTCXXFLAGS = -O2 233 234# Decide whether to build built-in, modular, or both. 235# Normally, just do built-in. 236 237KBUILD_MODULES := 238KBUILD_BUILTIN := 1 239 240# If we have only "make modules", don't compile built-in objects. 241# When we're building modules with modversions, we need to consider 242# the built-in objects during the descend as well, in order to 243# make sure the checksums are up to date before we record them. 244 245ifeq ($(MAKECMDGOALS),modules) 246 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 247endif 248 249# If we have "make <whatever> modules", compile modules 250# in addition to whatever we do anyway. 251# Just "make" or "make all" shall build modules as well 252 253ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 254 KBUILD_MODULES := 1 255endif 256 257ifeq ($(MAKECMDGOALS),) 258 KBUILD_MODULES := 1 259endif 260 261export KBUILD_MODULES KBUILD_BUILTIN 262export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 263 264# Beautify output 265# --------------------------------------------------------------------------- 266# 267# Normally, we echo the whole command before executing it. By making 268# that echo $($(quiet)$(cmd)), we now have the possibility to set 269# $(quiet) to choose other forms of output instead, e.g. 270# 271# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 272# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 273# 274# If $(quiet) is empty, the whole command will be printed. 275# If it is set to "quiet_", only the short version will be printed. 276# If it is set to "silent_", nothing will be printed at all, since 277# the variable $(silent_cmd_cc_o_c) doesn't exist. 278# 279# A simple variant is to prefix commands with $(Q) - that's useful 280# for commands that shall be hidden in non-verbose mode. 281# 282# $(Q)ln $@ :< 283# 284# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 285# If KBUILD_VERBOSE equals 1 then the above command is displayed. 286 287ifeq ($(KBUILD_VERBOSE),1) 288 quiet = 289 Q = 290else 291 quiet=quiet_ 292 Q = @ 293endif 294 295# If the user is running make -s (silent mode), suppress echoing of 296# commands 297 298ifneq ($(findstring s,$(MAKEFLAGS)),) 299 quiet=silent_ 300endif 301 302export quiet Q KBUILD_VERBOSE 303 304 305# Look for make include files relative to root of kernel src 306MAKEFLAGS += --include-dir=$(srctree) 307 308# We need some generic definitions (do not try to remake the file). 309$(srctree)/scripts/Kbuild.include: ; 310include $(srctree)/scripts/Kbuild.include 311 312# Make variables (CC, etc...) 313 314AS = $(CROSS_COMPILE)as 315LD = $(CROSS_COMPILE)ld 316CC = $(CROSS_COMPILE)gcc 317CPP = $(CC) -E 318AR = $(CROSS_COMPILE)ar 319NM = $(CROSS_COMPILE)nm 320STRIP = $(CROSS_COMPILE)strip 321OBJCOPY = $(CROSS_COMPILE)objcopy 322OBJDUMP = $(CROSS_COMPILE)objdump 323AWK = awk 324GENKSYMS = scripts/genksyms/genksyms 325INSTALLKERNEL := installkernel 326DEPMOD = /sbin/depmod 327KALLSYMS = scripts/kallsyms 328PERL = perl 329CHECK = sparse 330 331CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 332 -Wbitwise -Wno-return-void $(CF) 333MODFLAGS = -DMODULE 334CFLAGS_MODULE = $(MODFLAGS) 335AFLAGS_MODULE = $(MODFLAGS) 336LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds 337CFLAGS_KERNEL = 338AFLAGS_KERNEL = 339CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 340 341 342# Use LINUXINCLUDE when you must reference the include/ directory. 343# Needed to be compatible with the O= option 344LINUXINCLUDE := -I$(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 := -D__ASSEMBLY__ 356 357# Read KERNELRELEASE from include/config/kernel.release (if it exists) 358KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 359KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 360 361export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 362export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 363export CPP AR NM STRIP OBJCOPY OBJDUMP 364export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 365export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 366 367export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 368export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 369export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 370 371# When compiling out-of-tree modules, put MODVERDIR in the module 372# tree rather than in the kernel tree. The kernel tree might 373# even be read-only. 374export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 375 376# Files to ignore in find ... statements 377 378RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 379export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 380 381# =========================================================================== 382# Rules shared between *config targets and build targets 383 384# Basic helpers built in scripts/ 385PHONY += scripts_basic 386scripts_basic: 387 $(Q)$(MAKE) $(build)=scripts/basic 388 $(Q)rm -f .tmp_quiet_recordmcount 389 390# To avoid any implicit rule to kick in, define an empty command. 391scripts/basic/%: scripts_basic ; 392 393PHONY += outputmakefile 394# outputmakefile generates a Makefile in the output directory, if using a 395# separate output directory. This allows convenient use of make in the 396# output directory. 397outputmakefile: 398ifneq ($(KBUILD_SRC),) 399 $(Q)ln -fsn $(srctree) source 400 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 401 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 402endif 403 404# To make sure we do not include .config for any of the *config targets 405# catch them early, and hand them over to scripts/kconfig/Makefile 406# It is allowed to specify more targets when calling make, including 407# mixing *config targets and build targets. 408# For example 'make oldconfig all'. 409# Detect when mixed targets is specified, and make a second invocation 410# of make so .config is not included in this case either (for *config). 411 412no-dot-config-targets := clean mrproper distclean \ 413 cscope TAGS tags help %docs check% \ 414 include/linux/version.h headers_% \ 415 kernelrelease kernelversion 416 417config-targets := 0 418mixed-targets := 0 419dot-config := 1 420 421ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 422 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 423 dot-config := 0 424 endif 425endif 426 427ifeq ($(KBUILD_EXTMOD),) 428 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 429 config-targets := 1 430 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 431 mixed-targets := 1 432 endif 433 endif 434endif 435 436ifeq ($(mixed-targets),1) 437# =========================================================================== 438# We're called with mixed targets (*config and build targets). 439# Handle them one by one. 440 441%:: FORCE 442 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 443 444else 445ifeq ($(config-targets),1) 446# =========================================================================== 447# *config targets only - make sure prerequisites are updated, and descend 448# in scripts/kconfig to make the *config target 449 450# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 451# KBUILD_DEFCONFIG may point out an alternative default configuration 452# used for 'make defconfig' 453include $(srctree)/arch/$(SRCARCH)/Makefile 454export KBUILD_DEFCONFIG KBUILD_KCONFIG 455 456config: scripts_basic outputmakefile FORCE 457 $(Q)mkdir -p include/linux include/config 458 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 459 460%config: scripts_basic outputmakefile FORCE 461 $(Q)mkdir -p include/linux include/config 462 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 463 464else 465# =========================================================================== 466# Build targets only - this includes vmlinux, arch specific targets, clean 467# targets and others. In general all targets except *config targets. 468 469ifeq ($(KBUILD_EXTMOD),) 470# Additional helpers built in scripts/ 471# Carefully list dependencies so we do not try to build scripts twice 472# in parallel 473PHONY += scripts 474scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 475 $(Q)$(MAKE) $(build)=$(@) 476 477# Objects we will link into vmlinux / subdirs we need to visit 478init-y := init/ 479drivers-y := drivers/ sound/ firmware/ 480net-y := net/ 481libs-y := lib/ 482core-y := usr/ 483endif # KBUILD_EXTMOD 484 485ifeq ($(dot-config),1) 486# Read in config 487-include include/config/auto.conf 488 489ifeq ($(KBUILD_EXTMOD),) 490# Read in dependencies to all Kconfig* files, make sure to run 491# oldconfig if changes are detected. 492-include include/config/auto.conf.cmd 493 494# To avoid any implicit rule to kick in, define an empty command 495$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 496 497# If .config is newer than include/config/auto.conf, someone tinkered 498# with it and forgot to run make oldconfig. 499# if auto.conf.cmd is missing then we are probably in a cleaned tree so 500# we execute the config step to be sure to catch updated Kconfig files 501include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 502 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 503else 504# external modules needs include/generated/autoconf.h and include/config/auto.conf 505# but do not care if they are up-to-date. Use auto.conf to trigger the test 506PHONY += include/config/auto.conf 507 508include/config/auto.conf: 509 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 510 echo; \ 511 echo " ERROR: Kernel configuration is invalid."; \ 512 echo " include/generated/autoconf.h or $@ are missing.";\ 513 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 514 echo; \ 515 /bin/false) 516 517endif # KBUILD_EXTMOD 518 519else 520# Dummy target needed, because used as prerequisite 521include/config/auto.conf: ; 522endif # $(dot-config) 523 524# The all: target is the default when no target is given on the 525# command line. 526# This allow a user to issue only 'make' to build a kernel including modules 527# Defaults vmlinux but it is usually overridden in the arch makefile 528all: vmlinux 529 530ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 531KBUILD_CFLAGS += -Os 532else 533KBUILD_CFLAGS += -O2 534endif 535 536include $(srctree)/arch/$(SRCARCH)/Makefile 537 538ifneq ($(CONFIG_FRAME_WARN),0) 539KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 540endif 541 542# Force gcc to behave correct even for buggy distributions 543ifndef CONFIG_CC_STACKPROTECTOR 544KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 545endif 546 547ifdef CONFIG_FRAME_POINTER 548KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 549else 550KBUILD_CFLAGS += -fomit-frame-pointer 551endif 552 553ifdef CONFIG_DEBUG_INFO 554KBUILD_CFLAGS += -g 555KBUILD_AFLAGS += -gdwarf-2 556endif 557 558ifdef CONFIG_FUNCTION_TRACER 559KBUILD_CFLAGS += -pg 560endif 561 562# We trigger additional mismatches with less inlining 563ifdef CONFIG_DEBUG_SECTION_MISMATCH 564KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 565endif 566 567# arch Makefile may override CC so keep this after arch Makefile is included 568NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 569CHECKFLAGS += $(NOSTDINC_FLAGS) 570 571# warn about C99 declaration after statement 572KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 573 574# disable pointer signed / unsigned warnings in gcc 4.0 575KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 576 577# disable invalid "can't wrap" optimizations for signed / pointers 578KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 579 580# revert to pre-gcc-4.4 behaviour of .eh_frame 581KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 582 583# conserve stack if available 584KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 585 586# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 587# But warn user when we do so 588warn-assign = \ 589$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 590 591ifneq ($(KCPPFLAGS),) 592 $(call warn-assign,CPPFLAGS) 593 KBUILD_CPPFLAGS += $(KCPPFLAGS) 594endif 595ifneq ($(KAFLAGS),) 596 $(call warn-assign,AFLAGS) 597 KBUILD_AFLAGS += $(KAFLAGS) 598endif 599ifneq ($(KCFLAGS),) 600 $(call warn-assign,CFLAGS) 601 KBUILD_CFLAGS += $(KCFLAGS) 602endif 603 604# Use --build-id when available. 605LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 606 $(call cc-ldoption, -Wl$(comma)--build-id,)) 607LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 608LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 609 610ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 611LDFLAGS_vmlinux += $(call ld-option, -X,) 612endif 613 614# Default kernel image to build when no specific target is given. 615# KBUILD_IMAGE may be overruled on the command line or 616# set in the environment 617# Also any assignments in arch/$(ARCH)/Makefile take precedence over 618# this default value 619export KBUILD_IMAGE ?= vmlinux 620 621# 622# INSTALL_PATH specifies where to place the updated kernel and system map 623# images. Default is /boot, but you can set it to other values 624export INSTALL_PATH ?= /boot 625 626# 627# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 628# relocations required by build roots. This is not defined in the 629# makefile but the argument can be passed to make if needed. 630# 631 632MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 633export MODLIB 634 635# 636# INSTALL_MOD_STRIP, if defined, will cause modules to be 637# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 638# the default option --strip-debug will be used. Otherwise, 639# INSTALL_MOD_STRIP will used as the options to the strip command. 640 641ifdef INSTALL_MOD_STRIP 642ifeq ($(INSTALL_MOD_STRIP),1) 643mod_strip_cmd = $(STRIP) --strip-debug 644else 645mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 646endif # INSTALL_MOD_STRIP=1 647else 648mod_strip_cmd = true 649endif # INSTALL_MOD_STRIP 650export mod_strip_cmd 651 652 653ifeq ($(KBUILD_EXTMOD),) 654core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 655 656vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 657 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 658 $(net-y) $(net-m) $(libs-y) $(libs-m))) 659 660vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 661 $(init-n) $(init-) \ 662 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 663 $(net-n) $(net-) $(libs-n) $(libs-)))) 664 665init-y := $(patsubst %/, %/built-in.o, $(init-y)) 666core-y := $(patsubst %/, %/built-in.o, $(core-y)) 667drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 668net-y := $(patsubst %/, %/built-in.o, $(net-y)) 669libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 670libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 671libs-y := $(libs-y1) $(libs-y2) 672 673# Build vmlinux 674# --------------------------------------------------------------------------- 675# vmlinux is built from the objects selected by $(vmlinux-init) and 676# $(vmlinux-main). Most are built-in.o files from top-level directories 677# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 678# Ordering when linking is important, and $(vmlinux-init) must be first. 679# 680# vmlinux 681# ^ 682# | 683# +-< $(vmlinux-init) 684# | +--< init/version.o + more 685# | 686# +--< $(vmlinux-main) 687# | +--< driver/built-in.o mm/built-in.o + more 688# | 689# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 690# 691# vmlinux version (uname -v) cannot be updated during normal 692# descending-into-subdirs phase since we do not yet know if we need to 693# update vmlinux. 694# Therefore this step is delayed until just before final link of vmlinux - 695# except in the kallsyms case where it is done just before adding the 696# symbols to the kernel. 697# 698# System.map is generated to document addresses of all kernel symbols 699 700vmlinux-init := $(head-y) $(init-y) 701vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 702vmlinux-all := $(vmlinux-init) $(vmlinux-main) 703vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 704export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 705 706# Rule to link vmlinux - also used during CONFIG_KALLSYMS 707# May be overridden by arch/$(ARCH)/Makefile 708quiet_cmd_vmlinux__ ?= LD $@ 709 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 710 -T $(vmlinux-lds) $(vmlinux-init) \ 711 --start-group $(vmlinux-main) --end-group \ 712 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 713 714# Generate new vmlinux version 715quiet_cmd_vmlinux_version = GEN .version 716 cmd_vmlinux_version = set -e; \ 717 if [ ! -r .version ]; then \ 718 rm -f .version; \ 719 echo 1 >.version; \ 720 else \ 721 mv .version .old_version; \ 722 expr 0$$(cat .old_version) + 1 >.version; \ 723 fi; \ 724 $(MAKE) $(build)=init 725 726# Generate System.map 727quiet_cmd_sysmap = SYSMAP 728 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 729 730# Link of vmlinux 731# If CONFIG_KALLSYMS is set .version is already updated 732# Generate System.map and verify that the content is consistent 733# Use + in front of the vmlinux_version rule to silent warning with make -j2 734# First command is ':' to allow us to use + in front of the rule 735define rule_vmlinux__ 736 : 737 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 738 739 $(call cmd,vmlinux__) 740 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 741 742 $(Q)$(if $($(quiet)cmd_sysmap), \ 743 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 744 $(cmd_sysmap) $@ System.map; \ 745 if [ $$? -ne 0 ]; then \ 746 rm -f $@; \ 747 /bin/false; \ 748 fi; 749 $(verify_kallsyms) 750endef 751 752 753ifdef CONFIG_KALLSYMS 754# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 755# It's a three stage process: 756# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 757# empty 758# Running kallsyms on that gives us .tmp_kallsyms1.o with 759# the right size - vmlinux version (uname -v) is updated during this step 760# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 761# but due to the added section, some addresses have shifted. 762# From here, we generate a correct .tmp_kallsyms2.o 763# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 764# o Verify that the System.map from vmlinux matches the map from 765# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 766# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 767# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 768# temporary bypass to allow the kernel to be built while the 769# maintainers work out what went wrong with kallsyms. 770 771ifdef CONFIG_KALLSYMS_EXTRA_PASS 772last_kallsyms := 3 773else 774last_kallsyms := 2 775endif 776 777kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 778 779define verify_kallsyms 780 $(Q)$(if $($(quiet)cmd_sysmap), \ 781 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 782 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 783 $(Q)cmp -s System.map .tmp_System.map || \ 784 (echo Inconsistent kallsyms data; \ 785 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 786 rm .tmp_kallsyms* ; /bin/false ) 787endef 788 789# Update vmlinux version before link 790# Use + in front of this rule to silent warning about make -j1 791# First command is ':' to allow us to use + in front of this rule 792cmd_ksym_ld = $(cmd_vmlinux__) 793define rule_ksym_ld 794 : 795 +$(call cmd,vmlinux_version) 796 $(call cmd,vmlinux__) 797 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 798endef 799 800# Generate .S file with all kernel symbols 801quiet_cmd_kallsyms = KSYM $@ 802 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 803 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 804 805.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 806 $(call if_changed_dep,as_o_S) 807 808.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 809 $(call cmd,kallsyms) 810 811# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 812.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 813 $(call if_changed_rule,ksym_ld) 814 815.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 816 $(call if_changed,vmlinux__) 817 818.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 819 $(call if_changed,vmlinux__) 820 821# Needs to visit scripts/ before $(KALLSYMS) can be used. 822$(KALLSYMS): scripts ; 823 824# Generate some data for debugging strange kallsyms problems 825debug_kallsyms: .tmp_map$(last_kallsyms) 826 827.tmp_map%: .tmp_vmlinux% FORCE 828 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 829 830.tmp_map3: .tmp_map2 831 832.tmp_map2: .tmp_map1 833 834endif # ifdef CONFIG_KALLSYMS 835 836# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 837# relevant sections renamed as per the linker script. 838quiet_cmd_vmlinux-modpost = LD $@ 839 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 840 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 841 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 842define rule_vmlinux-modpost 843 : 844 +$(call cmd,vmlinux-modpost) 845 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 846 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 847endef 848 849# vmlinux image - including updated kernel symbols 850vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 851ifdef CONFIG_HEADERS_CHECK 852 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 853endif 854ifdef CONFIG_SAMPLES 855 $(Q)$(MAKE) $(build)=samples 856endif 857ifdef CONFIG_BUILD_DOCSRC 858 $(Q)$(MAKE) $(build)=Documentation 859endif 860 $(call vmlinux-modpost) 861 $(call if_changed_rule,vmlinux__) 862 $(Q)rm -f .old_version 863 864# build vmlinux.o first to catch section mismatch errors early 865ifdef CONFIG_KALLSYMS 866.tmp_vmlinux1: vmlinux.o 867endif 868 869modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 870vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 871 $(call if_changed_rule,vmlinux-modpost) 872 873# The actual objects are generated when descending, 874# make sure no implicit rule kicks in 875$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 876 877# Handle descending into subdirectories listed in $(vmlinux-dirs) 878# Preset locale variables to speed up the build process. Limit locale 879# tweaks to this spot to avoid wrong language settings when running 880# make menuconfig etc. 881# Error messages still appears in the original language 882 883PHONY += $(vmlinux-dirs) 884$(vmlinux-dirs): prepare scripts 885 $(Q)$(MAKE) $(build)=$@ 886ifdef CONFIG_MODULES 887 $(Q)$(MAKE) $(modbuiltin)=$@ 888endif 889 890# Build the kernel release string 891# 892# The KERNELRELEASE value built here is stored in the file 893# include/config/kernel.release, and is used when executing several 894# make targets, such as "make install" or "make modules_install." 895# 896# The eventual kernel release string consists of the following fields, 897# shown in a hierarchical format to show how smaller parts are concatenated 898# to form the larger and final value, with values coming from places like 899# the Makefile, kernel config options, make command line options and/or 900# SCM tag information. 901# 902# $(KERNELVERSION) 903# $(VERSION) eg, 2 904# $(PATCHLEVEL) eg, 6 905# $(SUBLEVEL) eg, 18 906# $(EXTRAVERSION) eg, -rc6 907# $(localver-full) 908# $(localver) 909# localversion* (files without backups, containing '~') 910# $(CONFIG_LOCALVERSION) (from kernel config setting) 911# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 912# ./scripts/setlocalversion (SCM tag, if one exists) 913# $(LOCALVERSION) (from make command line if provided) 914# 915# Note how the final $(localver-auto) string is included *only* if the 916# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 917# moment, only git is supported but other SCMs can edit the script 918# scripts/setlocalversion and add the appropriate checks as needed. 919 920pattern = ".*/localversion[^~]*" 921string = $(shell cat /dev/null \ 922 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 923 924localver = $(subst $(space),, $(string) \ 925 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 926 927# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 928# and if the SCM is know a tag from the SCM is appended. 929# The appended tag is determined by the SCM used. 930# 931# .scmversion is used when generating rpm packages so we do not loose 932# the version information from the SCM when we do the build of the kernel 933# from the copied source 934ifdef CONFIG_LOCALVERSION_AUTO 935 936ifeq ($(wildcard .scmversion),) 937 _localver-auto = $(shell $(CONFIG_SHELL) \ 938 $(srctree)/scripts/setlocalversion $(srctree)) 939else 940 _localver-auto = $(shell cat .scmversion 2> /dev/null) 941endif 942 943 localver-auto = $(LOCALVERSION)$(_localver-auto) 944endif 945 946localver-full = $(localver)$(localver-auto) 947 948# Store (new) KERNELRELASE string in include/config/kernel.release 949kernelrelease = $(KERNELVERSION)$(localver-full) 950include/config/kernel.release: include/config/auto.conf FORCE 951 $(Q)rm -f $@ 952 $(Q)echo $(kernelrelease) > $@ 953 954 955# Things we need to do before we recursively start building the kernel 956# or the modules are listed in "prepare". 957# A multi level approach is used. prepareN is processed before prepareN-1. 958# archprepare is used in arch Makefiles and when processed asm symlink, 959# version.h and scripts_basic is processed / created. 960 961# Listed in dependency order 962PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 963 964# prepare3 is used to check if we are building in a separate output directory, 965# and if so do: 966# 1) Check that make has not been executed in the kernel src $(srctree) 967prepare3: include/config/kernel.release 968ifneq ($(KBUILD_SRC),) 969 @$(kecho) ' Using $(srctree) as source for kernel' 970 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 971 echo " $(srctree) is not clean, please run 'make mrproper'";\ 972 echo " in the '$(srctree)' directory.";\ 973 /bin/false; \ 974 fi; 975endif 976 977# prepare2 creates a makefile if using a separate output directory 978prepare2: prepare3 outputmakefile 979 980prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 981 include/config/auto.conf 982 $(cmd_crmodverdir) 983 984archprepare: prepare1 scripts_basic 985 986prepare0: archprepare FORCE 987 $(Q)$(MAKE) $(build)=. 988 $(Q)$(MAKE) $(build)=. missing-syscalls 989 990# All the preparing.. 991prepare: prepare0 992 993# Generate some files 994# --------------------------------------------------------------------------- 995 996# KERNELRELEASE can change from a few different places, meaning version.h 997# needs to be updated, so this check is forced on all builds 998 999uts_len := 64 1000define filechk_utsrelease.h 1001 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1002 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1003 exit 1; \ 1004 fi; \ 1005 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1006endef 1007 1008define filechk_version.h 1009 (echo \#define LINUX_VERSION_CODE $(shell \ 1010 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1011 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1012endef 1013 1014include/linux/version.h: $(srctree)/Makefile FORCE 1015 $(call filechk,version.h) 1016 1017include/generated/utsrelease.h: include/config/kernel.release FORCE 1018 $(call filechk,utsrelease.h) 1019 1020PHONY += headerdep 1021headerdep: 1022 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1023 1024# --------------------------------------------------------------------------- 1025 1026PHONY += depend dep 1027depend dep: 1028 @echo '*** Warning: make $@ is unnecessary now.' 1029 1030# --------------------------------------------------------------------------- 1031# Firmware install 1032INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1033export INSTALL_FW_PATH 1034 1035PHONY += firmware_install 1036firmware_install: FORCE 1037 @mkdir -p $(objtree)/firmware 1038 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1039 1040# --------------------------------------------------------------------------- 1041# Kernel headers 1042 1043#Default location for installed headers 1044export INSTALL_HDR_PATH = $(objtree)/usr 1045 1046hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1047 1048# If we do an all arch process set dst to asm-$(hdr-arch) 1049hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1050 1051PHONY += __headers 1052__headers: include/linux/version.h scripts_basic FORCE 1053 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1054 1055PHONY += headers_install_all 1056headers_install_all: 1057 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1058 1059PHONY += headers_install 1060headers_install: __headers 1061 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1062 $(error Headers not exportable for the $(SRCARCH) architecture)) 1063 $(Q)$(MAKE) $(hdr-inst)=include 1064 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1065 1066PHONY += headers_check_all 1067headers_check_all: headers_install_all 1068 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1069 1070PHONY += headers_check 1071headers_check: headers_install 1072 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1073 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1074 1075# --------------------------------------------------------------------------- 1076# Modules 1077 1078ifdef CONFIG_MODULES 1079 1080# By default, build modules as well 1081 1082all: modules 1083 1084# Build modules 1085# 1086# A module can be listed more than once in obj-m resulting in 1087# duplicate lines in modules.order files. Those are removed 1088# using awk while concatenating to the final file. 1089 1090PHONY += modules 1091modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1092 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1093 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin 1094 @$(kecho) ' Building modules, stage 2.'; 1095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1096 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1097 1098 1099# Target to prepare building external modules 1100PHONY += modules_prepare 1101modules_prepare: prepare scripts 1102 1103# Target to install modules 1104PHONY += modules_install 1105modules_install: _modinst_ _modinst_post 1106 1107PHONY += _modinst_ 1108_modinst_: 1109 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1110 echo "Warning: you may need to install module-init-tools"; \ 1111 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1112 sleep 1; \ 1113 fi 1114 @rm -rf $(MODLIB)/kernel 1115 @rm -f $(MODLIB)/source 1116 @mkdir -p $(MODLIB)/kernel 1117 @ln -s $(srctree) $(MODLIB)/source 1118 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1119 rm -f $(MODLIB)/build ; \ 1120 ln -s $(objtree) $(MODLIB)/build ; \ 1121 fi 1122 @cp -f $(objtree)/modules.order $(MODLIB)/ 1123 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1124 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1125 1126# This depmod is only for convenience to give the initial 1127# boot a modules.dep even before / is mounted read-write. However the 1128# boot script depmod is the master version. 1129PHONY += _modinst_post 1130_modinst_post: _modinst_ 1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1132 $(call cmd,depmod) 1133 1134else # CONFIG_MODULES 1135 1136# Modules not configured 1137# --------------------------------------------------------------------------- 1138 1139modules modules_install: FORCE 1140 @echo 1141 @echo "The present kernel configuration has modules disabled." 1142 @echo "Type 'make config' and enable loadable module support." 1143 @echo "Then build a kernel with module support enabled." 1144 @echo 1145 @exit 1 1146 1147endif # CONFIG_MODULES 1148 1149### 1150# Cleaning is done on three levels. 1151# make clean Delete most generated files 1152# Leave enough to build external modules 1153# make mrproper Delete the current configuration, and all generated files 1154# make distclean Remove editor backup files, patch leftover files and the like 1155 1156# Directories & files removed with 'make clean' 1157CLEAN_DIRS += $(MODVERDIR) 1158CLEAN_FILES += vmlinux System.map \ 1159 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1160 1161# Directories & files removed with 'make mrproper' 1162MRPROPER_DIRS += include/config usr/include include/generated 1163MRPROPER_FILES += .config .config.old .version .old_version \ 1164 include/linux/version.h \ 1165 Module.symvers tags TAGS cscope* 1166 1167# clean - Delete most, but leave enough to build external modules 1168# 1169clean: rm-dirs := $(CLEAN_DIRS) 1170clean: rm-files := $(CLEAN_FILES) 1171clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1172 1173PHONY += $(clean-dirs) clean archclean 1174$(clean-dirs): 1175 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1176 1177clean: archclean $(clean-dirs) 1178 $(call cmd,rmdirs) 1179 $(call cmd,rmfiles) 1180 @find . $(RCS_FIND_IGNORE) \ 1181 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1182 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1183 -o -name '*.symtypes' -o -name 'modules.order' \ 1184 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1185 -o -name '*.gcno' \) -type f -print | xargs rm -f 1186 1187# mrproper - Delete all generated files, including .config 1188# 1189mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1190mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1191mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1192 1193PHONY += $(mrproper-dirs) mrproper archmrproper 1194$(mrproper-dirs): 1195 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1196 1197mrproper: clean archmrproper $(mrproper-dirs) 1198 $(call cmd,rmdirs) 1199 $(call cmd,rmfiles) 1200 1201# distclean 1202# 1203PHONY += distclean 1204 1205distclean: mrproper 1206 @find $(srctree) $(RCS_FIND_IGNORE) \ 1207 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1208 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1209 -o -name '.*.rej' -o -size 0 \ 1210 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1211 -type f -print | xargs rm -f 1212 1213 1214# Packaging of the kernel to various formats 1215# --------------------------------------------------------------------------- 1216# rpm target kept for backward compatibility 1217package-dir := $(srctree)/scripts/package 1218 1219%pkg: include/config/kernel.release FORCE 1220 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1221rpm: include/config/kernel.release FORCE 1222 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1223 1224 1225# Brief documentation of the typical targets used 1226# --------------------------------------------------------------------------- 1227 1228boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1229boards := $(notdir $(boards)) 1230board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1231board-dirs := $(sort $(notdir $(board-dirs:/=))) 1232 1233help: 1234 @echo 'Cleaning targets:' 1235 @echo ' clean - Remove most generated files but keep the config and' 1236 @echo ' enough build support to build external modules' 1237 @echo ' mrproper - Remove all generated files + config + various backup files' 1238 @echo ' distclean - mrproper + remove editor backup and patch files' 1239 @echo '' 1240 @echo 'Configuration targets:' 1241 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1242 @echo '' 1243 @echo 'Other generic targets:' 1244 @echo ' all - Build all targets marked with [*]' 1245 @echo '* vmlinux - Build the bare kernel' 1246 @echo '* modules - Build all modules' 1247 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1248 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1249 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1250 @echo ' dir/ - Build all files in dir and below' 1251 @echo ' dir/file.[ois] - Build specified target only' 1252 @echo ' dir/file.ko - Build module including final link' 1253 @echo ' modules_prepare - Set up for building external modules' 1254 @echo ' tags/TAGS - Generate tags file for editors' 1255 @echo ' cscope - Generate cscope index' 1256 @echo ' kernelrelease - Output the release version string' 1257 @echo ' kernelversion - Output the version stored in Makefile' 1258 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1259 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1260 echo '' 1261 @echo 'Static analysers' 1262 @echo ' checkstack - Generate a list of stack hogs' 1263 @echo ' namespacecheck - Name space analysis on compiled kernel' 1264 @echo ' versioncheck - Sanity check on version.h usage' 1265 @echo ' includecheck - Check for duplicate included header files' 1266 @echo ' export_report - List the usages of all exported symbols' 1267 @echo ' headers_check - Sanity check on exported headers' 1268 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1269 echo '' 1270 @echo 'Kernel packaging:' 1271 @$(MAKE) $(build)=$(package-dir) help 1272 @echo '' 1273 @echo 'Documentation targets:' 1274 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1275 @echo '' 1276 @echo 'Architecture specific targets ($(SRCARCH)):' 1277 @$(if $(archhelp),$(archhelp),\ 1278 echo ' No architecture specific help defined for $(SRCARCH)') 1279 @echo '' 1280 @$(if $(boards), \ 1281 $(foreach b, $(boards), \ 1282 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1283 echo '') 1284 @$(if $(board-dirs), \ 1285 $(foreach b, $(board-dirs), \ 1286 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1287 printf " %-16s - Show all of the above\\n" help-boards; \ 1288 echo '') 1289 1290 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1291 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1292 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1293 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1294 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1295 @echo '' 1296 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1297 @echo 'For further info see the ./README file' 1298 1299 1300help-board-dirs := $(addprefix help-,$(board-dirs)) 1301 1302help-boards: $(help-board-dirs) 1303 1304boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1305 1306$(help-board-dirs): help-%: 1307 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1308 @$(if $(boards-per-dir), \ 1309 $(foreach b, $(boards-per-dir), \ 1310 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1311 echo '') 1312 1313 1314# Documentation targets 1315# --------------------------------------------------------------------------- 1316%docs: scripts_basic FORCE 1317 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1318 1319else # KBUILD_EXTMOD 1320 1321### 1322# External module support. 1323# When building external modules the kernel used as basis is considered 1324# read-only, and no consistency checks are made and the make 1325# system is not used on the basis kernel. If updates are required 1326# in the basis kernel ordinary make commands (without M=...) must 1327# be used. 1328# 1329# The following are the only valid targets when building external 1330# modules. 1331# make M=dir clean Delete all automatically generated files 1332# make M=dir modules Make all modules in specified dir 1333# make M=dir Same as 'make M=dir modules' 1334# make M=dir modules_install 1335# Install the modules built in the module directory 1336# Assumes install directory is already created 1337 1338# We are always building modules 1339KBUILD_MODULES := 1 1340PHONY += crmodverdir 1341crmodverdir: 1342 $(cmd_crmodverdir) 1343 1344PHONY += $(objtree)/Module.symvers 1345$(objtree)/Module.symvers: 1346 @test -e $(objtree)/Module.symvers || ( \ 1347 echo; \ 1348 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1349 echo " is missing; modules will have no dependencies and modversions."; \ 1350 echo ) 1351 1352module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1353PHONY += $(module-dirs) modules 1354$(module-dirs): crmodverdir $(objtree)/Module.symvers 1355 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1356 1357modules: $(module-dirs) 1358 @$(kecho) ' Building modules, stage 2.'; 1359 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1360 1361PHONY += modules_install 1362modules_install: _emodinst_ _emodinst_post 1363 1364install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1365PHONY += _emodinst_ 1366_emodinst_: 1367 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1368 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1369 1370PHONY += _emodinst_post 1371_emodinst_post: _emodinst_ 1372 $(call cmd,depmod) 1373 1374clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1375 1376PHONY += $(clean-dirs) clean 1377$(clean-dirs): 1378 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1379 1380clean: rm-dirs := $(MODVERDIR) 1381clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1382 $(KBUILD_EXTMOD)/modules.order \ 1383 $(KBUILD_EXTMOD)/modules.builtin 1384clean: $(clean-dirs) 1385 $(call cmd,rmdirs) 1386 $(call cmd,rmfiles) 1387 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1388 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1389 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1390 -o -name '*.gcno' \) -type f -print | xargs rm -f 1391 1392help: 1393 @echo ' Building external modules.' 1394 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1395 @echo '' 1396 @echo ' modules - default target, build the module(s)' 1397 @echo ' modules_install - install the module' 1398 @echo ' clean - remove generated files in module directory only' 1399 @echo '' 1400 1401# Dummies... 1402PHONY += prepare scripts 1403prepare: ; 1404scripts: ; 1405endif # KBUILD_EXTMOD 1406 1407# Generate tags for editors 1408# --------------------------------------------------------------------------- 1409quiet_cmd_tags = GEN $@ 1410 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1411 1412tags TAGS cscope: FORCE 1413 $(call cmd,tags) 1414 1415# Scripts to check various things for consistency 1416# --------------------------------------------------------------------------- 1417 1418includecheck: 1419 find * $(RCS_FIND_IGNORE) \ 1420 -name '*.[hcS]' -type f -print | sort \ 1421 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1422 1423versioncheck: 1424 find * $(RCS_FIND_IGNORE) \ 1425 -name '*.[hcS]' -type f -print | sort \ 1426 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1427 1428namespacecheck: 1429 $(PERL) $(srctree)/scripts/namespace.pl 1430 1431export_report: 1432 $(PERL) $(srctree)/scripts/export_report.pl 1433 1434endif #ifeq ($(config-targets),1) 1435endif #ifeq ($(mixed-targets),1) 1436 1437PHONY += checkstack kernelrelease kernelversion 1438 1439# UML needs a little special treatment here. It wants to use the host 1440# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1441# else wants $(ARCH), including people doing cross-builds, which means 1442# that $(SUBARCH) doesn't work here. 1443ifeq ($(ARCH), um) 1444CHECKSTACK_ARCH := $(SUBARCH) 1445else 1446CHECKSTACK_ARCH := $(ARCH) 1447endif 1448checkstack: 1449 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1450 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1451 1452kernelrelease: 1453 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1454 $(error kernelrelease not valid - run 'make prepare' to update it)) 1455kernelversion: 1456 @echo $(KERNELVERSION) 1457 1458# Single targets 1459# --------------------------------------------------------------------------- 1460# Single targets are compatible with: 1461# - build with mixed source and output 1462# - build with separate output dir 'make O=...' 1463# - external modules 1464# 1465# target-dir => where to store outputfile 1466# build-dir => directory in kernel source tree to use 1467 1468ifeq ($(KBUILD_EXTMOD),) 1469 build-dir = $(patsubst %/,%,$(dir $@)) 1470 target-dir = $(dir $@) 1471else 1472 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1473 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1474 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1475endif 1476 1477%.s: %.c prepare scripts FORCE 1478 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1479%.i: %.c prepare scripts FORCE 1480 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1481%.o: %.c prepare scripts FORCE 1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1483%.lst: %.c prepare scripts FORCE 1484 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1485%.s: %.S prepare scripts FORCE 1486 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1487%.o: %.S prepare scripts FORCE 1488 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1489%.symtypes: %.c prepare scripts FORCE 1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1491 1492# Modules 1493/: prepare scripts FORCE 1494 $(cmd_crmodverdir) 1495 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1496 $(build)=$(build-dir) 1497%/: prepare scripts FORCE 1498 $(cmd_crmodverdir) 1499 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1500 $(build)=$(build-dir) 1501%.ko: prepare scripts FORCE 1502 $(cmd_crmodverdir) 1503 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1504 $(build)=$(build-dir) $(@:.ko=.o) 1505 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1506 1507# FIXME Should go into a make.lib or something 1508# =========================================================================== 1509 1510quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1511 cmd_rmdirs = rm -rf $(rm-dirs) 1512 1513quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1514 cmd_rmfiles = rm -f $(rm-files) 1515 1516# Run depmod only if we have System.map and depmod is executable 1517quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1518 cmd_depmod = \ 1519 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1520 $(DEPMOD) -ae -F System.map \ 1521 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1522 $(KERNELRELEASE); \ 1523 fi 1524 1525# Create temporary dir for module support files 1526# clean it up only when building all modules 1527cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1528 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1529 1530a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1531 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1532 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1533 1534quiet_cmd_as_o_S = AS $@ 1535cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1536 1537# read all saved command lines 1538 1539targets := $(wildcard $(sort $(targets))) 1540cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1541 1542ifneq ($(cmd_files),) 1543 $(cmd_files): ; # Do not try to update included dependency files 1544 include $(cmd_files) 1545endif 1546 1547# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1548# Usage: 1549# $(Q)$(MAKE) $(clean)=dir 1550clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1551 1552endif # skip-makefile 1553 1554PHONY += FORCE 1555FORCE: 1556 1557# Declare the contents of the .PHONY variable as phony. We keep that 1558# information in a variable so we can use it in if_changed and friends. 1559.PHONY: $(PHONY) 1560