1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 26 4EXTRAVERSION = 5NAME = Rotary Wombat 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# Do not: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(KBUILD_SRC),) 98 99# OK, Make called in directory where kernel src resides 100# Do we want to locate output files in a separate directory? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111# Cancel implicit rules on top Makefile 112$(CURDIR)/Makefile Makefile: ; 113 114ifneq ($(KBUILD_OUTPUT),) 115# Invoke a second make in the output directory, passing relevant variables 116# check that the output directory actually exists 117saved-output := $(KBUILD_OUTPUT) 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 119$(if $(KBUILD_OUTPUT),, \ 120 $(error output directory "$(saved-output)" does not exist)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 169 -e s/arm.*/arm/ -e s/sa110/arm/ \ 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 172 -e s/sh.*/sh/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192export KBUILD_BUILDHOST := $(SUBARCH) 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198SRCARCH := $(ARCH) 199 200# Additional ARCH settings for x86 201ifeq ($(ARCH),i386) 202 SRCARCH := x86 203endif 204ifeq ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208KCONFIG_CONFIG ?= .config 209 210# SHELL used by kbuild 211CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 212 else if [ -x /bin/bash ]; then echo /bin/bash; \ 213 else echo sh; fi ; fi) 214 215HOSTCC = gcc 216HOSTCXX = g++ 217HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 218HOSTCXXFLAGS = -O2 219 220# Decide whether to build built-in, modular, or both. 221# Normally, just do built-in. 222 223KBUILD_MODULES := 224KBUILD_BUILTIN := 1 225 226# If we have only "make modules", don't compile built-in objects. 227# When we're building modules with modversions, we need to consider 228# the built-in objects during the descend as well, in order to 229# make sure the checksums are up to date before we record them. 230 231ifeq ($(MAKECMDGOALS),modules) 232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 233endif 234 235# If we have "make <whatever> modules", compile modules 236# in addition to whatever we do anyway. 237# Just "make" or "make all" shall build modules as well 238 239ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 240 KBUILD_MODULES := 1 241endif 242 243ifeq ($(MAKECMDGOALS),) 244 KBUILD_MODULES := 1 245endif 246 247export KBUILD_MODULES KBUILD_BUILTIN 248export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 249 250# Beautify output 251# --------------------------------------------------------------------------- 252# 253# Normally, we echo the whole command before executing it. By making 254# that echo $($(quiet)$(cmd)), we now have the possibility to set 255# $(quiet) to choose other forms of output instead, e.g. 256# 257# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 258# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 259# 260# If $(quiet) is empty, the whole command will be printed. 261# If it is set to "quiet_", only the short version will be printed. 262# If it is set to "silent_", nothing will be printed at all, since 263# the variable $(silent_cmd_cc_o_c) doesn't exist. 264# 265# A simple variant is to prefix commands with $(Q) - that's useful 266# for commands that shall be hidden in non-verbose mode. 267# 268# $(Q)ln $@ :< 269# 270# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 271# If KBUILD_VERBOSE equals 1 then the above command is displayed. 272 273ifeq ($(KBUILD_VERBOSE),1) 274 quiet = 275 Q = 276else 277 quiet=quiet_ 278 Q = @ 279endif 280 281# If the user is running make -s (silent mode), suppress echoing of 282# commands 283 284ifneq ($(findstring s,$(MAKEFLAGS)),) 285 quiet=silent_ 286endif 287 288export quiet Q KBUILD_VERBOSE 289 290 291# Look for make include files relative to root of kernel src 292MAKEFLAGS += --include-dir=$(srctree) 293 294# We need some generic definitions (do not try to remake the file). 295$(srctree)/scripts/Kbuild.include: ; 296include $(srctree)/scripts/Kbuild.include 297 298# Make variables (CC, etc...) 299 300AS = $(CROSS_COMPILE)as 301LD = $(CROSS_COMPILE)ld 302CC = $(CROSS_COMPILE)gcc 303CPP = $(CC) -E 304AR = $(CROSS_COMPILE)ar 305NM = $(CROSS_COMPILE)nm 306STRIP = $(CROSS_COMPILE)strip 307OBJCOPY = $(CROSS_COMPILE)objcopy 308OBJDUMP = $(CROSS_COMPILE)objdump 309AWK = awk 310GENKSYMS = scripts/genksyms/genksyms 311DEPMOD = /sbin/depmod 312KALLSYMS = scripts/kallsyms 313PERL = perl 314CHECK = sparse 315 316CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 317MODFLAGS = -DMODULE 318CFLAGS_MODULE = $(MODFLAGS) 319AFLAGS_MODULE = $(MODFLAGS) 320LDFLAGS_MODULE = 321CFLAGS_KERNEL = 322AFLAGS_KERNEL = 323 324 325# Use LINUXINCLUDE when you must reference the include/ directory. 326# Needed to be compatible with the O= option 327LINUXINCLUDE := -Iinclude \ 328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 329 -include include/linux/autoconf.h 330 331KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 332 333KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 334 -fno-strict-aliasing -fno-common \ 335 -Werror-implicit-function-declaration 336KBUILD_AFLAGS := -D__ASSEMBLY__ 337 338# Read KERNELRELEASE from include/config/kernel.release (if it exists) 339KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 340KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 341 342export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 343export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 344export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 345export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 346 347export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 348export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 349export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 350 351# When compiling out-of-tree modules, put MODVERDIR in the module 352# tree rather than in the kernel tree. The kernel tree might 353# even be read-only. 354export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 355 356# Files to ignore in find ... statements 357 358RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 359export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 360 361# =========================================================================== 362# Rules shared between *config targets and build targets 363 364# Basic helpers built in scripts/ 365PHONY += scripts_basic 366scripts_basic: 367 $(Q)$(MAKE) $(build)=scripts/basic 368 369# To avoid any implicit rule to kick in, define an empty command. 370scripts/basic/%: scripts_basic ; 371 372PHONY += outputmakefile 373# outputmakefile generates a Makefile in the output directory, if using a 374# separate output directory. This allows convenient use of make in the 375# output directory. 376outputmakefile: 377ifneq ($(KBUILD_SRC),) 378 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 379 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 380endif 381 382# To make sure we do not include .config for any of the *config targets 383# catch them early, and hand them over to scripts/kconfig/Makefile 384# It is allowed to specify more targets when calling make, including 385# mixing *config targets and build targets. 386# For example 'make oldconfig all'. 387# Detect when mixed targets is specified, and make a second invocation 388# of make so .config is not included in this case either (for *config). 389 390no-dot-config-targets := clean mrproper distclean \ 391 cscope TAGS tags help %docs check% \ 392 include/linux/version.h headers_% \ 393 kernelrelease kernelversion 394 395config-targets := 0 396mixed-targets := 0 397dot-config := 1 398 399ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 400 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 401 dot-config := 0 402 endif 403endif 404 405ifeq ($(KBUILD_EXTMOD),) 406 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 407 config-targets := 1 408 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 409 mixed-targets := 1 410 endif 411 endif 412endif 413 414ifeq ($(mixed-targets),1) 415# =========================================================================== 416# We're called with mixed targets (*config and build targets). 417# Handle them one by one. 418 419%:: FORCE 420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 421 422else 423ifeq ($(config-targets),1) 424# =========================================================================== 425# *config targets only - make sure prerequisites are updated, and descend 426# in scripts/kconfig to make the *config target 427 428# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 429# KBUILD_DEFCONFIG may point out an alternative default configuration 430# used for 'make defconfig' 431include $(srctree)/arch/$(SRCARCH)/Makefile 432export KBUILD_DEFCONFIG 433 434config %config: scripts_basic outputmakefile FORCE 435 $(Q)mkdir -p include/linux include/config 436 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 437 438else 439# =========================================================================== 440# Build targets only - this includes vmlinux, arch specific targets, clean 441# targets and others. In general all targets except *config targets. 442 443ifeq ($(KBUILD_EXTMOD),) 444# Additional helpers built in scripts/ 445# Carefully list dependencies so we do not try to build scripts twice 446# in parallel 447PHONY += scripts 448scripts: scripts_basic include/config/auto.conf 449 $(Q)$(MAKE) $(build)=$(@) 450 451# Objects we will link into vmlinux / subdirs we need to visit 452init-y := init/ 453drivers-y := drivers/ sound/ firmware/ 454net-y := net/ 455libs-y := lib/ 456core-y := usr/ 457endif # KBUILD_EXTMOD 458 459ifeq ($(dot-config),1) 460# Read in config 461-include include/config/auto.conf 462 463ifeq ($(KBUILD_EXTMOD),) 464# Read in dependencies to all Kconfig* files, make sure to run 465# oldconfig if changes are detected. 466-include include/config/auto.conf.cmd 467 468# To avoid any implicit rule to kick in, define an empty command 469$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 470 471# If .config is newer than include/config/auto.conf, someone tinkered 472# with it and forgot to run make oldconfig. 473# if auto.conf.cmd is missing then we are probably in a cleaned tree so 474# we execute the config step to be sure to catch updated Kconfig files 475include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 476 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 477else 478# external modules needs include/linux/autoconf.h and include/config/auto.conf 479# but do not care if they are up-to-date. Use auto.conf to trigger the test 480PHONY += include/config/auto.conf 481 482include/config/auto.conf: 483 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 484 echo; \ 485 echo " ERROR: Kernel configuration is invalid."; \ 486 echo " include/linux/autoconf.h or $@ are missing."; \ 487 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 488 echo; \ 489 /bin/false) 490 491endif # KBUILD_EXTMOD 492 493else 494# Dummy target needed, because used as prerequisite 495include/config/auto.conf: ; 496endif # $(dot-config) 497 498# The all: target is the default when no target is given on the 499# command line. 500# This allow a user to issue only 'make' to build a kernel including modules 501# Defaults vmlinux but it is usually overridden in the arch makefile 502all: vmlinux 503 504ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 505KBUILD_CFLAGS += -Os 506else 507KBUILD_CFLAGS += -O2 508endif 509 510include $(srctree)/arch/$(SRCARCH)/Makefile 511 512ifneq (CONFIG_FRAME_WARN,0) 513KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 514endif 515 516# Force gcc to behave correct even for buggy distributions 517# Arch Makefiles may override this setting 518KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 519 520ifdef CONFIG_FRAME_POINTER 521KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 522else 523KBUILD_CFLAGS += -fomit-frame-pointer 524endif 525 526ifdef CONFIG_DEBUG_INFO 527KBUILD_CFLAGS += -g 528KBUILD_AFLAGS += -gdwarf-2 529endif 530 531ifdef CONFIG_FTRACE 532KBUILD_CFLAGS += -pg 533endif 534 535# We trigger additional mismatches with less inlining 536ifdef CONFIG_DEBUG_SECTION_MISMATCH 537KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 538endif 539 540# arch Makefile may override CC so keep this after arch Makefile is included 541NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 542CHECKFLAGS += $(NOSTDINC_FLAGS) 543 544# warn about C99 declaration after statement 545KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 546 547# disable pointer signed / unsigned warnings in gcc 4.0 548KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 549 550# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 551# But warn user when we do so 552warn-assign = \ 553$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 554 555ifneq ($(KCPPFLAGS),) 556 $(call warn-assign,CPPFLAGS) 557 KBUILD_CPPFLAGS += $(KCPPFLAGS) 558endif 559ifneq ($(KAFLAGS),) 560 $(call warn-assign,AFLAGS) 561 KBUILD_AFLAGS += $(KAFLAGS) 562endif 563ifneq ($(KCFLAGS),) 564 $(call warn-assign,CFLAGS) 565 KBUILD_CFLAGS += $(KCFLAGS) 566endif 567 568# Use --build-id when available. 569LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 570 $(call ld-option, -Wl$(comma)--build-id,)) 571LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 572LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 573 574# Default kernel image to build when no specific target is given. 575# KBUILD_IMAGE may be overruled on the command line or 576# set in the environment 577# Also any assignments in arch/$(ARCH)/Makefile take precedence over 578# this default value 579export KBUILD_IMAGE ?= vmlinux 580 581# 582# INSTALL_PATH specifies where to place the updated kernel and system map 583# images. Default is /boot, but you can set it to other values 584export INSTALL_PATH ?= /boot 585 586# 587# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 588# relocations required by build roots. This is not defined in the 589# makefile but the argument can be passed to make if needed. 590# 591 592MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 593export MODLIB 594 595# 596# INSTALL_MOD_STRIP, if defined, will cause modules to be 597# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 598# the default option --strip-debug will be used. Otherwise, 599# INSTALL_MOD_STRIP will used as the options to the strip command. 600 601ifdef INSTALL_MOD_STRIP 602ifeq ($(INSTALL_MOD_STRIP),1) 603mod_strip_cmd = $(STRIP) --strip-debug 604else 605mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 606endif # INSTALL_MOD_STRIP=1 607else 608mod_strip_cmd = true 609endif # INSTALL_MOD_STRIP 610export mod_strip_cmd 611 612 613ifeq ($(KBUILD_EXTMOD),) 614core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 615 616vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 617 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 618 $(net-y) $(net-m) $(libs-y) $(libs-m))) 619 620vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 621 $(init-n) $(init-) \ 622 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 623 $(net-n) $(net-) $(libs-n) $(libs-)))) 624 625init-y := $(patsubst %/, %/built-in.o, $(init-y)) 626core-y := $(patsubst %/, %/built-in.o, $(core-y)) 627drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 628net-y := $(patsubst %/, %/built-in.o, $(net-y)) 629libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 630libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 631libs-y := $(libs-y1) $(libs-y2) 632 633# Build vmlinux 634# --------------------------------------------------------------------------- 635# vmlinux is built from the objects selected by $(vmlinux-init) and 636# $(vmlinux-main). Most are built-in.o files from top-level directories 637# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 638# Ordering when linking is important, and $(vmlinux-init) must be first. 639# 640# vmlinux 641# ^ 642# | 643# +-< $(vmlinux-init) 644# | +--< init/version.o + more 645# | 646# +--< $(vmlinux-main) 647# | +--< driver/built-in.o mm/built-in.o + more 648# | 649# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 650# 651# vmlinux version (uname -v) cannot be updated during normal 652# descending-into-subdirs phase since we do not yet know if we need to 653# update vmlinux. 654# Therefore this step is delayed until just before final link of vmlinux - 655# except in the kallsyms case where it is done just before adding the 656# symbols to the kernel. 657# 658# System.map is generated to document addresses of all kernel symbols 659 660vmlinux-init := $(head-y) $(init-y) 661vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 662vmlinux-all := $(vmlinux-init) $(vmlinux-main) 663vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 664export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 665 666# Rule to link vmlinux - also used during CONFIG_KALLSYMS 667# May be overridden by arch/$(ARCH)/Makefile 668quiet_cmd_vmlinux__ ?= LD $@ 669 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 670 -T $(vmlinux-lds) $(vmlinux-init) \ 671 --start-group $(vmlinux-main) --end-group \ 672 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 673 674# Generate new vmlinux version 675quiet_cmd_vmlinux_version = GEN .version 676 cmd_vmlinux_version = set -e; \ 677 if [ ! -r .version ]; then \ 678 rm -f .version; \ 679 echo 1 >.version; \ 680 else \ 681 mv .version .old_version; \ 682 expr 0$$(cat .old_version) + 1 >.version; \ 683 fi; \ 684 $(MAKE) $(build)=init 685 686# Generate System.map 687quiet_cmd_sysmap = SYSMAP 688 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 689 690# Link of vmlinux 691# If CONFIG_KALLSYMS is set .version is already updated 692# Generate System.map and verify that the content is consistent 693# Use + in front of the vmlinux_version rule to silent warning with make -j2 694# First command is ':' to allow us to use + in front of the rule 695define rule_vmlinux__ 696 : 697 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 698 699 $(call cmd,vmlinux__) 700 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 701 702 $(Q)$(if $($(quiet)cmd_sysmap), \ 703 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 704 $(cmd_sysmap) $@ System.map; \ 705 if [ $$? -ne 0 ]; then \ 706 rm -f $@; \ 707 /bin/false; \ 708 fi; 709 $(verify_kallsyms) 710endef 711 712 713ifdef CONFIG_KALLSYMS 714# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 715# It's a three stage process: 716# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 717# empty 718# Running kallsyms on that gives us .tmp_kallsyms1.o with 719# the right size - vmlinux version (uname -v) is updated during this step 720# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 721# but due to the added section, some addresses have shifted. 722# From here, we generate a correct .tmp_kallsyms2.o 723# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 724# o Verify that the System.map from vmlinux matches the map from 725# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 726# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 727# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 728# temporary bypass to allow the kernel to be built while the 729# maintainers work out what went wrong with kallsyms. 730 731ifdef CONFIG_KALLSYMS_EXTRA_PASS 732last_kallsyms := 3 733else 734last_kallsyms := 2 735endif 736 737kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 738 739define verify_kallsyms 740 $(Q)$(if $($(quiet)cmd_sysmap), \ 741 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 742 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 743 $(Q)cmp -s System.map .tmp_System.map || \ 744 (echo Inconsistent kallsyms data; \ 745 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 746 rm .tmp_kallsyms* ; /bin/false ) 747endef 748 749# Update vmlinux version before link 750# Use + in front of this rule to silent warning about make -j1 751# First command is ':' to allow us to use + in front of this rule 752cmd_ksym_ld = $(cmd_vmlinux__) 753define rule_ksym_ld 754 : 755 +$(call cmd,vmlinux_version) 756 $(call cmd,vmlinux__) 757 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 758endef 759 760# Generate .S file with all kernel symbols 761quiet_cmd_kallsyms = KSYM $@ 762 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 763 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 764 765.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 766 $(call if_changed_dep,as_o_S) 767 768.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 769 $(call cmd,kallsyms) 770 771# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 772.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 773 $(call if_changed_rule,ksym_ld) 774 775.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 776 $(call if_changed,vmlinux__) 777 778.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 779 $(call if_changed,vmlinux__) 780 781# Needs to visit scripts/ before $(KALLSYMS) can be used. 782$(KALLSYMS): scripts ; 783 784# Generate some data for debugging strange kallsyms problems 785debug_kallsyms: .tmp_map$(last_kallsyms) 786 787.tmp_map%: .tmp_vmlinux% FORCE 788 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 789 790.tmp_map3: .tmp_map2 791 792.tmp_map2: .tmp_map1 793 794endif # ifdef CONFIG_KALLSYMS 795 796# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 797# relevant sections renamed as per the linker script. 798quiet_cmd_vmlinux-modpost = LD $@ 799 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 800 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 801 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 802define rule_vmlinux-modpost 803 : 804 +$(call cmd,vmlinux-modpost) 805 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 806 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 807endef 808 809# vmlinux image - including updated kernel symbols 810vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 811ifdef CONFIG_HEADERS_CHECK 812 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 813endif 814ifdef CONFIG_SAMPLES 815 $(Q)$(MAKE) $(build)=samples 816endif 817 $(call vmlinux-modpost) 818 $(call if_changed_rule,vmlinux__) 819 $(Q)rm -f .old_version 820 821# build vmlinux.o first to catch section mismatch errors early 822ifdef CONFIG_KALLSYMS 823.tmp_vmlinux1: vmlinux.o 824endif 825 826modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 827vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 828 $(call if_changed_rule,vmlinux-modpost) 829 830# The actual objects are generated when descending, 831# make sure no implicit rule kicks in 832$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 833 834# Handle descending into subdirectories listed in $(vmlinux-dirs) 835# Preset locale variables to speed up the build process. Limit locale 836# tweaks to this spot to avoid wrong language settings when running 837# make menuconfig etc. 838# Error messages still appears in the original language 839 840PHONY += $(vmlinux-dirs) 841$(vmlinux-dirs): prepare scripts 842 $(Q)$(MAKE) $(build)=$@ 843 844# Build the kernel release string 845# 846# The KERNELRELEASE value built here is stored in the file 847# include/config/kernel.release, and is used when executing several 848# make targets, such as "make install" or "make modules_install." 849# 850# The eventual kernel release string consists of the following fields, 851# shown in a hierarchical format to show how smaller parts are concatenated 852# to form the larger and final value, with values coming from places like 853# the Makefile, kernel config options, make command line options and/or 854# SCM tag information. 855# 856# $(KERNELVERSION) 857# $(VERSION) eg, 2 858# $(PATCHLEVEL) eg, 6 859# $(SUBLEVEL) eg, 18 860# $(EXTRAVERSION) eg, -rc6 861# $(localver-full) 862# $(localver) 863# localversion* (files without backups, containing '~') 864# $(CONFIG_LOCALVERSION) (from kernel config setting) 865# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 866# ./scripts/setlocalversion (SCM tag, if one exists) 867# $(LOCALVERSION) (from make command line if provided) 868# 869# Note how the final $(localver-auto) string is included *only* if the 870# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 871# moment, only git is supported but other SCMs can edit the script 872# scripts/setlocalversion and add the appropriate checks as needed. 873 874pattern = ".*/localversion[^~]*" 875string = $(shell cat /dev/null \ 876 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 877 878localver = $(subst $(space),, $(string) \ 879 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 880 881# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 882# and if the SCM is know a tag from the SCM is appended. 883# The appended tag is determined by the SCM used. 884# 885# Currently, only git is supported. 886# Other SCMs can edit scripts/setlocalversion and add the appropriate 887# checks as needed. 888ifdef CONFIG_LOCALVERSION_AUTO 889 _localver-auto = $(shell $(CONFIG_SHELL) \ 890 $(srctree)/scripts/setlocalversion $(srctree)) 891 localver-auto = $(LOCALVERSION)$(_localver-auto) 892endif 893 894localver-full = $(localver)$(localver-auto) 895 896# Store (new) KERNELRELASE string in include/config/kernel.release 897kernelrelease = $(KERNELVERSION)$(localver-full) 898include/config/kernel.release: include/config/auto.conf FORCE 899 $(Q)rm -f $@ 900 $(Q)echo $(kernelrelease) > $@ 901 902 903# Things we need to do before we recursively start building the kernel 904# or the modules are listed in "prepare". 905# A multi level approach is used. prepareN is processed before prepareN-1. 906# archprepare is used in arch Makefiles and when processed asm symlink, 907# version.h and scripts_basic is processed / created. 908 909# Listed in dependency order 910PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 911 912# prepare3 is used to check if we are building in a separate output directory, 913# and if so do: 914# 1) Check that make has not been executed in the kernel src $(srctree) 915# 2) Create the include2 directory, used for the second asm symlink 916prepare3: include/config/kernel.release 917ifneq ($(KBUILD_SRC),) 918 @echo ' Using $(srctree) as source for kernel' 919 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 920 echo " $(srctree) is not clean, please run 'make mrproper'";\ 921 echo " in the '$(srctree)' directory.";\ 922 /bin/false; \ 923 fi; 924 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 925 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm 926endif 927 928# prepare2 creates a makefile if using a separate output directory 929prepare2: prepare3 outputmakefile 930 931prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 932 include/asm include/config/auto.conf 933 $(cmd_crmodverdir) 934 935archprepare: prepare1 scripts_basic 936 937prepare0: archprepare FORCE 938 $(Q)$(MAKE) $(build)=. 939 $(Q)$(MAKE) $(build)=. missing-syscalls 940 941# All the preparing.. 942prepare: prepare0 943 944# Leave this as default for preprocessing vmlinux.lds.S, which is now 945# done in arch/$(ARCH)/kernel/Makefile 946 947export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 948 949# The asm symlink changes when $(ARCH) changes. 950# Detect this and ask user to run make mrproper 951 952include/asm: FORCE 953 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 954 if [ -L include/asm ]; then \ 955 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 956 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 957 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 958 exit 1; \ 959 fi; \ 960 else \ 961 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 962 if [ ! -d include ]; then \ 963 mkdir -p include; \ 964 fi; \ 965 ln -fsn asm-$(SRCARCH) $@; \ 966 fi 967 968# Generate some files 969# --------------------------------------------------------------------------- 970 971# KERNELRELEASE can change from a few different places, meaning version.h 972# needs to be updated, so this check is forced on all builds 973 974uts_len := 64 975define filechk_utsrelease.h 976 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 977 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 978 exit 1; \ 979 fi; \ 980 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 981endef 982 983define filechk_version.h 984 (echo \#define LINUX_VERSION_CODE $(shell \ 985 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 986 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 987endef 988 989include/linux/version.h: $(srctree)/Makefile FORCE 990 $(call filechk,version.h) 991 992include/linux/utsrelease.h: include/config/kernel.release FORCE 993 $(call filechk,utsrelease.h) 994 995# --------------------------------------------------------------------------- 996 997PHONY += depend dep 998depend dep: 999 @echo '*** Warning: make $@ is unnecessary now.' 1000 1001# --------------------------------------------------------------------------- 1002# Firmware install 1003INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1004export INSTALL_FW_PATH 1005 1006PHONY += firmware_install 1007firmware_install: FORCE 1008 @mkdir -p $(objtree)/firmware 1009 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1010 1011# --------------------------------------------------------------------------- 1012# Kernel headers 1013INSTALL_HDR_PATH=$(objtree)/usr 1014export INSTALL_HDR_PATH 1015 1016HDRFILTER=generic i386 x86_64 1017HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 1018 1019PHONY += headers_install_all 1020headers_install_all: include/linux/version.h scripts_basic FORCE 1021 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1022 $(Q)for arch in $(HDRARCHES); do \ 1023 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 1024 done 1025 1026PHONY += headers_install 1027headers_install: include/linux/version.h scripts_basic FORCE 1028 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1029 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ 1030 exit 1 ; fi 1031 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1032 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include 1033 1034PHONY += headers_check_all 1035headers_check_all: headers_install_all 1036 $(Q)for arch in $(HDRARCHES); do \ 1037 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ 1038 done 1039 1040PHONY += headers_check 1041headers_check: headers_install 1042 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 1043 1044# --------------------------------------------------------------------------- 1045# Modules 1046 1047ifdef CONFIG_MODULES 1048 1049# By default, build modules as well 1050 1051all: modules 1052 1053# Build modules 1054# 1055# A module can be listed more than once in obj-m resulting in 1056# duplicate lines in modules.order files. Those are removed 1057# using awk while concatenating to the final file. 1058 1059PHONY += modules 1060modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1061 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1062 @echo ' Building modules, stage 2.'; 1063 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1064 1065 1066# Target to prepare building external modules 1067PHONY += modules_prepare 1068modules_prepare: prepare scripts 1069 1070# Target to install modules 1071PHONY += modules_install 1072modules_install: _modinst_ _modinst_post 1073 1074PHONY += _modinst_ 1075_modinst_: 1076 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1077 echo "Warning: you may need to install module-init-tools"; \ 1078 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1079 sleep 1; \ 1080 fi 1081 @rm -rf $(MODLIB)/kernel 1082 @rm -f $(MODLIB)/source 1083 @mkdir -p $(MODLIB)/kernel 1084 @ln -s $(srctree) $(MODLIB)/source 1085 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1086 rm -f $(MODLIB)/build ; \ 1087 ln -s $(objtree) $(MODLIB)/build ; \ 1088 fi 1089 @cp -f $(objtree)/modules.order $(MODLIB)/ 1090 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1091 1092# This depmod is only for convenience to give the initial 1093# boot a modules.dep even before / is mounted read-write. However the 1094# boot script depmod is the master version. 1095PHONY += _modinst_post 1096_modinst_post: _modinst_ 1097 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1098 $(call cmd,depmod) 1099 1100else # CONFIG_MODULES 1101 1102# Modules not configured 1103# --------------------------------------------------------------------------- 1104 1105modules modules_install: FORCE 1106 @echo 1107 @echo "The present kernel configuration has modules disabled." 1108 @echo "Type 'make config' and enable loadable module support." 1109 @echo "Then build a kernel with module support enabled." 1110 @echo 1111 @exit 1 1112 1113endif # CONFIG_MODULES 1114 1115### 1116# Cleaning is done on three levels. 1117# make clean Delete most generated files 1118# Leave enough to build external modules 1119# make mrproper Delete the current configuration, and all generated files 1120# make distclean Remove editor backup files, patch leftover files and the like 1121 1122# Directories & files removed with 'make clean' 1123CLEAN_DIRS += $(MODVERDIR) 1124CLEAN_FILES += vmlinux System.map \ 1125 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1126 1127# Directories & files removed with 'make mrproper' 1128MRPROPER_DIRS += include/config include2 usr/include 1129MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1130 include/linux/autoconf.h include/linux/version.h \ 1131 include/linux/utsrelease.h \ 1132 include/linux/bounds.h include/asm*/asm-offsets.h \ 1133 Module.symvers tags TAGS cscope* 1134 1135# clean - Delete most, but leave enough to build external modules 1136# 1137clean: rm-dirs := $(CLEAN_DIRS) 1138clean: rm-files := $(CLEAN_FILES) 1139clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1140 1141PHONY += $(clean-dirs) clean archclean 1142$(clean-dirs): 1143 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1144 1145clean: archclean $(clean-dirs) 1146 $(call cmd,rmdirs) 1147 $(call cmd,rmfiles) 1148 @find . $(RCS_FIND_IGNORE) \ 1149 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1150 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1151 -o -name '*.symtypes' -o -name 'modules.order' \) \ 1152 -type f -print | xargs rm -f 1153 1154# mrproper - Delete all generated files, including .config 1155# 1156mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1157mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1158mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1159 1160PHONY += $(mrproper-dirs) mrproper archmrproper 1161$(mrproper-dirs): 1162 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1163 1164mrproper: clean archmrproper $(mrproper-dirs) 1165 $(call cmd,rmdirs) 1166 $(call cmd,rmfiles) 1167 1168# distclean 1169# 1170PHONY += distclean 1171 1172distclean: mrproper 1173 @find $(srctree) $(RCS_FIND_IGNORE) \ 1174 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1175 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1176 -o -name '.*.rej' -o -size 0 \ 1177 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1178 -type f -print | xargs rm -f 1179 1180 1181# Packaging of the kernel to various formats 1182# --------------------------------------------------------------------------- 1183# rpm target kept for backward compatibility 1184package-dir := $(srctree)/scripts/package 1185 1186%pkg: include/config/kernel.release FORCE 1187 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1188rpm: include/config/kernel.release FORCE 1189 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1190 1191 1192# Brief documentation of the typical targets used 1193# --------------------------------------------------------------------------- 1194 1195boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1196boards := $(notdir $(boards)) 1197board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1198board-dirs := $(sort $(notdir $(board-dirs:/=))) 1199 1200help: 1201 @echo 'Cleaning targets:' 1202 @echo ' clean - Remove most generated files but keep the config and' 1203 @echo ' enough build support to build external modules' 1204 @echo ' mrproper - Remove all generated files + config + various backup files' 1205 @echo ' distclean - mrproper + remove editor backup and patch files' 1206 @echo '' 1207 @echo 'Configuration targets:' 1208 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1209 @echo '' 1210 @echo 'Other generic targets:' 1211 @echo ' all - Build all targets marked with [*]' 1212 @echo '* vmlinux - Build the bare kernel' 1213 @echo '* modules - Build all modules' 1214 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1215 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1216 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1217 @echo ' dir/ - Build all files in dir and below' 1218 @echo ' dir/file.[ois] - Build specified target only' 1219 @echo ' dir/file.ko - Build module including final link' 1220 @echo ' prepare - Set up for building external modules' 1221 @echo ' tags/TAGS - Generate tags file for editors' 1222 @echo ' cscope - Generate cscope index' 1223 @echo ' kernelrelease - Output the release version string' 1224 @echo ' kernelversion - Output the version stored in Makefile' 1225 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1226 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1227 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1228 fi 1229 @echo '' 1230 @echo 'Static analysers' 1231 @echo ' checkstack - Generate a list of stack hogs' 1232 @echo ' namespacecheck - Name space analysis on compiled kernel' 1233 @echo ' versioncheck - Sanity check on version.h usage' 1234 @echo ' includecheck - Check for duplicate included header files' 1235 @echo ' export_report - List the usages of all exported symbols' 1236 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1237 echo ' headers_check - Sanity check on exported headers'; \ 1238 fi 1239 @echo '' 1240 @echo 'Kernel packaging:' 1241 @$(MAKE) $(build)=$(package-dir) help 1242 @echo '' 1243 @echo 'Documentation targets:' 1244 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1245 @echo '' 1246 @echo 'Architecture specific targets ($(SRCARCH)):' 1247 @$(if $(archhelp),$(archhelp),\ 1248 echo ' No architecture specific help defined for $(SRCARCH)') 1249 @echo '' 1250 @$(if $(boards), \ 1251 $(foreach b, $(boards), \ 1252 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1253 echo '') 1254 @$(if $(board-dirs), \ 1255 $(foreach b, $(board-dirs), \ 1256 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1257 printf " %-16s - Show all of the above\\n" help-boards; \ 1258 echo '') 1259 1260 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1261 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1262 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1263 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1264 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1265 @echo '' 1266 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1267 @echo 'For further info see the ./README file' 1268 1269 1270help-board-dirs := $(addprefix help-,$(board-dirs)) 1271 1272help-boards: $(help-board-dirs) 1273 1274boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1275 1276$(help-board-dirs): help-%: 1277 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1278 @$(if $(boards-per-dir), \ 1279 $(foreach b, $(boards-per-dir), \ 1280 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1281 echo '') 1282 1283 1284# Documentation targets 1285# --------------------------------------------------------------------------- 1286%docs: scripts_basic FORCE 1287 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1288 1289else # KBUILD_EXTMOD 1290 1291### 1292# External module support. 1293# When building external modules the kernel used as basis is considered 1294# read-only, and no consistency checks are made and the make 1295# system is not used on the basis kernel. If updates are required 1296# in the basis kernel ordinary make commands (without M=...) must 1297# be used. 1298# 1299# The following are the only valid targets when building external 1300# modules. 1301# make M=dir clean Delete all automatically generated files 1302# make M=dir modules Make all modules in specified dir 1303# make M=dir Same as 'make M=dir modules' 1304# make M=dir modules_install 1305# Install the modules built in the module directory 1306# Assumes install directory is already created 1307 1308# We are always building modules 1309KBUILD_MODULES := 1 1310PHONY += crmodverdir 1311crmodverdir: 1312 $(cmd_crmodverdir) 1313 1314PHONY += $(objtree)/Module.symvers 1315$(objtree)/Module.symvers: 1316 @test -e $(objtree)/Module.symvers || ( \ 1317 echo; \ 1318 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1319 echo " is missing; modules will have no dependencies and modversions."; \ 1320 echo ) 1321 1322module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1323PHONY += $(module-dirs) modules 1324$(module-dirs): crmodverdir $(objtree)/Module.symvers 1325 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1326 1327modules: $(module-dirs) 1328 @echo ' Building modules, stage 2.'; 1329 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1330 1331PHONY += modules_install 1332modules_install: _emodinst_ _emodinst_post 1333 1334install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1335PHONY += _emodinst_ 1336_emodinst_: 1337 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1338 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1339 1340PHONY += _emodinst_post 1341_emodinst_post: _emodinst_ 1342 $(call cmd,depmod) 1343 1344clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1345 1346PHONY += $(clean-dirs) clean 1347$(clean-dirs): 1348 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1349 1350clean: rm-dirs := $(MODVERDIR) 1351clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1352clean: $(clean-dirs) 1353 $(call cmd,rmdirs) 1354 $(call cmd,rmfiles) 1355 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1356 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1357 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1358 -type f -print | xargs rm -f 1359 1360help: 1361 @echo ' Building external modules.' 1362 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1363 @echo '' 1364 @echo ' modules - default target, build the module(s)' 1365 @echo ' modules_install - install the module' 1366 @echo ' clean - remove generated files in module directory only' 1367 @echo '' 1368 1369# Dummies... 1370PHONY += prepare scripts 1371prepare: ; 1372scripts: ; 1373endif # KBUILD_EXTMOD 1374 1375# Generate tags for editors 1376# --------------------------------------------------------------------------- 1377 1378#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1379#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1380#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1381 1382ifeq ($(src),$(obj)) 1383__srctree = 1384else 1385__srctree = $(srctree)/ 1386endif 1387 1388ifeq ($(ALLSOURCE_ARCHS),) 1389ifeq ($(ARCH),um) 1390ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1391else 1392ALLINCLUDE_ARCHS := $(SRCARCH) 1393endif 1394else 1395#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1396ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1397endif 1398 1399ALLSOURCE_ARCHS := $(SRCARCH) 1400 1401define find-sources 1402 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1403 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1404 -name $1 -print; \ 1405 done ; \ 1406 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1407 -name $1 -print; \ 1408 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1409 \( -name config -o -name 'asm-*' \) -prune \ 1410 -o -name $1 -print; \ 1411 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1412 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1413 -name $1 -print; \ 1414 done ; \ 1415 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1416 -name $1 -print; \ 1417 find $(__srctree) $(RCS_FIND_IGNORE) \ 1418 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1419 -name $1 -print; \ 1420 ) 1421endef 1422 1423define all-sources 1424 $(call find-sources,'*.[chS]') 1425endef 1426define all-kconfigs 1427 $(call find-sources,'Kconfig*') 1428endef 1429define all-defconfigs 1430 $(call find-sources,'defconfig') 1431endef 1432 1433define xtags 1434 if $1 --version 2>&1 | grep -iq exuberant; then \ 1435 $(all-sources) | xargs $1 -a \ 1436 -I __initdata,__exitdata,__acquires,__releases \ 1437 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1438 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1439 --extra=+f --c-kinds=+px \ 1440 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1441 $(all-kconfigs) | xargs $1 -a \ 1442 --langdef=kconfig \ 1443 --language-force=kconfig \ 1444 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1445 $(all-defconfigs) | xargs -r $1 -a \ 1446 --langdef=dotconfig \ 1447 --language-force=dotconfig \ 1448 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1449 elif $1 --version 2>&1 | grep -iq emacs; then \ 1450 $(all-sources) | xargs $1 -a; \ 1451 $(all-kconfigs) | xargs $1 -a \ 1452 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1453 $(all-defconfigs) | xargs -r $1 -a \ 1454 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1455 else \ 1456 $(all-sources) | xargs $1 -a; \ 1457 fi 1458endef 1459 1460quiet_cmd_cscope-file = FILELST cscope.files 1461 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1462 1463quiet_cmd_cscope = MAKE cscope.out 1464 cmd_cscope = cscope -b 1465 1466cscope: FORCE 1467 $(call cmd,cscope-file) 1468 $(call cmd,cscope) 1469 1470quiet_cmd_TAGS = MAKE $@ 1471define cmd_TAGS 1472 rm -f $@; \ 1473 $(call xtags,etags) 1474endef 1475 1476TAGS: FORCE 1477 $(call cmd,TAGS) 1478 1479quiet_cmd_tags = MAKE $@ 1480define cmd_tags 1481 rm -f $@; \ 1482 $(call xtags,ctags) 1483endef 1484 1485tags: FORCE 1486 $(call cmd,tags) 1487 1488 1489# Scripts to check various things for consistency 1490# --------------------------------------------------------------------------- 1491 1492includecheck: 1493 find * $(RCS_FIND_IGNORE) \ 1494 -name '*.[hcS]' -type f -print | sort \ 1495 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1496 1497versioncheck: 1498 find * $(RCS_FIND_IGNORE) \ 1499 -name '*.[hcS]' -type f -print | sort \ 1500 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1501 1502namespacecheck: 1503 $(PERL) $(srctree)/scripts/namespace.pl 1504 1505export_report: 1506 $(PERL) $(srctree)/scripts/export_report.pl 1507 1508endif #ifeq ($(config-targets),1) 1509endif #ifeq ($(mixed-targets),1) 1510 1511PHONY += checkstack kernelrelease kernelversion 1512 1513# UML needs a little special treatment here. It wants to use the host 1514# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1515# else wants $(ARCH), including people doing cross-builds, which means 1516# that $(SUBARCH) doesn't work here. 1517ifeq ($(ARCH), um) 1518CHECKSTACK_ARCH := $(SUBARCH) 1519else 1520CHECKSTACK_ARCH := $(ARCH) 1521endif 1522checkstack: 1523 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1524 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1525 1526kernelrelease: 1527 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1528 $(error kernelrelease not valid - run 'make prepare' to update it)) 1529kernelversion: 1530 @echo $(KERNELVERSION) 1531 1532# Single targets 1533# --------------------------------------------------------------------------- 1534# Single targets are compatible with: 1535# - build with mixed source and output 1536# - build with separate output dir 'make O=...' 1537# - external modules 1538# 1539# target-dir => where to store outputfile 1540# build-dir => directory in kernel source tree to use 1541 1542ifeq ($(KBUILD_EXTMOD),) 1543 build-dir = $(patsubst %/,%,$(dir $@)) 1544 target-dir = $(dir $@) 1545else 1546 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1547 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1548 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1549endif 1550 1551%.s: %.c prepare scripts FORCE 1552 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1553%.i: %.c prepare scripts FORCE 1554 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1555%.o: %.c prepare scripts FORCE 1556 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1557%.lst: %.c prepare scripts FORCE 1558 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1559%.s: %.S prepare scripts FORCE 1560 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1561%.o: %.S prepare scripts FORCE 1562 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1563%.symtypes: %.c prepare scripts FORCE 1564 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1565 1566# Modules 1567/ %/: prepare scripts FORCE 1568 $(cmd_crmodverdir) 1569 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1570 $(build)=$(build-dir) 1571%.ko: prepare scripts FORCE 1572 $(cmd_crmodverdir) 1573 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1574 $(build)=$(build-dir) $(@:.ko=.o) 1575 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1576 1577# FIXME Should go into a make.lib or something 1578# =========================================================================== 1579 1580quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1581 cmd_rmdirs = rm -rf $(rm-dirs) 1582 1583quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1584 cmd_rmfiles = rm -f $(rm-files) 1585 1586# Run depmod only if we have System.map and depmod is executable 1587quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1588 cmd_depmod = \ 1589 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1590 $(DEPMOD) -ae -F System.map \ 1591 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1592 $(KERNELRELEASE); \ 1593 fi 1594 1595# Create temporary dir for module support files 1596# clean it up only when building all modules 1597cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1598 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1599 1600a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1601 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1602 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1603 1604quiet_cmd_as_o_S = AS $@ 1605cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1606 1607# read all saved command lines 1608 1609targets := $(wildcard $(sort $(targets))) 1610cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1611 1612ifneq ($(cmd_files),) 1613 $(cmd_files): ; # Do not try to update included dependency files 1614 include $(cmd_files) 1615endif 1616 1617# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1618# Usage: 1619# $(Q)$(MAKE) $(clean)=dir 1620clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1621 1622endif # skip-makefile 1623 1624PHONY += FORCE 1625FORCE: 1626 1627# Declare the contents of the .PHONY variable as phony. We keep that 1628# information in a variable se we can use it in if_changed and friends. 1629.PHONY: $(PHONY) 1630