blob: 0a93dcb385411db5445d8314d1cd4cd9ad049146 [file] [log] [blame]
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 1
EXTRAVERSION =-rc2
# *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 of
# 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 = $(C)
endif
endif
ifndef KBUILD_CHECKSRC
KBUILD_CHECKSRC = 0
endif
# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntax'es are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
#
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assigment takes precedence over the KBUILD_OUTPUT environment variable.
# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(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 $(wildcard $(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) -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),)
srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
TOPDIR := $(srctree)
# FIXME - TOPDIR is obsolete, use srctree/objtree
objtree := $(CURDIR)
src := $(srctree)
obj := $(objtree)
VPATH := $(srctree)
export srctree objtree VPATH TOPDIR
KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
# 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 modules,$(MAKECMDGOALS)),)
KBUILD_MODULES := 1
endif
ifeq ($(MAKECMDGOALS),)
KBUILD_MODULES := 1
endif
export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
export KBUILD_CHECKSRC KBUILD_SRC
# 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
check_gcc = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
export quiet Q KBUILD_VERBOSE check_gcc
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(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
RPM := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \
else echo rpm; fi)
GENKSYMS = scripts/genksyms/genksyms
DEPMOD = /sbin/depmod
KALLSYMS = scripts/kallsyms
PERL = perl
CHECK = sparse
MODFLAGS = -DMODULE
CFLAGS_MODULE = $(MODFLAGS)
AFLAGS_MODULE = $(MODFLAGS)
LDFLAGS_MODULE = -r
CFLAGS_KERNEL =
AFLAGS_KERNEL =
NOSTDINC_FLAGS = -nostdinc -iwithprefix include
CPPFLAGS := -D__KERNEL__ -Iinclude \
$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common
AFLAGS := -D__ASSEMBLY__
export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION 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_BLOB LDFLAGS_MODULE CHECK
export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
export MODVERDIR := .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 := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o
RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
# ===========================================================================
# Rules shared between *config targets and build targets
# Helpers built in scripts/
scripts/docproc scripts/split-include : scripts ;
.PHONY: scripts scripts/fixdep
scripts:
$(Q)$(MAKE) $(build)=scripts
scripts/fixdep:
$(Q)$(MAKE) $(build)=scripts $@
# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
# For example 'make oldconfig all'.
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).
no-dot-config-targets := clean mrproper distclean \
cscope TAGS tags help %docs check%
config-targets := 0
mixed-targets := 0
dot-config := 1
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
dot-config := 0
endif
endif
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
config-targets := 1
ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
mixed-targets := 1
endif
endif
ifeq ($(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
%config: scripts/fixdep FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
config : scripts/fixdep FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.
# That's our default target when none is given on the command line
# Note that 'modules' will be added as a prerequisite as well,
# in the CONFIG_MODULES part below
all: vmlinux
# Objects we will link into vmlinux / subdirs we need to visit
init-y := init/
drivers-y := drivers/ sound/
net-y := net/
libs-y := lib/
core-y := usr/
SUBDIRS :=
ifeq ($(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
endif
include $(srctree)/arch/$(ARCH)/Makefile
# Let architecture Makefiles change CPPFLAGS if needed
CFLAGS := $(CPPFLAGS) $(CFLAGS)
AFLAGS := $(CPPFLAGS) $(AFLAGS)
core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
SUBDIRS += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
$(net-y) $(net-m) $(libs-y) $(libs-m)))
ALL_SUBDIRS := $(sort $(SUBDIRS) $(patsubst %/,%,$(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)
# Here goes the main Makefile
# ---------------------------------------------------------------------------
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
CFLAGS += -Os
else
CFLAGS += -O2
endif
ifndef CONFIG_FRAME_POINTER
CFLAGS += -fomit-frame-pointer
endif
ifdef CONFIG_DEBUG_INFO
CFLAGS += -g
endif
# warn about C99 declaration after statement
CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,)
#
# INSTALL_PATH specifies where to place the updated kernel and system map
# images. Uncomment if you want to place them anywhere other than root.
#
#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
# Build vmlinux
# ---------------------------------------------------------------------------
# This is a bit tricky: If we need to relink vmlinux, we want
# the version number incremented, which means recompile init/version.o
# and relink init/init.o. However, we cannot do this during the
# normal descending-into-subdirs phase, since at that time
# we cannot yet know if we will need to relink vmlinux.
# So we descend into init/ inside the rule for vmlinux again.
head-y += $(HEAD)
vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
quiet_cmd_vmlinux__ = LD $@
define cmd_vmlinux__
$(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
--start-group \
$(core-y) \
$(libs-y) \
$(drivers-y) \
$(net-y) \
--end-group \
$(filter .tmp_kallsyms%,$^) \
-o $@
endef
# set -e makes the rule exit immediately on error
define rule_vmlinux__
+set -e; \
$(if $(filter .tmp_kallsyms%,$^),, \
echo ' GEN .version'; \
. $(srctree)/scripts/mkversion > .tmp_version; \
mv -f .tmp_version .version; \
$(MAKE) $(build)=init; \
) \
$(if $($(quiet)cmd_vmlinux__), \
echo ' $($(quiet)cmd_vmlinux__)' &&) \
$(cmd_vmlinux__); \
echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
endef
define rule_vmlinux
$(rule_vmlinux__); \
$(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
endef
LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds.s
# Generate section listing all symbols and add it into vmlinux
# 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
# 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.
ifdef CONFIG_KALLSYMS
kallsyms.o := .tmp_kallsyms2.o
quiet_cmd_kallsyms = KSYM $@
cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) > $@
.tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE
$(call if_changed_dep,as_o_S)
.tmp_kallsyms%.S: .tmp_vmlinux%
$(call cmd,kallsyms)
.tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
+$(call if_changed_rule,vmlinux__)
.tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
$(call if_changed_rule,vmlinux__)
endif
# Finally the vmlinux rule
vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
$(call if_changed_rule,vmlinux)
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds.s: $(SUBDIRS) ;
# Handle descending into subdirectories listed in $(SUBDIRS)
.PHONY: $(SUBDIRS)
$(SUBDIRS): prepare-all
$(Q)$(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
# prepare1 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 $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
prepare1:
ifneq ($(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
prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
ifdef KBUILD_MODULES
ifeq ($(origin SUBDIRS),file)
$(Q)rm -rf $(MODVERDIR)
else
@echo '*** Warning: Overriding SUBDIRS on the command line can cause'
@echo '*** inconsistencies'
endif
endif
$(if $(CONFIG_MODULES),$(Q)mkdir -p $(MODVERDIR))
# All the preparing..
prepare-all: prepare0 prepare
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
export AFLAGS_vmlinux.lds.o += -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: scripts/split-include include/linux/autoconf.h
@echo ' SPLIT include/linux/autoconf.h -> include/config/*'
@scripts/split-include include/linux/autoconf.h include/config
@touch $@
# Generate some files
# ---------------------------------------------------------------------------
# version.h changes when $(KERNELRELEASE) etc change, as defined in
# this Makefile
uts_len := 64
define filechk_version.h
if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
echo '"$(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: Makefile
$(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: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux)
@echo ' Building modules, stage 2.';
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
# Install modules
.PHONY: modules_install
modules_install: _modinst_ _modinst_post
.PHONY: _modinst_
_modinst_:
@if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
echo "Warning: you may need to install module-init-tools"; \
echo "See http://www.codemonkey.org.uk/post-halloween-2.5.txt";\
sleep 1; \
fi
@rm -rf $(MODLIB)/kernel
@rm -f $(MODLIB)/build
@mkdir -p $(MODLIB)/kernel
@ln -s $(TOPDIR) $(MODLIB)/build
$(Q)$(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 ]; 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 all automatically generated files, including
# tools and firmware.
# make mrproper Delete the current configuration, and related files
# Any core files spread around are deleted as well
# make distclean Remove editor backup files, patch leftover files and the like
# Files removed with 'make clean'
CLEAN_FILES += vmlinux System.map MC*
# Files removed with 'make mrproper'
MRPROPER_FILES += \
include/linux/autoconf.h include/linux/version.h \
.version .config .config.old config.in config.old \
.menuconfig.log \
include/asm \
.hdepend include/linux/modversions.h \
tags TAGS cscope* kernel.spec \
.tmp*
# Directories removed with 'make mrproper'
MRPROPER_DIRS += \
$(MODVERDIR) \
.tmp_export-objs \
include/config \
include/linux/modules \
include2
# clean - Delete all intermediate files
#
clean-dirs += $(addprefix _clean_,$(ALL_SUBDIRS) Documentation/DocBook scripts)
.PHONY: $(clean-dirs) clean archclean mrproper archmrproper distclean
$(clean-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
quiet_cmd_rmclean = RM $$(CLEAN_FILES)
cmd_rmclean = rm -f $(CLEAN_FILES)
clean: archclean $(clean-dirs)
$(call cmd,rmclean)
@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 configuration + modules + core files
#
quiet_cmd_mrproper = RM $$(MRPROPER_DIRS) + $$(MRPROPER_FILES)
cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES)
mrproper distclean: clean archmrproper
@echo ' Making $@ in the srctree'
@find . $(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
$(call cmd,mrproper)
# Generate tags for editors
# ---------------------------------------------------------------------------
define all-sources
( find . $(RCS_FIND_IGNORE) \
\( -name include -o -name arch \) -prune -o \
-name '*.[chS]' -print; \
find arch/$(ARCH) $(RCS_FIND_IGNORE) \
-name '*.[chS]' -print; \
find include $(RCS_FIND_IGNORE) \
\( -name config -o -name 'asm-*' \) -prune \
-o -name '*.[chS]' -print; \
find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
-name '*.[chS]' -print; \
find include/asm-generic $(RCS_FIND_IGNORE) \
-name '*.[chS]' -print )
endef
quiet_cmd_cscope = MAKE $@
cmd_cscope = $(all-sources) | cscope -k -b -i -
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_NOVERS"`; \
$(all-sources) | xargs ctags $$CTAGSF -a
endef
cscope: FORCE
$(call cmd,cscope)
TAGS: FORCE
$(call cmd,TAGS)
tags: FORCE
$(call cmd,tags)
# RPM target
# ---------------------------------------------------------------------------
.PHONY: rpm
# Remove hyphens since they have special meaning in RPM filenames
KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE))
# If you do a make spec before packing the tarball you can rpm -ta it
spec:
$(CONFIG_SHELL) $(srctree)/scripts/mkspec > $(objtree)/kernel.spec
# a) Build a tar ball
# b) generate an rpm from it
# c) and pack the result
# - Use /. to avoid tar packing just the symlink
rpm: clean spec
set -e; \
cd .. ; \
ln -sf $(srctree) $(KERNELPATH) ; \
tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
rm $(KERNELPATH)
set -e; \
$(CONFIG_SHELL) $(srctree)/scripts/mkversion > $(objtree)/.tmp_version;\
mv -f $(objtree)/.tmp_version $(objtree)/.version;
$(RPM) --target $(UTS_MACHINE) -ta ../$(KERNELPATH).tar.gz
rm ../$(KERNELPATH).tar.gz
# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------
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 ''
@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 ''
@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 checker tool'
@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/docproc FORCE
$(Q)$(MAKE) $(build)=Documentation/DocBook $@
# 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
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)
# FIXME Should go into a make.lib or something
# ===========================================================================
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 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)))),\
@set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
$(cmd_$(1)); \
scripts/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)))),\
@$(rule_$(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: