diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 1343 |
1 files changed, 1343 insertions, 0 deletions
diff --git a/Makefile b/Makefile new file mode 100644 index 00000000000..8e5f9bbdf4d --- /dev/null +++ b/Makefile @@ -0,0 +1,1343 @@ +VERSION = 2 +PATCHLEVEL = 6 +SUBLEVEL = 12 +EXTRAVERSION =-rc2 +NAME=Woozy Numbat + +# *DOCUMENTATION* +# To see a list of typical targets execute "make help" +# More info can be located in ./README +# Comments in this file are targeted only to the developer, do not +# expect to learn how to build the kernel reading this file. + +# Do not print "Entering directory ..." +MAKEFLAGS += --no-print-directory + +# We are using a recursive build, so we need to do a little thinking +# to get the ordering right. +# +# Most importantly: sub-Makefiles should only ever modify files in +# their own directory. If in some directory we have a dependency on +# a file in another dir (which doesn't happen often, but it's often +# unavoidable when linking the built-in.o targets which finally +# turn into vmlinux), we will call a sub make in that other dir, and +# after that we are sure that everything which is in that other dir +# is now up to date. +# +# The only cases where we need to modify files which have global +# effects are thus separated out and done before the recursive +# descending is started. They are now explicitly listed as the +# prepare rule. + +# To put more focus on warnings, be less verbose as default +# Use 'make V=1' to see the full commands + +ifdef V + ifeq ("$(origin V)", "command line") + KBUILD_VERBOSE = $(V) + endif +endif +ifndef KBUILD_VERBOSE + KBUILD_VERBOSE = 0 +endif + +# Call sparse as part of compilation of C files +# Use 'make C=1' to enable sparse checking + +ifdef C + ifeq ("$(origin C)", "command line") + KBUILD_CHECKSRC = $(C) + endif +endif +ifndef KBUILD_CHECKSRC + KBUILD_CHECKSRC = 0 +endif + +# Use make M=dir to specify directory of external module to build +# Old syntax make ... SUBDIRS=$PWD is still supported +# Setting the environment variable KBUILD_EXTMOD take precedence +ifdef SUBDIRS + KBUILD_EXTMOD ?= $(SUBDIRS) +endif +ifdef M + ifeq ("$(origin M)", "command line") + KBUILD_EXTMOD := $(M) + endif +endif + + +# kbuild supports saving output files in a separate directory. +# To locate output files in a separate directory two syntaxes are supported. +# In both cases the working directory must be the root of the kernel src. +# 1) O= +# Use "make O=dir/to/store/output/files/" +# +# 2) Set KBUILD_OUTPUT +# Set the environment variable KBUILD_OUTPUT to point to the directory +# where the output files shall be placed. +# export KBUILD_OUTPUT=dir/to/store/output/files/ +# make +# +# The O= assignment takes precedence over the KBUILD_OUTPUT environment +# variable. + + +# KBUILD_SRC is set on invocation of make in OBJ directory +# KBUILD_SRC is not intended to be used by the regular user (for now) +ifeq ($(KBUILD_SRC),) + +# OK, Make called in directory where kernel src resides +# Do we want to locate output files in a separate directory? +ifdef O + ifeq ("$(origin O)", "command line") + KBUILD_OUTPUT := $(O) + endif +endif + +# That's our default target when none is given on the command line +.PHONY: _all +_all: + +ifneq ($(KBUILD_OUTPUT),) +# Invoke a second make in the output directory, passing relevant variables +# check that the output directory actually exists +saved-output := $(KBUILD_OUTPUT) +KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) +$(if $(KBUILD_OUTPUT),, \ + $(error output directory "$(saved-output)" does not exist)) + +.PHONY: $(MAKECMDGOALS) + +$(filter-out _all,$(MAKECMDGOALS)) _all: + $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ + KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ + KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \ + -f $(CURDIR)/Makefile $@ + +# Leave processing to above invocation of make +skip-makefile := 1 +endif # ifneq ($(KBUILD_OUTPUT),) +endif # ifeq ($(KBUILD_SRC),) + +# We process the rest of the Makefile if this is the final invocation of make +ifeq ($(skip-makefile),) + +# If building an external module we do not care about the all: rule +# but instead _all depend on modules +.PHONY: all +ifeq ($(KBUILD_EXTMOD),) +_all: all +else +_all: modules +endif + +srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) +TOPDIR := $(srctree) +# FIXME - TOPDIR is obsolete, use srctree/objtree +objtree := $(CURDIR) +src := $(srctree) +obj := $(objtree) + +VPATH := $(srctree) + +export srctree objtree VPATH TOPDIR + +nullstring := +space := $(nullstring) # end of line + +# Take the contents of any files called localversion* and the config +# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be +# careful not to include files twice if building in the source +# directory. LOCALVERSION from the command line override all of this + +localver := $(objtree)/localversion* $(srctree)/localversion* +localver := $(sort $(wildcard $(localver))) +# skip backup files (containing '~') +localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f))) + +LOCALVERSION = $(subst $(space),, \ + $(shell cat /dev/null $(localver)) \ + $(patsubst "%",%,$(CONFIG_LOCALVERSION))) + +KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) + +# SUBARCH tells the usermode build what the underlying arch is. That is set +# first, and if a usermode build is happening, the "ARCH=um" on the command +# line overrides the setting of ARCH below. If a native build is happening, +# then ARCH is assigned, getting whatever value it gets normally, and +# SUBARCH is subsequently ignored. + +SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ + -e s/arm.*/arm/ -e s/sa110/arm/ \ + -e s/s390x/s390/ -e s/parisc64/parisc/ ) + +# Cross compiling and selecting different set of gcc/bin-utils +# --------------------------------------------------------------------------- +# +# When performing cross compilation for other architectures ARCH shall be set +# to the target architecture. (See arch/* for the possibilities). +# ARCH can be set during invocation of make: +# make ARCH=ia64 +# Another way is to have ARCH set in the environment. +# The default ARCH is the host where make is executed. + +# CROSS_COMPILE specify the prefix used for all executables used +# during compilation. Only gcc and related bin-utils executables +# are prefixed with $(CROSS_COMPILE). +# CROSS_COMPILE can be set on the command line +# make CROSS_COMPILE=ia64-linux- +# Alternatively CROSS_COMPILE can be set in the environment. +# Default value for CROSS_COMPILE is not to prefix executables +# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile + +ARCH ?= $(SUBARCH) +CROSS_COMPILE ?= + +# Architecture as present in compile.h +UTS_MACHINE := $(ARCH) + +# SHELL used by kbuild +CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ + else if [ -x /bin/bash ]; then echo /bin/bash; \ + else echo sh; fi ; fi) + +HOSTCC = gcc +HOSTCXX = g++ +HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer +HOSTCXXFLAGS = -O2 + +# Decide whether to build built-in, modular, or both. +# Normally, just do built-in. + +KBUILD_MODULES := +KBUILD_BUILTIN := 1 + +# If we have only "make modules", don't compile built-in objects. +# When we're building modules with modversions, we need to consider +# the built-in objects during the descend as well, in order to +# make sure the checksums are uptodate before we record them. + +ifeq ($(MAKECMDGOALS),modules) + KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) +endif + +# If we have "make <whatever> modules", compile modules +# in addition to whatever we do anyway. +# Just "make" or "make all" shall build modules as well + +ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) + KBUILD_MODULES := 1 +endif + +ifeq ($(MAKECMDGOALS),) + KBUILD_MODULES := 1 +endif + +export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE +export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD + +# Beautify output +# --------------------------------------------------------------------------- +# +# Normally, we echo the whole command before executing it. By making +# that echo $($(quiet)$(cmd)), we now have the possibility to set +# $(quiet) to choose other forms of output instead, e.g. +# +# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ +# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< +# +# If $(quiet) is empty, the whole command will be printed. +# If it is set to "quiet_", only the short version will be printed. +# If it is set to "silent_", nothing wil be printed at all, since +# the variable $(silent_cmd_cc_o_c) doesn't exist. +# +# A simple variant is to prefix commands with $(Q) - that's usefull +# for commands that shall be hidden in non-verbose mode. +# +# $(Q)ln $@ :< +# +# If KBUILD_VERBOSE equals 0 then the above command will be hidden. +# If KBUILD_VERBOSE equals 1 then the above command is displayed. + +ifeq ($(KBUILD_VERBOSE),1) + quiet = + Q = +else + quiet=quiet_ + Q = @ +endif + +# If the user is running make -s (silent mode), suppress echoing of +# commands + +ifneq ($(findstring s,$(MAKEFLAGS)),) + quiet=silent_ +endif + +export quiet Q KBUILD_VERBOSE + +###### +# cc support functions to be used (only) in arch/$(ARCH)/Makefile +# See documentation in Documentation/kbuild/makefiles.txt + +# cc-option +# Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586) + +cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) + +# For backward compatibility +check_gcc = $(warning check_gcc is deprecated - use cc-option) \ + $(call cc-option, $(1),$(2)) + +# cc-option-yn +# Usage: flag := $(call cc-option-yn, -march=winchip-c6) +cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) + +# cc-option-align +# Prefix align with either -falign or -malign +cc-option-align = $(subst -functions=0,,\ + $(call cc-option,-falign-functions=0,-malign-functions=0)) + +# cc-version +# Usage gcc-ver := $(call cc-version $(CC)) +cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ + $(if $(1), $(1), $(CC))) + + +# Look for make include files relative to root of kernel src +MAKEFLAGS += --include-dir=$(srctree) + +# For maximum performance (+ possibly random breakage, uncomment +# the following) + +#MAKEFLAGS += -rR + +# Make variables (CC, etc...) + +AS = $(CROSS_COMPILE)as +LD = $(CROSS_COMPILE)ld +CC = $(CROSS_COMPILE)gcc +CPP = $(CC) -E +AR = $(CROSS_COMPILE)ar +NM = $(CROSS_COMPILE)nm +STRIP = $(CROSS_COMPILE)strip +OBJCOPY = $(CROSS_COMPILE)objcopy +OBJDUMP = $(CROSS_COMPILE)objdump +AWK = awk +GENKSYMS = scripts/genksyms/genksyms +DEPMOD = /sbin/depmod +KALLSYMS = scripts/kallsyms +PERL = perl +CHECK = sparse + +NOSTDINC_FLAGS = -nostdinc -isystem $(shell $(CC) -print-file-name=include) +CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ +CHECKFLAGS += $(NOSTDINC_FLAGS) +MODFLAGS = -DMODULE +CFLAGS_MODULE = $(MODFLAGS) +AFLAGS_MODULE = $(MODFLAGS) +LDFLAGS_MODULE = -r +CFLAGS_KERNEL = +AFLAGS_KERNEL = + + +# Use LINUXINCLUDE when you must reference the include/ directory. +# Needed to be compatible with the O= option +LINUXINCLUDE := -Iinclude \ + $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) + +CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) + +CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ + -fno-strict-aliasing -fno-common \ + -ffreestanding +AFLAGS := -D__ASSEMBLY__ + +export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ + ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ + CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ + HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS + +export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS +export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE +export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE + +# When compiling out-of-tree modules, put MODVERDIR in the module +# tree rather than in the kernel tree. The kernel tree might +# even be read-only. +export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions + +# The temporary file to save gcc -MD generated dependencies must not +# contain a comma +comma := , +depfile = $(subst $(comma),_,$(@D)/.$(@F).d) + +# Files to ignore in find ... statements + +RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o +RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc + +# =========================================================================== +# Rules shared between *config targets and build targets + +# Basic helpers built in scripts/ +.PHONY: scripts_basic +scripts_basic: + $(Q)$(MAKE) $(build)=scripts/basic + +.PHONY: outputmakefile +# outputmakefile generate a Makefile to be placed in output directory, if +# using a seperate output directory. This allows convinient use +# of make in output directory +outputmakefile: + $(Q)if test ! $(srctree) -ef $(objtree); then \ + $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ + $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ + > $(objtree)/Makefile; \ + echo ' GEN $(objtree)/Makefile'; \ + fi + +# To make sure we do not include .config for any of the *config targets +# catch them early, and hand them over to scripts/kconfig/Makefile +# It is allowed to specify more targets when calling make, including +# mixing *config targets and build targets. +# For example 'make oldconfig all'. +# Detect when mixed targets is specified, and make a second invocation +# of make so .config is not included in this case either (for *config). + +no-dot-config-targets := clean mrproper distclean \ + cscope TAGS tags help %docs check% + +config-targets := 0 +mixed-targets := 0 +dot-config := 1 + +ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) + ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) + dot-config := 0 + endif +endif + +ifeq ($(KBUILD_EXTMOD),) + ifneq ($(filter config %config,$(MAKECMDGOALS)),) + config-targets := 1 + ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) + mixed-targets := 1 + endif + endif +endif + +ifeq ($(mixed-targets),1) +# =========================================================================== +# We're called with mixed targets (*config and build targets). +# Handle them one by one. + +%:: FORCE + $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ + +else +ifeq ($(config-targets),1) +# =========================================================================== +# *config targets only - make sure prerequisites are updated, and descend +# in scripts/kconfig to make the *config target + +# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. +# KBUILD_DEFCONFIG may point out an alternative default configuration +# used for 'make defconfig' +include $(srctree)/arch/$(ARCH)/Makefile +export KBUILD_DEFCONFIG + +config: scripts_basic outputmakefile FORCE + $(Q)$(MAKE) $(build)=scripts/kconfig $@ +%config: scripts_basic outputmakefile FORCE + $(Q)$(MAKE) $(build)=scripts/kconfig $@ + +else +# =========================================================================== +# Build targets only - this includes vmlinux, arch specific targets, clean +# targets and others. In general all targets except *config targets. + +ifeq ($(KBUILD_EXTMOD),) +# Additional helpers built in scripts/ +# Carefully list dependencies so we do not try to build scripts twice +# in parrallel +.PHONY: scripts +scripts: scripts_basic include/config/MARKER + $(Q)$(MAKE) $(build)=$(@) + +scripts_basic: include/linux/autoconf.h + +# Objects we will link into vmlinux / subdirs we need to visit +init-y := init/ +drivers-y := drivers/ sound/ +net-y := net/ +libs-y := lib/ +core-y := usr/ +endif # KBUILD_EXTMOD + +ifeq ($(dot-config),1) +# In this section, we need .config + +# Read in dependencies to all Kconfig* files, make sure to run +# oldconfig if changes are detected. +-include .config.cmd + +include .config + +# If .config needs to be updated, it will be done via the dependency +# that autoconf has on .config. +# To avoid any implicit rule to kick in, define an empty command +.config: ; + +# If .config is newer than include/linux/autoconf.h, someone tinkered +# with it and forgot to run make oldconfig +include/linux/autoconf.h: .config + $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig +else +# Dummy target needed, because used as prerequisite +include/linux/autoconf.h: ; +endif + +# The all: target is the default when no target is given on the +# command line. +# This allow a user to issue only 'make' to build a kernel including modules +# Defaults vmlinux but it is usually overriden in the arch makefile +all: vmlinux + +ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +CFLAGS += -Os +else +CFLAGS += -O2 +endif + +#Add align options if CONFIG_CC_* is not equal to 0 +add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) +CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) +CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) +CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) +CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) + +ifdef CONFIG_FRAME_POINTER +CFLAGS += -fno-omit-frame-pointer +else +CFLAGS += -fomit-frame-pointer +endif + +ifdef CONFIG_DEBUG_INFO +CFLAGS += -g +endif + +include $(srctree)/arch/$(ARCH)/Makefile + +# warn about C99 declaration after statement +CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) + +# disable pointer signedness warnings in gcc 4.0 +CFLAGS += $(call cc-option,-Wno-pointer-sign,) + +# Default kernel image to build when no specific target is given. +# KBUILD_IMAGE may be overruled on the commandline or +# set in the environment +# Also any assignments in arch/$(ARCH)/Makefile take precedence over +# this default value +export KBUILD_IMAGE ?= vmlinux + +# +# INSTALL_PATH specifies where to place the updated kernel and system map +# images. Default is /boot, but you can set it to other values +export INSTALL_PATH ?= /boot + +# +# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory +# relocations required by build roots. This is not defined in the +# makefile but the arguement can be passed to make if needed. +# + +MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) +export MODLIB + + +ifeq ($(KBUILD_EXTMOD),) +core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ + +vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ + $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ + $(net-y) $(net-m) $(libs-y) $(libs-m))) + +vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ + $(init-n) $(init-) \ + $(core-n) $(core-) $(drivers-n) $(drivers-) \ + $(net-n) $(net-) $(libs-n) $(libs-)))) + +init-y := $(patsubst %/, %/built-in.o, $(init-y)) +core-y := $(patsubst %/, %/built-in.o, $(core-y)) +drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) +net-y := $(patsubst %/, %/built-in.o, $(net-y)) +libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) +libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) +libs-y := $(libs-y1) $(libs-y2) + +# Build vmlinux +# --------------------------------------------------------------------------- +# vmlinux is build from the objects selected by $(vmlinux-init) and +# $(vmlinux-main). Most are built-in.o files from top-level directories +# in the kernel tree, others are specified in arch/$(ARCH)Makefile. +# Ordering when linking is important, and $(vmlinux-init) must be first. +# +# vmlinux +# ^ +# | +# +-< $(vmlinux-init) +# | +--< init/version.o + more +# | +# +--< $(vmlinux-main) +# | +--< driver/built-in.o mm/built-in.o + more +# | +# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) +# +# vmlinux version (uname -v) cannot be updated during normal +# descending-into-subdirs phase since we do not yet know if we need to +# update vmlinux. +# Therefore this step is delayed until just before final link of vmlinux - +# except in the kallsyms case where it is done just before adding the +# symbols to the kernel. +# +# System.map is generated to document addresses of all kernel symbols + +vmlinux-init := $(head-y) $(init-y) +vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) +vmlinux-all := $(vmlinux-init) $(vmlinux-main) +vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds + +# Rule to link vmlinux - also used during CONFIG_KALLSYMS +# May be overridden by arch/$(ARCH)/Makefile +quiet_cmd_vmlinux__ ?= LD $@ + cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ + -T $(vmlinux-lds) $(vmlinux-init) \ + --start-group $(vmlinux-main) --end-group \ + $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) + +# Generate new vmlinux version +quiet_cmd_vmlinux_version = GEN .version + cmd_vmlinux_version = set -e; \ + . $(srctree)/scripts/mkversion > .tmp_version; \ + mv -f .tmp_version .version; \ + $(MAKE) $(build)=init + +# Generate System.map +quiet_cmd_sysmap = SYSMAP + cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap + +# Link of vmlinux +# If CONFIG_KALLSYMS is set .version is already updated +# Generate System.map and verify that the content is consistent + +define rule_vmlinux__ + $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) + + $(call cmd,vmlinux__) + $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd + + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) System.map' &&) \ + $(cmd_sysmap) $@ System.map; \ + if [ $$? -ne 0 ]; then \ + rm -f $@; \ + /bin/false; \ + fi; + $(verify_kallsyms) +endef + + +ifdef CONFIG_KALLSYMS +# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) +# It's a three stage process: +# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is +# empty +# Running kallsyms on that gives us .tmp_kallsyms1.o with +# the right size - vmlinux version (uname -v) is updated during this step +# o .tmp_vmlinux2 now has a __kallsyms section of the right size, +# but due to the added section, some addresses have shifted. +# From here, we generate a correct .tmp_kallsyms2.o +# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. +# o Verify that the System.map from vmlinux matches the map from +# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. +# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using +# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a +# temporary bypass to allow the kernel to be built while the +# maintainers work out what went wrong with kallsyms. + +ifdef CONFIG_KALLSYMS_EXTRA_PASS +last_kallsyms := 3 +else +last_kallsyms := 2 +endif + +kallsyms.o := .tmp_kallsyms$(last_kallsyms).o + +define verify_kallsyms + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ + $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map + $(Q)cmp -s System.map .tmp_System.map || \ + (echo Inconsistent kallsyms data; \ + echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ + rm .tmp_kallsyms* ; /bin/false ) +endef + +# Update vmlinux version before link +# Use + in front of this rule to silent warning about make -j1 +cmd_ksym_ld = $(cmd_vmlinux__) +define rule_ksym_ld + +$(call cmd,vmlinux_version) + $(call cmd,vmlinux__) + $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd +endef + +# Generate .S file with all kernel symbols +quiet_cmd_kallsyms = KSYM $@ + cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ + $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ + +.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE + $(call if_changed_dep,as_o_S) + +.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) + $(call cmd,kallsyms) + +# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version +.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE + $(call if_changed_rule,ksym_ld) + +.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE + $(call if_changed,vmlinux__) + +.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE + $(call if_changed,vmlinux__) + +# Needs to visit scripts/ before $(KALLSYMS) can be used. +$(KALLSYMS): scripts ; + +endif # ifdef CONFIG_KALLSYMS + +# vmlinux image - including updated kernel symbols +vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE + $(call if_changed_rule,vmlinux__) + +# The actual objects are generated when descending, +# make sure no implicit rule kicks in +$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; + +# Handle descending into subdirectories listed in $(vmlinux-dirs) +# Preset locale variables to speed up the build process. Limit locale +# tweaks to this spot to avoid wrong language settings when running +# make menuconfig etc. +# Error messages still appears in the original language + +.PHONY: $(vmlinux-dirs) +$(vmlinux-dirs): prepare-all scripts + $(Q)$(MAKE) $(build)=$@ + +# Things we need to do before we recursively start building the kernel +# or the modules are listed in "prepare-all". +# A multi level approach is used. prepare1 is updated first, then prepare0. +# prepare-all is the collection point for the prepare targets. + +.PHONY: prepare-all prepare prepare0 prepare1 prepare2 + +# prepare2 is used to check if we are building in a separate output directory, +# and if so do: +# 1) Check that make has not been executed in the kernel src $(srctree) +# 2) Create the include2 directory, used for the second asm symlink + +prepare2: +ifneq ($(KBUILD_SRC),) + @echo ' Using $(srctree) as source for kernel' + $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ + echo " $(srctree) is not clean, please run 'make mrproper'";\ + echo " in the '$(srctree)' directory.";\ + /bin/false; \ + fi; + $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; + $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm +endif + +# prepare1 creates a makefile if using a separate output directory +prepare1: prepare2 outputmakefile + +prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER +ifneq ($(KBUILD_MODULES),) + $(Q)rm -rf $(MODVERDIR) + $(Q)mkdir -p $(MODVERDIR) +endif + +# All the preparing.. +prepare-all: prepare0 prepare + +# Leave this as default for preprocessing vmlinux.lds.S, which is now +# done in arch/$(ARCH)/kernel/Makefile + +export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) + +# Single targets +# --------------------------------------------------------------------------- + +%.s: %.c scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ +%.i: %.c scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ +%.o: %.c scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ +%/: scripts prepare FORCE + $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) +%.lst: %.c scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ +%.s: %.S scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ +%.o: %.S scripts FORCE + $(Q)$(MAKE) $(build)=$(@D) $@ + +# FIXME: The asm symlink changes when $(ARCH) changes. That's +# hard to detect, but I suppose "make mrproper" is a good idea +# before switching between archs anyway. + +include/asm: + @echo ' SYMLINK $@ -> include/asm-$(ARCH)' + $(Q)if [ ! -d include ]; then mkdir -p include; fi; + @ln -fsn asm-$(ARCH) $@ + +# Split autoconf.h into include/linux/config/* + +include/config/MARKER: include/linux/autoconf.h + @echo ' SPLIT include/linux/autoconf.h -> include/config/*' + @scripts/basic/split-include include/linux/autoconf.h include/config + @touch $@ + +# Generate some files +# --------------------------------------------------------------------------- + +# KERNELRELEASE can change from a few different places, meaning version.h +# needs to be updated, so this check is forced on all builds + +uts_len := 64 + +define filechk_version.h + if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ + echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ + exit 1; \ + fi; \ + (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ + echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ + echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ + ) +endef + +include/linux/version.h: $(srctree)/Makefile FORCE + $(call filechk,version.h) + +# --------------------------------------------------------------------------- + +.PHONY: depend dep +depend dep: + @echo '*** Warning: make $@ is unnecessary now.' + +# --------------------------------------------------------------------------- +# Modules + +ifdef CONFIG_MODULES + +# By default, build modules as well + +all: modules + +# Build modules + +.PHONY: modules +modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) + @echo ' Building modules, stage 2.'; + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + + +# Target to prepare building external modules +.PHONY: modules_prepare +modules_prepare: prepare-all scripts + +# Target to install modules +.PHONY: modules_install +modules_install: _modinst_ _modinst_post + +.PHONY: _modinst_ +_modinst_: + @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ + echo "Warning: you may need to install module-init-tools"; \ + echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ + sleep 1; \ + fi + @rm -rf $(MODLIB)/kernel + @rm -f $(MODLIB)/source + @mkdir -p $(MODLIB)/kernel + @ln -s $(srctree) $(MODLIB)/source + @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ + rm -f $(MODLIB)/build ; \ + ln -s $(objtree) $(MODLIB)/build ; \ + fi + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst + +# If System.map exists, run depmod. This deliberately does not have a +# dependency on System.map since that would run the dependency tree on +# vmlinux. This depmod is only for convenience to give the initial +# boot a modules.dep even before / is mounted read-write. However the +# boot script depmod is the master version. +ifeq "$(strip $(INSTALL_MOD_PATH))" "" +depmod_opts := +else +depmod_opts := -b $(INSTALL_MOD_PATH) -r +endif +.PHONY: _modinst_post +_modinst_post: _modinst_ + if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi + +else # CONFIG_MODULES + +# Modules not configured +# --------------------------------------------------------------------------- + +modules modules_install: FORCE + @echo + @echo "The present kernel configuration has modules disabled." + @echo "Type 'make config' and enable loadable module support." + @echo "Then build a kernel with module support enabled." + @echo + @exit 1 + +endif # CONFIG_MODULES + +# Generate asm-offsets.h +# --------------------------------------------------------------------------- + +define filechk_gen-asm-offsets + (set -e; \ + echo "#ifndef __ASM_OFFSETS_H__"; \ + echo "#define __ASM_OFFSETS_H__"; \ + echo "/*"; \ + echo " * DO NOT MODIFY."; \ + echo " *"; \ + echo " * This file was generated by arch/$(ARCH)/Makefile"; \ + echo " *"; \ + echo " */"; \ + echo ""; \ + sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ + echo ""; \ + echo "#endif" ) +endef + + +### +# Cleaning is done on three levels. +# make clean Delete most generated files +# Leave enough to build external modules +# make mrproper Delete the current configuration, and all generated files +# make distclean Remove editor backup files, patch leftover files and the like + +# Directories & files removed with 'make clean' +CLEAN_DIRS += $(MODVERDIR) +CLEAN_FILES += vmlinux System.map \ + .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map + +# Directories & files removed with 'make mrproper' +MRPROPER_DIRS += include/config include2 +MRPROPER_FILES += .config .config.old include/asm .version \ + include/linux/autoconf.h include/linux/version.h \ + Module.symvers tags TAGS cscope* + +# clean - Delete most, but leave enough to build external modules +# +clean: rm-dirs := $(CLEAN_DIRS) +clean: rm-files := $(CLEAN_FILES) +clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) + +.PHONY: $(clean-dirs) clean archclean +$(clean-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) + +clean: archclean $(clean-dirs) + $(call cmd,rmdirs) + $(call cmd,rmfiles) + @find . $(RCS_FIND_IGNORE) \ + \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ + -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ + -type f -print | xargs rm -f + +# mrproper - Delete all generated files, including .config +# +mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) +mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) +mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) + +.PHONY: $(mrproper-dirs) mrproper archmrproper +$(mrproper-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) + +mrproper: clean archmrproper $(mrproper-dirs) + $(call cmd,rmdirs) + $(call cmd,rmfiles) + +# distclean +# +.PHONY: distclean + +distclean: mrproper + @find $(srctree) $(RCS_FIND_IGNORE) \ + \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ + -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ + -o -name '.*.rej' -o -size 0 \ + -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ + -type f -print | xargs rm -f + + +# Packaging of the kernel to various formats +# --------------------------------------------------------------------------- +# rpm target kept for backward compatibility +package-dir := $(srctree)/scripts/package + +.PHONY: %-pkg rpm + +%pkg: FORCE + $(Q)$(MAKE) -f $(package-dir)/Makefile $@ +rpm: FORCE + $(Q)$(MAKE) -f $(package-dir)/Makefile $@ + + +# Brief documentation of the typical targets used +# --------------------------------------------------------------------------- + +boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) +boards := $(notdir $(boards)) + +help: + @echo 'Cleaning targets:' + @echo ' clean - remove most generated files but keep the config' + @echo ' mrproper - remove all generated files + config + various backup files' + @echo '' + @echo 'Configuration targets:' + @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help + @echo '' + @echo 'Other generic targets:' + @echo ' all - Build all targets marked with [*]' + @echo '* vmlinux - Build the bare kernel' + @echo '* modules - Build all modules' + @echo ' modules_install - Install all modules' + @echo ' dir/ - Build all files in dir and below' + @echo ' dir/file.[ois] - Build specified target only' + @echo ' rpm - Build a kernel as an RPM package' + @echo ' tags/TAGS - Generate tags file for editors' + @echo ' cscope - Generate cscope index' + @echo '' + @echo 'Static analysers' + @echo ' buildcheck - List dangling references to vmlinux discarded sections' + @echo ' and init sections from non-init sections' + @echo ' checkstack - Generate a list of stack hogs' + @echo ' namespacecheck - Name space analysis on compiled kernel' + @echo '' + @echo 'Kernel packaging:' + @$(MAKE) -f $(package-dir)/Makefile help + @echo '' + @echo 'Documentation targets:' + @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp + @echo '' + @echo 'Architecture specific targets ($(ARCH)):' + @$(if $(archhelp),$(archhelp),\ + echo ' No architecture specific help defined for $(ARCH)') + @echo '' + @$(if $(boards), \ + $(foreach b, $(boards), \ + printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ + echo '') + + @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' + @echo ' make O=dir [targets] Locate all output files in "dir", including .config' + @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' + @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' + @echo '' + @echo 'Execute "make" or "make all" to build all targets marked with [*] ' + @echo 'For further info see the ./README file' + + +# Documentation targets +# --------------------------------------------------------------------------- +%docs: scripts_basic FORCE + $(Q)$(MAKE) $(build)=Documentation/DocBook $@ + +else # KBUILD_EXTMOD + +### +# External module support. +# When building external modules the kernel used as basis is considered +# read-only, and no consistency checks are made and the make +# system is not used on the basis kernel. If updates are required +# in the basis kernel ordinary make commands (without M=...) must +# be used. +# +# The following are the only valid targets when building external +# modules. +# make M=dir clean Delete all automatically generated files +# make M=dir modules Make all modules in specified dir +# make M=dir Same as 'make M=dir modules' +# make M=dir modules_install +# Install the modules build in the module directory +# Assumes install directory is already created + +# We are always building modules +KBUILD_MODULES := 1 +.PHONY: crmodverdir +crmodverdir: + $(Q)mkdir -p $(MODVERDIR) + +.PHONY: $(objtree)/Module.symvers +$(objtree)/Module.symvers: + @test -e $(objtree)/Module.symvers || ( \ + echo; \ + echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ + echo " is missing; modules will have no dependencies and modversions."; \ + echo ) + +module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) +.PHONY: $(module-dirs) modules +$(module-dirs): crmodverdir $(objtree)/Module.symvers + $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) + +modules: $(module-dirs) + @echo ' Building modules, stage 2.'; + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + +.PHONY: modules_install +modules_install: + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst + +clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) + +.PHONY: $(clean-dirs) clean +$(clean-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) + +clean: rm-dirs := $(MODVERDIR) +clean: $(clean-dirs) + $(call cmd,rmdirs) + @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ + \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ + -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ + -type f -print | xargs rm -f + +help: + @echo ' Building external modules.' + @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' + @echo '' + @echo ' modules - default target, build the module(s)' + @echo ' modules_install - install the module' + @echo ' clean - remove generated files in module directory only' + @echo '' +endif # KBUILD_EXTMOD + +# Generate tags for editors +# --------------------------------------------------------------------------- + +#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set +#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. +#Adding $(srctree) adds about 20M on i386 to the size of the output file! + +ifeq ($(KBUILD_OUTPUT),) +__srctree = +else +__srctree = $(srctree)/ +endif + +define all-sources + ( find $(__srctree) $(RCS_FIND_IGNORE) \ + \( -name include -o -name arch \) -prune -o \ + -name '*.[chS]' -print; \ + find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + find $(__srctree)include $(RCS_FIND_IGNORE) \ + \( -name config -o -name 'asm-*' \) -prune \ + -o -name '*.[chS]' -print; \ + find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print ) +endef + +quiet_cmd_cscope-file = FILELST cscope.files + cmd_cscope-file = $(all-sources) > cscope.files + +quiet_cmd_cscope = MAKE cscope.out + cmd_cscope = cscope -k -b -q + +cscope: FORCE + $(call cmd,cscope-file) + $(call cmd,cscope) + +quiet_cmd_TAGS = MAKE $@ +cmd_TAGS = $(all-sources) | etags - + +# Exuberant ctags works better with -I + +quiet_cmd_tags = MAKE $@ +define cmd_tags + rm -f $@; \ + CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL"`; \ + $(all-sources) | xargs ctags $$CTAGSF -a --extra=+f +endef + +TAGS: FORCE + $(call cmd,TAGS) + +tags: FORCE + $(call cmd,tags) + + +# Scripts to check various things for consistency +# --------------------------------------------------------------------------- + +configcheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkconfig.pl + +includecheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkincludes.pl + +versioncheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkversion.pl + +buildcheck: + $(PERL) $(srctree)/scripts/reference_discarded.pl + $(PERL) $(srctree)/scripts/reference_init.pl + +namespacecheck: + $(PERL) $(srctree)/scripts/namespace.pl + +endif #ifeq ($(config-targets),1) +endif #ifeq ($(mixed-targets),1) + +.PHONY: checkstack +checkstack: + $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ + $(PERL) $(src)/scripts/checkstack.pl $(ARCH) + +kernelrelease: + @echo $(KERNELRELEASE) + +# FIXME Should go into a make.lib or something +# =========================================================================== + +quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) + cmd_rmdirs = rm -rf $(rm-dirs) + +quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) + cmd_rmfiles = rm -f $(rm-files) + + +a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ + $(NOSTDINC_FLAGS) $(CPPFLAGS) \ + $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) + +quiet_cmd_as_o_S = AS $@ +cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + +# read all saved command lines + +targets := $(wildcard $(sort $(targets))) +cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + $(cmd_files): ; # Do not try to update included dependency files + include $(cmd_files) +endif + +# Execute command and generate cmd file +if_changed = $(if $(strip $? \ + $(filter-out $(cmd_$(1)),$(cmd_$@))\ + $(filter-out $(cmd_$@),$(cmd_$(1)))),\ + @set -e; \ + $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ + $(cmd_$(1)); \ + echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) + + +# execute the command and also postprocess generated .d dependencies +# file +if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ + $(filter-out $(cmd_$(1)),$(cmd_$@))\ + $(filter-out $(cmd_$@),$(cmd_$(1)))),\ + $(Q)set -e; \ + $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ + $(cmd_$(1)); \ + scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ + rm -f $(depfile); \ + mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) + +# Usage: $(call if_changed_rule,foo) +# will check if $(cmd_foo) changed, or any of the prequisites changed, +# and if so will execute $(rule_foo) + +if_changed_rule = $(if $(strip $? \ + $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ + $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ + $(Q)$(rule_$(1))) + +# If quiet is set, only print short version of command + +cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) + +# filechk is used to check if the content of a generated file is updated. +# Sample usage: +# define filechk_sample +# echo $KERNELRELEASE +# endef +# version.h : Makefile +# $(call filechk,sample) +# The rule defined shall write to stdout the content of the new file. +# The existing file will be compared with the new one. +# - If no file exist it is created +# - If the content differ the new file is used +# - If they are equal no change, and no timestamp update + +define filechk + @set -e; \ + echo ' CHK $@'; \ + mkdir -p $(dir $@); \ + $(filechk_$(1)) < $< > $@.tmp; \ + if [ -r $@ ] && cmp -s $@ $@.tmp; then \ + rm -f $@.tmp; \ + else \ + echo ' UPD $@'; \ + mv -f $@.tmp $@; \ + fi +endef + +# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir +# Usage: +# $(Q)$(MAKE) $(build)=dir +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj + +# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir +# Usage: +# $(Q)$(MAKE) $(clean)=dir +clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj + +# $(call descend,<dir>,<target>) +# Recursively call a sub-make in <dir> with target <target> +# Usage is deprecated, because make does not see this as an invocation of make. +descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) + +endif # skip-makefile + +FORCE: |