1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 9 4EXTRAVERSION = 5NAME=Zonked Quokka 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 print "Entering directory ..." 14MAKEFLAGS += --no-print-directory 15 16# We are using a recursive build, so we need to do a little thinking 17# to get the ordering right. 18# 19# Most importantly: sub-Makefiles should only ever modify files in 20# their own directory. If in some directory we have a dependency on 21# a file in another dir (which doesn't happen often, but it's of 22# unavoidable when linking the built-in.o targets which finally 23# turn into vmlinux), we will call a sub make in that other dir, and 24# after that we are sure that everything which is in that other dir 25# is now up to date. 26# 27# The only cases where we need to modify files which have global 28# effects are thus separated out and done before the recursive 29# descending is started. They are now explicitly listed as the 30# prepare rule. 31 32# To put more focus on warnings, be less verbose as default 33# Use 'make V=1' to see the full commands 34 35ifdef V 36 ifeq ("$(origin V)", "command line") 37 KBUILD_VERBOSE = $(V) 38 endif 39endif 40ifndef KBUILD_VERBOSE 41 KBUILD_VERBOSE = 0 42endif 43 44# Call sparse as part of compilation of C files 45# Use 'make C=1' to enable sparse checking 46 47ifdef C 48 ifeq ("$(origin C)", "command line") 49 KBUILD_CHECKSRC = $(C) 50 endif 51endif 52ifndef KBUILD_CHECKSRC 53 KBUILD_CHECKSRC = 0 54endif 55 56# Use make M=dir to specify directory of external module to build 57# Old syntax make ... SUBDIRS=$PWD is still supported 58# Setting the environment variable KBUILD_EXTMOD take precedence 59ifdef SUBDIRS 60 KBUILD_EXTMOD ?= $(SUBDIRS) 61endif 62ifdef M 63 ifeq ("$(origin M)", "command line") 64 KBUILD_EXTMOD := $(M) 65 endif 66endif 67 68 69# kbuild supports saving output files in a separate directory. 70# To locate output files in a separate directory two syntax'es are supported. 71# In both cases the working directory must be the root of the kernel src. 72# 1) O= 73# Use "make O=dir/to/store/output/files/" 74# 75# 2) Set KBUILD_OUTPUT 76# Set the environment variable KBUILD_OUTPUT to point to the directory 77# where the output files shall be placed. 78# export KBUILD_OUTPUT=dir/to/store/output/files/ 79# make 80# 81# The O= assigment takes precedence over the KBUILD_OUTPUT environment variable. 82 83 84# KBUILD_SRC is set on invocation of make in OBJ directory 85# KBUILD_SRC is not intended to be used by the regular user (for now) 86ifeq ($(KBUILD_SRC),) 87 88# OK, Make called in directory where kernel src resides 89# Do we want to locate output files in a separate directory? 90ifdef O 91 ifeq ("$(origin O)", "command line") 92 KBUILD_OUTPUT := $(O) 93 endif 94endif 95 96# That's our default target when none is given on the command line 97.PHONY: _all 98_all: 99 100ifneq ($(KBUILD_OUTPUT),) 101# Invoke a second make in the output directory, passing relevant variables 102# check that the output directory actually exists 103saved-output := $(KBUILD_OUTPUT) 104KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 105$(if $(KBUILD_OUTPUT),, \ 106 $(error output directory "$(saved-output)" does not exist)) 107 108.PHONY: $(MAKECMDGOALS) 109 110$(filter-out _all,$(MAKECMDGOALS)) _all: 111 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 112 KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ 113 KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \ 114 -f $(CURDIR)/Makefile $@ 115 116# Leave processing to above invocation of make 117skip-makefile := 1 118endif # ifneq ($(KBUILD_OUTPUT),) 119endif # ifeq ($(KBUILD_SRC),) 120 121# We process the rest of the Makefile if this is the final invocation of make 122ifeq ($(skip-makefile),) 123 124# If building an external module we do not care about the all: rule 125# but instead _all depend on modules 126.PHONY: all 127ifeq ($(KBUILD_EXTMOD),) 128_all: all 129else 130_all: modules 131endif 132 133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 134TOPDIR := $(srctree) 135# FIXME - TOPDIR is obsolete, use srctree/objtree 136objtree := $(CURDIR) 137src := $(srctree) 138obj := $(objtree) 139 140VPATH := $(srctree) 141 142export srctree objtree VPATH TOPDIR 143 144nullstring := 145space := $(nullstring) # end of line 146 147# Take the contents of any files called localversion* and the config 148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be 149# careful not to include files twice if building in the source 150# directory. LOCALVERSION from the command line override all of this 151 152ifeq ($(objtree),$(srctree)) 153localversion-files := $(wildcard $(srctree)/localversion*) 154else 155localversion-files := $(wildcard $(objtree)/localversion* $(srctree)/localversion*) 156endif 157 158LOCALVERSION = $(subst $(space),, \ 159 $(shell cat /dev/null $(localversion-files)) \ 160 $(subst ",,$(CONFIG_LOCALVERSION))) 161 162KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) 163 164# SUBARCH tells the usermode build what the underlying arch is. That is set 165# first, and if a usermode build is happening, the "ARCH=um" on the command 166# line overrides the setting of ARCH below. If a native build is happening, 167# then ARCH is assigned, getting whatever value it gets normally, and 168# SUBARCH is subsequently ignored. 169 170SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 171 -e s/arm.*/arm/ -e s/sa110/arm/ \ 172 -e s/s390x/s390/ -e s/parisc64/parisc/ ) 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 192 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198 199# SHELL used by kbuild 200CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 201 else if [ -x /bin/bash ]; then echo /bin/bash; \ 202 else echo sh; fi ; fi) 203 204HOSTCC = gcc 205HOSTCXX = g++ 206HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 207HOSTCXXFLAGS = -O2 208 209# Decide whether to build built-in, modular, or both. 210# Normally, just do built-in. 211 212KBUILD_MODULES := 213KBUILD_BUILTIN := 1 214 215# If we have only "make modules", don't compile built-in objects. 216# When we're building modules with modversions, we need to consider 217# the built-in objects during the descend as well, in order to 218# make sure the checksums are uptodate before we record them. 219 220ifeq ($(MAKECMDGOALS),modules) 221 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 222endif 223 224# If we have "make <whatever> modules", compile modules 225# in addition to whatever we do anyway. 226# Just "make" or "make all" shall build modules as well 227 228ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 229 KBUILD_MODULES := 1 230endif 231 232ifeq ($(MAKECMDGOALS),) 233 KBUILD_MODULES := 1 234endif 235 236export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE 237export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 238 239# Beautify output 240# --------------------------------------------------------------------------- 241# 242# Normally, we echo the whole command before executing it. By making 243# that echo $($(quiet)$(cmd)), we now have the possibility to set 244# $(quiet) to choose other forms of output instead, e.g. 245# 246# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 247# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 248# 249# If $(quiet) is empty, the whole command will be printed. 250# If it is set to "quiet_", only the short version will be printed. 251# If it is set to "silent_", nothing wil be printed at all, since 252# the variable $(silent_cmd_cc_o_c) doesn't exist. 253# 254# A simple variant is to prefix commands with $(Q) - that's usefull 255# for commands that shall be hidden in non-verbose mode. 256# 257# $(Q)ln $@ :< 258# 259# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 260# If KBUILD_VERBOSE equals 1 then the above command is displayed. 261 262ifeq ($(KBUILD_VERBOSE),1) 263 quiet = 264 Q = 265else 266 quiet=quiet_ 267 Q = @ 268endif 269 270# If the user is running make -s (silent mode), suppress echoing of 271# commands 272 273ifneq ($(findstring s,$(MAKEFLAGS)),) 274 quiet=silent_ 275endif 276 277export quiet Q KBUILD_VERBOSE 278 279###### 280# cc support functions to be used (only) in arch/$(ARCH)/Makefile 281# See documentation in Documentation/kbuild/makefiles.txt 282 283# cc-option 284# Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586) 285 286cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 287 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 288 289# For backward compatibility 290check_gcc = $(warning check_gcc is deprecated - use cc-option) \ 291 $(call cc-option, $(1),$(2)) 292 293# cc-option-yn 294# Usage: flag := $(call gcc-option-yn, -march=winchip-c6) 295cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 296 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) 297 298# cc-version 299# Usage gcc-ver := $(call cc-version $(CC)) 300cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ 301 $(if $(1), $(1), $(CC))) 302 303 304# Look for make include files relative to root of kernel src 305MAKEFLAGS += --include-dir=$(srctree) 306 307# For maximum performance (+ possibly random breakage, uncomment 308# the following) 309 310#MAKEFLAGS += -rR 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 325DEPMOD = /sbin/depmod 326KALLSYMS = scripts/kallsyms 327PERL = perl 328CHECK = sparse 329CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ 330MODFLAGS = -DMODULE 331CFLAGS_MODULE = $(MODFLAGS) 332AFLAGS_MODULE = $(MODFLAGS) 333LDFLAGS_MODULE = -r 334CFLAGS_KERNEL = 335AFLAGS_KERNEL = 336 337NOSTDINC_FLAGS = -nostdinc -iwithprefix include 338 339# Use LINUXINCLUDE when you must reference the include/ directory. 340# Needed to be compatible with the O= option 341LINUXINCLUDE := -Iinclude \ 342 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) 343 344CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 345 346CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ 347 -fno-strict-aliasing -fno-common 348AFLAGS := -D__ASSEMBLY__ 349 350export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ 351 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 352 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 353 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 354 355export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 356export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 357export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 358 359# When compiling out-of-tree modules, put MODVERDIR in the module 360# tree rather than in the kernel tree. The kernel tree might 361# even be read-only. 362export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 363 364# The temporary file to save gcc -MD generated dependencies must not 365# contain a comma 366comma := , 367depfile = $(subst $(comma),_,$(@D)/.$(@F).d) 368 369# Files to ignore in find ... statements 370 371RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o 372RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc 373 374# =========================================================================== 375# Rules shared between *config targets and build targets 376 377# Basic helpers built in scripts/ 378.PHONY: scripts_basic 379scripts_basic: 380 $(Q)$(MAKE) $(build)=scripts/basic 381 382# To make sure we do not include .config for any of the *config targets 383# catch them early, and hand them over to scripts/kconfig/Makefile 384# It is allowed to specify more targets when calling make, including 385# mixing *config targets and build targets. 386# For example 'make oldconfig all'. 387# Detect when mixed targets is specified, and make a second invocation 388# of make so .config is not included in this case either (for *config). 389 390no-dot-config-targets := clean mrproper distclean \ 391 cscope TAGS tags help %docs check% 392 393config-targets := 0 394mixed-targets := 0 395dot-config := 1 396 397ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 398 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 399 dot-config := 0 400 endif 401endif 402 403ifeq ($(KBUILD_EXTMOD),) 404 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 405 config-targets := 1 406 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 407 mixed-targets := 1 408 endif 409 endif 410endif 411 412ifeq ($(mixed-targets),1) 413# =========================================================================== 414# We're called with mixed targets (*config and build targets). 415# Handle them one by one. 416 417%:: FORCE 418 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 419 420else 421ifeq ($(config-targets),1) 422# =========================================================================== 423# *config targets only - make sure prerequisites are updated, and descend 424# in scripts/kconfig to make the *config target 425 426config: scripts_basic FORCE 427 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 428%config: scripts_basic FORCE 429 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 430 431else 432# =========================================================================== 433# Build targets only - this includes vmlinux, arch specific targets, clean 434# targets and others. In general all targets except *config targets. 435 436ifeq ($(KBUILD_EXTMOD),) 437# Additional helpers built in scripts/ 438# Carefully list dependencies so we do not try to build scripts twice 439# in parrallel 440.PHONY: scripts 441scripts: scripts_basic include/config/MARKER 442 $(Q)$(MAKE) $(build)=$(@) 443 444scripts_basic: include/linux/autoconf.h 445 446# Objects we will link into vmlinux / subdirs we need to visit 447init-y := init/ 448drivers-y := drivers/ sound/ 449net-y := net/ 450libs-y := lib/ 451core-y := usr/ 452endif # KBUILD_EXTMOD 453 454ifeq ($(dot-config),1) 455# In this section, we need .config 456 457# Read in dependencies to all Kconfig* files, make sure to run 458# oldconfig if changes are detected. 459-include .config.cmd 460 461include .config 462 463# If .config needs to be updated, it will be done via the dependency 464# that autoconf has on .config. 465# To avoid any implicit rule to kick in, define an empty command 466.config: ; 467 468# If .config is newer than include/linux/autoconf.h, someone tinkered 469# with it and forgot to run make oldconfig 470include/linux/autoconf.h: .config 471 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 472else 473# Dummy target needed, because used as prerequisite 474include/linux/autoconf.h: ; 475endif 476 477# The all: target is the default when no target is given on the 478# command line. 479# This allow a user to issue only 'make' to build a kernel including modules 480# Defaults vmlinux but it is usually overriden in the arch makefile 481all: vmlinux 482 483ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 484CFLAGS += -Os 485else 486CFLAGS += -O2 487endif 488 489ifndef CONFIG_FRAME_POINTER 490CFLAGS += -fomit-frame-pointer 491endif 492 493ifdef CONFIG_DEBUG_INFO 494CFLAGS += -g 495endif 496 497# warn about C99 declaration after statement 498CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 499 500include $(srctree)/arch/$(ARCH)/Makefile 501 502# Default kernel image to build when no specific target is given. 503# KBUILD_IMAGE may be overruled on the commandline or 504# set in the environment 505# Also any assingments in arch/$(ARCH)/Makefiel take precedence over 506# this default value 507export KBUILD_IMAGE ?= vmlinux 508 509# 510# INSTALL_PATH specifies where to place the updated kernel and system map 511# images. Uncomment if you want to place them anywhere other than root. 512# 513 514#export INSTALL_PATH=/boot 515 516# 517# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 518# relocations required by build roots. This is not defined in the 519# makefile but the arguement can be passed to make if needed. 520# 521 522MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 523export MODLIB 524 525 526ifeq ($(KBUILD_EXTMOD),) 527core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ 528 529vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 530 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 531 $(net-y) $(net-m) $(libs-y) $(libs-m))) 532 533vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 534 $(init-n) $(init-) \ 535 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 536 $(net-n) $(net-) $(libs-n) $(libs-)))) 537 538init-y := $(patsubst %/, %/built-in.o, $(init-y)) 539core-y := $(patsubst %/, %/built-in.o, $(core-y)) 540drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 541net-y := $(patsubst %/, %/built-in.o, $(net-y)) 542libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 543libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 544libs-y := $(libs-y1) $(libs-y2) 545 546# Build vmlinux 547# --------------------------------------------------------------------------- 548# vmlinux is build from the objects selected by $(vmlinux-init) and 549# $(vmlinux-main). Most are built-in.o files from top-level directories 550# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 551# Ordering when linking is important, and $(vmlinux-init) must be first. 552# 553# vmlinux 554# ^ 555# | 556# +-< $(vmlinux-init) 557# | +--< init/version.o + more 558# | 559# +--< $(vmlinux-main) 560# | +--< driver/built-in.o mm/built-in.o + more 561# | 562# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 563# 564# vmlinux version (uname -v) cannot be updated during normal 565# descending-into-subdirs phase since we do not yet know if we need to 566# update vmlinux. 567# Therefore this step is delayed until just before final link of vmlinux - 568# except in the kallsyms case where it is done just before adding the 569# symbols to the kernel. 570# 571# System.map is generated to document addresses of all kernel symbols 572 573vmlinux-init := $(head-y) $(init-y) 574vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 575vmlinux-all := $(vmlinux-init) $(vmlinux-main) 576vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 577 578# Rule to link vmlinux - also used during CONFIG_KALLSYMS 579# May be overridden by arch/$(ARCH)/Makefile 580quiet_cmd_vmlinux__ ?= LD $@ 581 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 582 -T $(vmlinux-lds) $(vmlinux-init) \ 583 --start-group $(vmlinux-main) --end-group \ 584 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 585 586# Generate new vmlinux version 587quiet_cmd_vmlinux_version = GEN .version 588 cmd_vmlinux_version = set -e; \ 589 . $(srctree)/scripts/mkversion > .tmp_version; \ 590 mv -f .tmp_version .version; \ 591 $(MAKE) $(build)=init 592 593# Generate System.map 594quiet_cmd_sysmap = SYSMAP 595 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 596 597# Link of vmlinux 598# If CONFIG_KALLSYMS is set .version is already updated 599# Generate System.map and verify that the content is consistent 600 601define rule_vmlinux__ 602 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 603 604 $(call cmd,vmlinux__) 605 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 606 607 $(Q)$(if $($(quiet)cmd_sysmap), \ 608 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 609 $(cmd_sysmap) $@ System.map; \ 610 if [ $$? -ne 0 ]; then \ 611 rm -f $@; \ 612 /bin/false; \ 613 fi; 614 $(verify_kallsyms) 615endef 616 617 618ifdef CONFIG_KALLSYMS 619# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 620# It's a three stage process: 621# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 622# empty 623# Running kallsyms on that gives us .tmp_kallsyms1.o with 624# the right size - vmlinux version (uname -v) is updated during this step 625# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 626# but due to the added section, some addresses have shifted. 627# From here, we generate a correct .tmp_kallsyms2.o 628# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 629# o Verify that the System.map from vmlinux matches the map from 630# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 631# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 632# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 633# temporary bypass to allow the kernel to be built while the 634# maintainers work out what went wrong with kallsyms. 635 636ifdef CONFIG_KALLSYMS_EXTRA_PASS 637last_kallsyms := 3 638else 639last_kallsyms := 2 640endif 641 642kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 643 644define verify_kallsyms 645 $(Q)$(if $($(quiet)cmd_sysmap), \ 646 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 647 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 648 $(Q)cmp -s System.map .tmp_System.map || \ 649 (echo Inconsistent kallsyms data; \ 650 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 651 rm .tmp_kallsyms* ; /bin/false ) 652endef 653 654# Update vmlinux version before link 655# Use + in front of this rule to silent warning about make -j1 656cmd_ksym_ld = $(cmd_vmlinux__) 657define rule_ksym_ld 658 +$(call cmd,vmlinux_version) 659 $(call cmd,vmlinux__) 660 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 661endef 662 663# Generate .S file with all kernel symbols 664quiet_cmd_kallsyms = KSYM $@ 665 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 666 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 667 668.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 669 $(call if_changed_dep,as_o_S) 670 671.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 672 $(call cmd,kallsyms) 673 674# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 675.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 676 $(call if_changed_rule,ksym_ld) 677 678.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 679 $(call if_changed,vmlinux__) 680 681.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 682 $(call if_changed,vmlinux__) 683 684# Needs to visit scripts/ before $(KALLSYMS) can be used. 685$(KALLSYMS): scripts ; 686 687endif # ifdef CONFIG_KALLSYMS 688 689# vmlinux image - including updated kernel symbols 690vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 691 $(call if_changed_rule,vmlinux__) 692 693# The actual objects are generated when descending, 694# make sure no implicit rule kicks in 695$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 696 697# Handle descending into subdirectories listed in $(vmlinux-dirs) 698# Preset locale variables to speed up the build process. Limit locale 699# tweaks to this spot to avoid wrong language settings when running 700# make menuconfig etc. 701# Error messages still appears in the original language 702 703.PHONY: $(vmlinux-dirs) 704$(vmlinux-dirs): prepare-all scripts 705 $(Q)$(MAKE) $(build)=$@ 706 707# Things we need to do before we recursively start building the kernel 708# or the modules are listed in "prepare-all". 709# A multi level approach is used. prepare1 is updated first, then prepare0. 710# prepare-all is the collection point for the prepare targets. 711 712.PHONY: prepare-all prepare prepare0 prepare1 prepare2 713 714# prepare 2 generate Makefile to be placed in output directory, if 715# using a seperate output directory. This allows convinient use 716# of make in output directory 717prepare2: 718 $(Q)if /usr/bin/env test ! $(srctree) -ef $(objtree); then \ 719 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 720 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 721 > $(objtree)/Makefile; \ 722 fi 723 724# prepare1 is used to check if we are building in a separate output directory, 725# and if so do: 726# 1) Check that make has not been executed in the kernel src $(srctree) 727# 2) Create the include2 directory, used for the second asm symlink 728 729prepare1: prepare2 730ifneq ($(KBUILD_SRC),) 731 @echo ' Using $(srctree) as source for kernel' 732 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ 733 echo " $(srctree) is not clean, please run 'make mrproper'";\ 734 echo " in the '$(srctree)' directory.";\ 735 /bin/false; \ 736 fi; 737 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 738 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 739endif 740 741prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER 742ifneq ($(KBUILD_MODULES),) 743 $(Q)rm -rf $(MODVERDIR) 744 $(Q)mkdir -p $(MODVERDIR) 745endif 746 747# All the preparing.. 748prepare-all: prepare0 prepare 749 750# Leave this as default for preprocessing vmlinux.lds.S, which is now 751# done in arch/$(ARCH)/kernel/Makefile 752 753export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 754 755# Single targets 756# --------------------------------------------------------------------------- 757 758%.s: %.c scripts FORCE 759 $(Q)$(MAKE) $(build)=$(@D) $@ 760%.i: %.c scripts FORCE 761 $(Q)$(MAKE) $(build)=$(@D) $@ 762%.o: %.c scripts FORCE 763 $(Q)$(MAKE) $(build)=$(@D) $@ 764%/: scripts prepare FORCE 765 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) 766%.lst: %.c scripts FORCE 767 $(Q)$(MAKE) $(build)=$(@D) $@ 768%.s: %.S scripts FORCE 769 $(Q)$(MAKE) $(build)=$(@D) $@ 770%.o: %.S scripts FORCE 771 $(Q)$(MAKE) $(build)=$(@D) $@ 772 773# FIXME: The asm symlink changes when $(ARCH) changes. That's 774# hard to detect, but I suppose "make mrproper" is a good idea 775# before switching between archs anyway. 776 777include/asm: 778 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 779 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 780 @ln -fsn asm-$(ARCH) $@ 781 782# Split autoconf.h into include/linux/config/* 783 784include/config/MARKER: include/linux/autoconf.h 785 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 786 @scripts/basic/split-include include/linux/autoconf.h include/config 787 @touch $@ 788 789# Generate some files 790# --------------------------------------------------------------------------- 791 792# KERNELRELEASE can change from a few different places, meaning version.h 793# needs to be updated, so this check is forced on all builds 794 795uts_len := 64 796 797define filechk_version.h 798 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 799 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 800 exit 1; \ 801 fi; \ 802 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 803 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 804 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 805 ) 806endef 807 808include/linux/version.h: $(srctree)/Makefile FORCE 809 $(call filechk,version.h) 810 811# --------------------------------------------------------------------------- 812 813.PHONY: depend dep 814depend dep: 815 @echo '*** Warning: make $@ is unnecessary now.' 816 817# --------------------------------------------------------------------------- 818# Modules 819 820ifdef CONFIG_MODULES 821 822# By default, build modules as well 823 824all: modules 825 826# Build modules 827 828.PHONY: modules 829modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 830 @echo ' Building modules, stage 2.'; 831 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 832 833 834# Target to prepare building external modules 835.PHONY: modules_prepare 836modules_prepare: prepare-all scripts 837 838# Target to install modules 839.PHONY: modules_install 840modules_install: _modinst_ _modinst_post 841 842.PHONY: _modinst_ 843_modinst_: 844 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ 845 echo "Warning: you may need to install module-init-tools"; \ 846 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 847 sleep 1; \ 848 fi 849 @rm -rf $(MODLIB)/kernel 850 @rm -f $(MODLIB)/source 851 @mkdir -p $(MODLIB)/kernel 852 @ln -s $(srctree) $(MODLIB)/source 853 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 854 rm -f $(MODLIB)/build ; \ 855 ln -s $(objtree) $(MODLIB)/build ; \ 856 fi 857 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 858 859# If System.map exists, run depmod. This deliberately does not have a 860# dependency on System.map since that would run the dependency tree on 861# vmlinux. This depmod is only for convenience to give the initial 862# boot a modules.dep even before / is mounted read-write. However the 863# boot script depmod is the master version. 864ifeq "$(strip $(INSTALL_MOD_PATH))" "" 865depmod_opts := 866else 867depmod_opts := -b $(INSTALL_MOD_PATH) -r 868endif 869.PHONY: _modinst_post 870_modinst_post: _modinst_ 871 if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 872 873else # CONFIG_MODULES 874 875# Modules not configured 876# --------------------------------------------------------------------------- 877 878modules modules_install: FORCE 879 @echo 880 @echo "The present kernel configuration has modules disabled." 881 @echo "Type 'make config' and enable loadable module support." 882 @echo "Then build a kernel with module support enabled." 883 @echo 884 @exit 1 885 886endif # CONFIG_MODULES 887 888# Generate asm-offsets.h 889# --------------------------------------------------------------------------- 890 891define filechk_gen-asm-offsets 892 (set -e; \ 893 echo "#ifndef __ASM_OFFSETS_H__"; \ 894 echo "#define __ASM_OFFSETS_H__"; \ 895 echo "/*"; \ 896 echo " * DO NOT MODIFY."; \ 897 echo " *"; \ 898 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 899 echo " *"; \ 900 echo " */"; \ 901 echo ""; \ 902 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 903 echo ""; \ 904 echo "#endif" ) 905endef 906 907 908### 909# Cleaning is done on three levels. 910# make clean Delete most generated files 911# Leave enough to build external modules 912# make mrproper Delete the current configuration, and all generated files 913# make distclean Remove editor backup files, patch leftover files and the like 914 915# Directories & files removed with 'make clean' 916CLEAN_DIRS += $(MODVERDIR) 917CLEAN_FILES += vmlinux System.map \ 918 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 919 920# Directories & files removed with 'make mrproper' 921MRPROPER_DIRS += include/config include2 922MRPROPER_FILES += .config .config.old include/asm .version \ 923 include/linux/autoconf.h include/linux/version.h \ 924 Module.symvers tags TAGS cscope* 925 926# clean - Delete most, but leave enough to build external modules 927# 928clean: rm-dirs := $(CLEAN_DIRS) 929clean: rm-files := $(CLEAN_FILES) 930clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) 931 932.PHONY: $(clean-dirs) clean archclean 933$(clean-dirs): 934 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 935 936clean: archclean $(clean-dirs) 937 $(call cmd,rmdirs) 938 $(call cmd,rmfiles) 939 @find . $(RCS_FIND_IGNORE) \ 940 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 941 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 942 -type f -print | xargs rm -f 943 944# mrproper - Delete all generated files, including .config 945# 946mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 947mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 948mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 949 950.PHONY: $(mrproper-dirs) mrproper archmrproper 951$(mrproper-dirs): 952 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 953 954mrproper: clean archmrproper $(mrproper-dirs) 955 $(call cmd,rmdirs) 956 $(call cmd,rmfiles) 957 958# distclean 959# 960.PHONY: distclean 961 962distclean: mrproper 963 @find $(srctree) $(RCS_FIND_IGNORE) \ 964 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 965 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 966 -o -name '.*.rej' -o -size 0 \ 967 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 968 -type f -print | xargs rm -f 969 970 971# Packaging of the kernel to various formats 972# --------------------------------------------------------------------------- 973# rpm target kept for backward compatibility 974package-dir := $(srctree)/scripts/package 975 976.PHONY: %-pkg rpm 977 978%pkg: FORCE 979 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 980rpm: FORCE 981 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 982 983 984# Brief documentation of the typical targets used 985# --------------------------------------------------------------------------- 986 987boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 988boards := $(notdir $(boards)) 989 990help: 991 @echo 'Cleaning targets:' 992 @echo ' clean - remove most generated files but keep the config' 993 @echo ' mrproper - remove all generated files + config + various backup files' 994 @echo '' 995 @echo 'Configuration targets:' 996 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 997 @echo '' 998 @echo 'Other generic targets:' 999 @echo ' all - Build all targets marked with [*]' 1000 @echo '* vmlinux - Build the bare kernel'
1001 @echo '* modules - Build all modules' 1002 @echo ' modules_install - Install all modules' 1003 @echo ' dir/ - Build all files in dir and below' 1004 @echo ' dir/file.[ois] - Build specified target only' 1005 @echo ' rpm - Build a kernel as an RPM package' 1006 @echo ' tags/TAGS - Generate tags file for editors' 1007 @echo ' cscope - Generate cscope index' 1008 @echo '' 1009 @echo 'Static analysers' 1010 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1011 @echo ' and init sections from non-init sections' 1012 @echo ' checkstack - Generate a list of stack hogs' 1013 @echo ' namespacecheck - Name space analysis on compiled kernel' 1014 @echo '' 1015 @echo 'Kernel packaging:' 1016 @$(MAKE) -f $(package-dir)/Makefile help 1017 @echo '' 1018 @echo 'Documentation targets:' 1019 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1020 @echo '' 1021 @echo 'Architecture specific targets ($(ARCH)):' 1022 @$(if $(archhelp),$(archhelp),\ 1023 echo ' No architecture specific help defined for $(ARCH)') 1024 @echo '' 1025 @$(if $(boards), \ 1026 $(foreach b, $(boards), \ 1027 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1028 echo '') 1029 1030 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1031 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1032 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1033 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1034 @echo '' 1035 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1036 @echo 'For further info see the ./README file' 1037 1038 1039# Documentation targets 1040# --------------------------------------------------------------------------- 1041%docs: scripts_basic FORCE 1042 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1043 1044else # KBUILD_EXTMOD 1045 1046### 1047# External module support. 1048# When building external modules the kernel used as basis is considered 1049# read-only, and no consistency checks are made and the make 1050# system is not used on the basis kernel. If updates are required 1051# in the basis kernel ordinary make commands (without M=...) must 1052# be used. 1053# 1054# The following are the only valid targets when building external 1055# modules. 1056# make M=dir clean Delete all automatically generated files 1057# make M=dir modules Make all modules in specified dir 1058# make M=dir Same as 'make M=dir modules' 1059# make M=dir modules_install 1060# Install the modules build in the module directory 1061# Assumes install directory is already created 1062 1063# We are always building modules 1064KBUILD_MODULES := 1 1065.PHONY: crmodverdir 1066crmodverdir: 1067 $(Q)mkdir -p $(MODVERDIR) 1068 1069module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1070.PHONY: $(module-dirs) modules 1071$(module-dirs): crmodverdir 1072 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1073 1074modules: $(module-dirs) 1075 @echo ' Building modules, stage 2.'; 1076 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1077 1078.PHONY: modules_install 1079modules_install: 1080 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1081 1082clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1083 1084.PHONY: $(clean-dirs) clean 1085$(clean-dirs): 1086 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1087 1088clean: rm-dirs := $(MODVERDIR) 1089clean: $(clean-dirs) 1090 $(call cmd,rmdirs) 1091 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1092 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1093 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1094 -type f -print | xargs rm -f 1095 1096help: 1097 @echo ' Building external modules.' 1098 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1099 @echo '' 1100 @echo ' modules - default target, build the module(s)' 1101 @echo ' modules_install - install the module' 1102 @echo ' clean - remove generated files in module directory only' 1103 @echo '' 1104endif # KBUILD_EXTMOD 1105 1106# Generate tags for editors 1107# --------------------------------------------------------------------------- 1108 1109define all-sources 1110 ( find $(srctree) $(RCS_FIND_IGNORE) \ 1111 \( -name include -o -name arch \) -prune -o \ 1112 -name '*.[chS]' -print; \ 1113 find $(srctree)/arch/$(ARCH) $(RCS_FIND_IGNORE) \ 1114 -name '*.[chS]' -print; \ 1115 find $(srctree)/security/selinux/include $(RCS_FIND_IGNORE) \ 1116 -name '*.[chS]' -print; \ 1117 find $(srctree)/include $(RCS_FIND_IGNORE) \ 1118 \( -name config -o -name 'asm-*' \) -prune \ 1119 -o -name '*.[chS]' -print; \ 1120 find $(srctree)/include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ 1121 -name '*.[chS]' -print; \ 1122 find $(srctree)/include/asm-generic $(RCS_FIND_IGNORE) \ 1123 -name '*.[chS]' -print ) 1124endef 1125 1126quiet_cmd_cscope-file = FILELST cscope.files 1127 cmd_cscope-file = $(all-sources) > cscope.files 1128 1129quiet_cmd_cscope = MAKE cscope.out 1130 cmd_cscope = cscope -k -b -q 1131 1132cscope: FORCE 1133 $(call cmd,cscope-file) 1134 $(call cmd,cscope) 1135 1136quiet_cmd_TAGS = MAKE $@ 1137cmd_TAGS = $(all-sources) | etags - 1138 1139# Exuberant ctags works better with -I 1140 1141quiet_cmd_tags = MAKE $@ 1142define cmd_tags 1143 rm -f $@; \ 1144 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \ 1145 $(all-sources) | xargs ctags $$CTAGSF -a 1146endef 1147 1148TAGS: FORCE 1149 $(call cmd,TAGS) 1150 1151tags: FORCE 1152 $(call cmd,tags) 1153 1154 1155# Scripts to check various things for consistency 1156# --------------------------------------------------------------------------- 1157 1158configcheck: 1159 find * $(RCS_FIND_IGNORE) \ 1160 -name '*.[hcS]' -type f -print | sort \ 1161 | xargs $(PERL) -w scripts/checkconfig.pl 1162 1163includecheck: 1164 find * $(RCS_FIND_IGNORE) \ 1165 -name '*.[hcS]' -type f -print | sort \ 1166 | xargs $(PERL) -w scripts/checkincludes.pl 1167 1168versioncheck: 1169 find * $(RCS_FIND_IGNORE) \ 1170 -name '*.[hcS]' -type f -print | sort \ 1171 | xargs $(PERL) -w scripts/checkversion.pl 1172 1173buildcheck: 1174 $(PERL) $(srctree)/scripts/reference_discarded.pl 1175 $(PERL) $(srctree)/scripts/reference_init.pl 1176 1177namespacecheck: 1178 $(PERL) $(srctree)/scripts/namespace.pl 1179 1180endif #ifeq ($(config-targets),1) 1181endif #ifeq ($(mixed-targets),1) 1182 1183.PHONY: checkstack 1184checkstack: 1185 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1186 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1187 1188# FIXME Should go into a make.lib or something 1189# =========================================================================== 1190 1191quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1192 cmd_rmdirs = rm -rf $(rm-dirs) 1193 1194quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1195 cmd_rmfiles = rm -f $(rm-files) 1196 1197 1198a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1199 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1200 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1201 1202quiet_cmd_as_o_S = AS $@ 1203cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1204 1205# read all saved command lines 1206 1207targets := $(wildcard $(sort $(targets))) 1208cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1209 1210ifneq ($(cmd_files),) 1211 $(cmd_files): ; # Do not try to update included dependency files 1212 include $(cmd_files) 1213endif 1214 1215# Execute command and generate cmd file 1216if_changed = $(if $(strip $? \ 1217 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1218 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1219 @set -e; \ 1220 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1221 $(cmd_$(1)); \ 1222 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) 1223 1224 1225# execute the command and also postprocess generated .d dependencies 1226# file 1227if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ 1228 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1229 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1230 $(Q)set -e; \ 1231 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1232 $(cmd_$(1)); \ 1233 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ 1234 rm -f $(depfile); \ 1235 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) 1236 1237# Usage: $(call if_changed_rule,foo) 1238# will check if $(cmd_foo) changed, or any of the prequisites changed, 1239# and if so will execute $(rule_foo) 1240 1241if_changed_rule = $(if $(strip $? \ 1242 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ 1243 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ 1244 $(Q)$(rule_$(1))) 1245 1246# If quiet is set, only print short version of command 1247 1248cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) 1249 1250# filechk is used to check if the content of a generated file is updated. 1251# Sample usage: 1252# define filechk_sample 1253# echo $KERNELRELEASE 1254# endef 1255# version.h : Makefile 1256# $(call filechk,sample) 1257# The rule defined shall write to stdout the content of the new file. 1258# The existing file will be compared with the new one. 1259# - If no file exist it is created 1260# - If the content differ the new file is used 1261# - If they are equal no change, and no timestamp update 1262 1263define filechk 1264 @set -e; \ 1265 echo ' CHK $@'; \ 1266 mkdir -p $(dir $@); \ 1267 $(filechk_$(1)) < $< > $@.tmp; \ 1268 if [ -r $@ ] && cmp -s $@ $@.tmp; then \ 1269 rm -f $@.tmp; \ 1270 else \ 1271 echo ' UPD $@'; \ 1272 mv -f $@.tmp $@; \ 1273 fi 1274endef 1275 1276# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir 1277# Usage: 1278# $(Q)$(MAKE) $(build)=dir 1279build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj 1280 1281# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1282# Usage: 1283# $(Q)$(MAKE) $(clean)=dir 1284clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1285 1286# $(call descend,<dir>,<target>) 1287# Recursively call a sub-make in <dir> with target <target> 1288# Usage is deprecated, because make does not see this as an invocation of make. 1289descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) 1290 1291endif # skip-makefile 1292 1293FORCE: 1294