diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 1620 |
1 files changed, 1190 insertions, 430 deletions
@@ -1,521 +1,1281 @@ -# Makefile for busybox +VERSION = 1 +PATCHLEVEL = 2 +SUBLEVEL = 1 +EXTRAVERSION = .svn +NAME=Unnamed + +# *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. # -# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> -# -# Licensed under GPLv2, see the file LICENSE in this tarball for details. +# 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 busybox), 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. -# You shouldn't have to edit anything in this file for configuration -# purposes, try "make help" or read http://busybox.net/FAQ.html. +# To put more focus on warnings, be less verbose as default +# Use 'make V=1' to see the full commands -.PHONY: dummy subdirs release distclean clean config oldconfig menuconfig \ - tags check test depend dep buildtree hosttools _all checkhelp \ - sizes bloatcheck baseline objsizes +ifdef V + ifeq ("$(origin V)", "command line") + KBUILD_VERBOSE = $(V) + endif +endif +ifndef KBUILD_VERBOSE + KBUILD_VERBOSE = 0 +endif -noconfig_targets := menuconfig config oldconfig randconfig hosttools \ - defconfig allyesconfig allnoconfig allbareconfig \ - clean distclean help \ - release tags +# Call sparse as part of compilation of C files +# Use 'make C=1' to enable sparse checking -nocheck_targets := clean distclean help release tags +ifdef C + ifeq ("$(origin C)", "command line") + KBUILD_CHECKSRC = $(C) + endif +endif +ifndef KBUILD_CHECKSRC + KBUILD_CHECKSRC = 0 +endif -# the toplevel sourcedir -ifndef top_srcdir -top_srcdir=$(CURDIR) +# 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 ?= $(SUBDIRS) endif -# toplevel directory of the object-tree -ifndef top_builddir -top_builddir=$(CURDIR) +ifdef M + ifeq ("$(origin M)", "command line") + KBUILD_EXTMOD := $(M) + endif endif -export srctree=$(top_srcdir) -vpath %/Config.in $(srctree) -DIRS:=applets archival archival/libunarchive coreutils console-tools \ - debianutils editors findutils init miscutils modutils networking \ - networking/libiproute networking/udhcp procps loginutils shell \ - sysklogd util-linux e2fsprogs libpwdgrp coreutils/libcoreutils \ - runit libbb +# kbuild supports saving output files in a separate directory. +# To locate output files in a separate directory two syntaxes are supported. +# In both cases the working directory must be the root of the kernel src. +# 1) O= +# Use "make O=dir/to/store/output/files/" +# +# 2) Set KBUILD_OUTPUT +# Set the environment variable KBUILD_OUTPUT to point to the directory +# where the output files shall be placed. +# export KBUILD_OUTPUT=dir/to/store/output/files/ +# make +# +# The O= assignment takes precedence over the KBUILD_OUTPUT environment +# variable. -SRC_DIRS:=$(patsubst %,$(top_srcdir)/%,$(DIRS)) -# That's our default target when none is given on the command line -_all: - -CONFIG_CONFIG_IN = $(top_srcdir)/Config.in +# KBUILD_SRC is set on invocation of make in OBJ directory +# KBUILD_SRC is not intended to be used by the regular user (for now) +ifeq ($(KBUILD_SRC),) -ifeq ($(BUILD_SRC),) +# OK, Make called in directory where kernel src resides +# Do we want to locate output files in a separate directory? ifdef O ifeq ("$(origin O)", "command line") - BUILD_OUTPUT := $(O) - top_builddir := $(O) + 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_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 -# If no alternate output-dir was specified, we build in cwd -# We are using BUILD_OUTPUT nevertheless to make sure that we create -# Rules.mak and the toplevel Makefile, in case they don't exist. - BUILD_OUTPUT := $(top_builddir) +_all: modules endif -# see if we are in verbose mode -BUILD_VERBOSE := -ifdef V - ifeq ("$(origin V)", "command line") - BUILD_VERBOSE := $(V) - endif +srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) +TOPDIR := $(srctree) +# FIXME - TOPDIR is obsolete, use srctree/objtree +objtree := $(CURDIR) +src := $(srctree) +obj := $(objtree) + +VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) + +export srctree objtree VPATH TOPDIR + + +# 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/ \ + -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) + +# 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 $(CONFIG_MODVERSIONS),1) endif -ifdef VERBOSE - ifeq ("$(origin VERBOSE)", "command line") - BUILD_VERBOSE := $(VERBOSE) - endif + +# If we have "make <whatever> modules", compile modules +# in addition to whatever we do anyway. +# Just "make" or "make all" shall build modules as well + +ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) + KBUILD_MODULES := 1 +endif + +ifeq ($(MAKECMDGOALS),) + KBUILD_MODULES := 1 endif -ifneq ($(strip $(BUILD_VERBOSE)),) - export BUILD_VERBOSE - CHECK_VERBOSE := -v -# ARFLAGS+=v +export KBUILD_MODULES KBUILD_BUILTIN +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 useful +# 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 -ifneq ($(strip $(HAVE_DOT_CONFIG)),y) -# pull in settings early --include $(top_srcdir)/Rules.mak +# If the user is running make -s (silent mode), suppress echoing of +# commands + +ifneq ($(findstring s,$(MAKEFLAGS)),) + quiet=silent_ endif -# All object directories. -OBJ_DIRS := $(DIRS) -all_tree := $(patsubst %,$(top_builddir)/%,$(OBJ_DIRS) scripts scripts/config include) -all_tree: $(all_tree) -$(all_tree): - @mkdir -p "$@" +export quiet Q KBUILD_VERBOSE + + +# Look for make include files relative to root of kernel src +MAKEFLAGS += --include-dir=$(srctree) + +# We need some generic definitions +include $(srctree)/scripts/Kbuild.include + +# 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 + +CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) +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 +CFLAGS := +CPPFLAGS := +AFLAGS := +include $(srctree)/Makefile.flags + +# Read KERNELRELEASE from .kernelrelease (if it exists) +KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) +KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) + +export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ + 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 + +# Files to ignore in find ... statements + +RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o +export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git + +# =========================================================================== +# Rules shared between *config targets and build targets + +# Basic helpers built in scripts/ +PHONY += scripts_basic +scripts_basic: + $(Q)$(MAKE) $(build)=scripts/basic + +# To avoid any implicit rule to kick in, define an empty command. +scripts/basic/%: scripts_basic ; + +PHONY += outputmakefile +# outputmakefile generates a Makefile in the output directory, if using a +# separate output directory. This allows convenient use of make in the +# output directory. +outputmakefile: +ifneq ($(KBUILD_SRC),) + $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ + $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) +endif -ifneq ($(BUILD_OUTPUT),) -# Invoke a second make in the output directory, passing relevant variables -# Check that the output directory actually exists -saved-output := $(BUILD_OUTPUT) -BUILD_OUTPUT := $(shell cd $(BUILD_OUTPUT) && /bin/pwd) -$(if $(wildcard $(BUILD_OUTPUT)),, \ - $(error output directory "$(saved-output)" does not exist)) +# 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 -.PHONY: $(MAKECMDGOALS) +ifeq ($(KBUILD_EXTMOD),) + ifneq ($(filter config %config,$(MAKECMDGOALS)),) + config-targets := 1 + ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) + mixed-targets := 1 + endif + endif +endif -$(filter-out _all,$(MAKECMDGOALS)) _all: $(BUILD_OUTPUT)/Rules.mak $(BUILD_OUTPUT)/Makefile all_tree - $(Q)$(MAKE) -C $(BUILD_OUTPUT) \ - top_srcdir=$(top_srcdir) \ - top_builddir=$(top_builddir) \ - BUILD_SRC=$(top_srcdir) \ - -f $(CURDIR)/Makefile $@ +ifeq ($(mixed-targets),1) +# =========================================================================== +# We're called with mixed targets (*config and build targets). +# Handle them one by one. -$(BUILD_OUTPUT)/Rules.mak: - @echo > $@ - @echo top_srcdir=$(top_srcdir) >> $@ - @echo top_builddir=$(BUILD_OUTPUT) >> $@ - @echo include $(top_srcdir)/Rules.mak >> $@ +%:: FORCE + $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ -$(BUILD_OUTPUT)/Makefile: - @echo > $@ - @echo top_srcdir=$(top_srcdir) >> $@ - @echo top_builddir=$(BUILD_OUTPUT) >> $@ - @echo BUILD_SRC='$$(top_srcdir)' >> $@ - @echo include '$$(BUILD_SRC)'/Makefile >> $@ +else +ifeq ($(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 %config: scripts_basic outputmakefile FORCE + $(Q)mkdir -p include/linux + $(Q)$(MAKE) $(build)=scripts/kconfig $@ + $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease -# Leave processing to above invocation of make -skip-makefile := 1 -endif # ifneq ($(BUILD_OUTPUT),) -endif # ifeq ($(BUILD_SRC),) +else +# =========================================================================== +# Build targets only - this includes busybox, arch specific targets, clean +# targets and others. In general all targets except *config targets. + +ifeq ($(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/autoconf.h + +# Objects we will link into busybox / subdirs we need to visit +core-y := \ + applets/ \ + +libs-y := \ + archival/ \ + archival/libunarchive/ \ + console-tools/ \ + coreutils/ \ + coreutils/libcoreutils/ \ + debianutils/ \ + e2fsprogs/ \ + e2fsprogs/blkid/ \ + e2fsprogs/e2p/ \ + e2fsprogs/ext2fs/ \ + e2fsprogs/uuid/ \ + editors/ \ + findutils/ \ + init/ \ + libbb/ \ + libpwdgrp/ \ + loginutils/ \ + miscutils/ \ + modutils/ \ + networking/ \ + networking/libiproute/ \ + networking/udhcp/ \ + procps/ \ + runit/ \ + shell/ \ + sysklogd/ \ + util-linux/ \ + +endif # KBUILD_EXTMOD + +ifeq ($(dot-config),1) +# In this section, we need .config -ifeq ($(skip-makefile),) +# Read in dependencies to all Kconfig* files, make sure to run +# oldconfig if changes are detected. +-include .kconfig.d -# We only need a copy of the Makefile for the config targets and reuse -# the rest from the source directory, i.e. we do not cp ALL_MAKEFILES. -scripts/config/Makefile: $(top_srcdir)/scripts/config/Makefile - cp $< $@ +include .config -_all: all +# If .config needs to be updated, it will be done via the dependency +# that autoconf has on .config. +# To avoid any implicit rule to kick in, define an empty command +.config .kconfig.d: ; -help: - @echo 'Cleaning:' - @echo ' clean - delete temporary files created by build' - @echo ' distclean - delete all non-source files (including .config)' - @echo - @echo 'Build:' - @echo ' all - Executable and documentation' - @echo ' busybox - the swiss-army executable' - @echo ' doc - docs/BusyBox.{txt,html,1}' - @echo ' html - create html-based cross-reference' - @echo - @echo 'Configuration:' - @echo ' allnoconfig - disable all symbols in .config' - @echo ' allyesconfig - enable all symbols in .config (see defconfig)' - @echo ' allbareconfig - enable all applets without any sub-features' - @echo ' config - text based configurator (of last resort)' - @echo ' defconfig - set .config to largest generic configuration' - @echo ' menuconfig - interactive curses-based configurator' - @echo ' oldconfig - resolve any unresolved symbols in .config' - @echo ' hosttools - build sed for the host.' - @echo ' You can use these commands if the commands on the host' - @echo ' is unusable. Afterwards use it like:' - @echo ' make SED="$(top_builddir)/sed"' - @echo - @echo 'Installation:' - @echo ' install - install busybox into $(PREFIX)' - @echo ' uninstall' - @echo - @echo 'Development:' - @echo ' baseline - create busybox_old for bloatcheck.' - @echo ' bloatcheck - show size difference between old and new versions' - @echo ' check - run the test suite for all applets' - @echo ' checkhelp - check for missing help-entries in Config.in' - @echo ' randconfig - generate a random configuration' - @echo ' release - create a distribution tarball' - @echo ' sizes - show size of all enabled busybox symbols' - @echo ' objsizes - show size of each .o object built' - @echo +# If .config is newer than include/autoconf.h, someone tinkered +# with it and forgot to run make oldconfig. +# If kconfig.d is missing then we are probarly in a cleaned tree so +# we execute the config step to be sure to catch updated Kconfig files +include/autoconf.h: .kconfig.d .config + $(Q)mkdir -p include/linux + $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig +else +# Dummy target needed, because used as prerequisite +include/autoconf.h: ; +endif -include $(top_srcdir)/Rules.mak +# The all: target is the default when no target is given on the +# command line. +# This allow a user to issue only 'make' to build a kernel including modules +# Defaults busybox but it is usually overriden in the arch makefile +all: busybox -ifneq ($(strip $(HAVE_DOT_CONFIG)),y) +-include $(srctree)/arch/$(ARCH)/Makefile -# Default target if none was requested explicitly -all: menuconfig +# arch Makefile may override CC so keep this after arch Makefile is included +#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) +CHECKFLAGS += $(NOSTDINC_FLAGS) -# warn if no configuration exists and we are asked to build a non-config target -.config: - @echo "" - @echo "No $(top_builddir)/$@ found!" - @echo "Please refer to 'make help', section Configuration." - @echo "" - @exit 1 +# 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 ?= busybox + +# +# 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),) +busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) + +busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ + $(core-n) $(core-) $(libs-n) $(libs-) \ + ))) + +core-y := $(patsubst %/, %/built-in.o, $(core-y)) +libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) +libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) +libs-y := $(libs-y1) $(libs-y2) -# configuration + +# Build busybox # --------------------------------------------------------------------------- +# busybox is build from the objects selected by $(busybox-init) and +# $(busybox-main). Most are built-in.o files from top-level directories +# in the kernel tree, others are specified in arch/$(ARCH)Makefile. +# Ordering when linking is important, and $(busybox-init) must be first. +# +# busybox +# ^ +# | +# +-< $(busybox-init) +# | +--< init/version.o + more +# | +# +--< $(busybox-main) +# | +--< driver/built-in.o mm/built-in.o + more +# | +# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) +# +# busybox version (uname -v) cannot be updated during normal +# descending-into-subdirs phase since we do not yet know if we need to +# update busybox. +# Therefore this step is delayed until just before final link of busybox - +# 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 + +busybox-all := $(core-y) $(libs-y) + +# Rule to link busybox - also used during CONFIG_KALLSYMS +# May be overridden by arch/$(ARCH)/Makefile +quiet_cmd_busybox__ ?= LINK $@ + cmd_busybox__ ?= scripts/trylink $(CC) -o $@ \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $(busybox-all) -Wl,--end-group \ + +# Generate System.map +quiet_cmd_sysmap = SYSMAP + cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap + +# Link of busybox +# If CONFIG_KALLSYMS is set .version is already updated +# Generate System.map and verify that the content is consistent +# Use + in front of the busybox_version rule to silent warning with make -j2 +# First command is ':' to allow us to use + in front of the rule +define rule_busybox__ + : + $(call cmd,busybox__) + $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd +endef + + +ifdef CONFIG_KALLSYMS +# Generate section listing all symbols and add it into busybox $(kallsyms.o) +# It's a three stage process: +# o .tmp_busybox1 has all symbols and sections, but __kallsyms is +# empty +# Running kallsyms on that gives us .tmp_kallsyms1.o with +# the right size - busybox version (uname -v) is updated during this step +# o .tmp_busybox2 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 busybox. +# o Verify that the System.map from busybox matches the map from +# .tmp_busybox2, just in case we did not generate kallsyms correctly. +# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using +# .tmp_busybox3 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 -scripts/config/conf: scripts/config/Makefile - $(Q)$(MAKE) -C scripts/config conf - -@if [ ! -f .config ] ; then \ - touch .config; \ - fi +kallsyms.o := .tmp_kallsyms$(last_kallsyms).o -scripts/config/mconf: scripts/config/Makefile - $(Q)$(MAKE) -C scripts/config ncurses conf mconf - -@if [ ! -f .config ] ; then \ - touch .config; \ - fi +define verify_kallsyms + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ + $(cmd_sysmap) .tmp_busybox$(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 -menuconfig: scripts/config/mconf - @[ -f .config ] || $(MAKE) $(MAKEFLAGS) defconfig - @./scripts/config/mconf $(CONFIG_CONFIG_IN) +# Update busybox version before link +# Use + in front of this rule to silent warning about make -j1 +# First command is ':' to allow us to use + in front of this rule +cmd_ksym_ld = $(cmd_busybox__) +define rule_ksym_ld + : + +$(call cmd,busybox_version) + $(call cmd,busybox__) + $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd +endef -config: scripts/config/conf - @./scripts/config/conf $(CONFIG_CONFIG_IN) +# Generate .S file with all kernel symbols +quiet_cmd_kallsyms = KSYM $@ + cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ + $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ -oldconfig: scripts/config/conf - @./scripts/config/conf -o $(CONFIG_CONFIG_IN) +.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE + $(call if_changed_dep,as_o_S) -randconfig: scripts/config/conf - @./scripts/config/conf -r $(CONFIG_CONFIG_IN) +.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) + $(call cmd,kallsyms) -allyesconfig: scripts/config/conf - @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null +# .tmp_busybox1 must be complete except kallsyms, so update busybox version +.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE + $(call if_changed_rule,ksym_ld) -allnoconfig: scripts/config/conf - @./scripts/config/conf -n $(CONFIG_CONFIG_IN) > /dev/null +.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE + $(call if_changed,busybox__) -# defconfig is allyesconfig minus any features that are specialized enough -# or cause enough behavior change that the user really should switch them on -# manually if that's what they want. Sort of "maximum sane config". +.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE + $(call if_changed,busybox__) -defconfig: scripts/config/conf - @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null - @$(SED) -i -r -e "s/^(CONFIG_(DEBUG.*|STATIC|SELINUX|NITPICK|BUILD_(AT_ONCE|LIBBUSYBOX)|FEATURE_(DEVFS|FULL_LIBBUSYBOX|SHARED_BUSYBOX|MTAB_SUPPORT|CLEAN_UP|UDHCP_DEBUG)|INSTALL_NO_USR))=.*/# \1 is not set/" .config - @./scripts/config/conf -o $(CONFIG_CONFIG_IN) > /dev/null +# Needs to visit scripts/ before $(KALLSYMS) can be used. +$(KALLSYMS): scripts ; +# Generate some data for debugging strange kallsyms problems +debug_kallsyms: .tmp_map$(last_kallsyms) -allbareconfig: scripts/config/conf - @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null - @$(SED) -i -r -e "s/^(CONFIG_(DEBUG|STATIC|SELINUX|DEVFSD|NC_GAPING_SECURITY_HOLE|BUILD_AT_ONCE)).*/# \1 is not set/" .config - @$(SED) -i -e "/FEATURE/s/=.*//;/^[^#]/s/.*FEATURE.*/# \0 is not set/;" .config - @echo "CONFIG_FEATURE_BUFFERS_GO_ON_STACK=y" >> .config - @yes n | ./scripts/config/conf -o $(CONFIG_CONFIG_IN) > /dev/null +.tmp_map%: .tmp_busybox% FORCE + ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ -hosttools: - $(Q)cp .config .config.bak || noold=yea - $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" allnoconfig - $(Q)mv .config .config.in - $(Q)(grep -v CONFIG_SED .config.in ; \ - echo "CONFIG_SED=y" ; ) > .config - $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" oldconfig include/bb_config.h - $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" busybox - $(Q)[ -f .config.bak ] && mv .config.bak .config || rm .config - mv busybox sed - @echo "Now do: $(MAKE) SED=$(top_builddir)/sed <target>" +.tmp_map3: .tmp_map2 -else # ifneq ($(strip $(HAVE_DOT_CONFIG)),y) +.tmp_map2: .tmp_map1 -all: busybox busybox.links doc +endif # ifdef CONFIG_KALLSYMS -# In this section, we need .config --include $(top_builddir)/.config.cmd -include $(patsubst %,%/Makefile.in, $(SRC_DIRS)) - -endif # ifneq ($(strip $(HAVE_DOT_CONFIG)),y) - --include $(top_builddir)/.config --include $(top_builddir)/.depend - - -ifeq ($(strip $(CONFIG_BUILD_AT_ONCE)),y) -libraries-y:= -# Which parts of the internal libs are requested? -# Per default we only want what was actually selected. -# -a denotes all while -y denotes the selected ones. -ifeq ($(strip $(CONFIG_FEATURE_FULL_LIBBUSYBOX)),y) -LIBRARY_DEFINE:=$(LIBRARY_DEFINE-a) -LIBRARY_SRC :=$(LIBRARY_SRC-a) -else # CONFIG_FEATURE_FULL_LIBBUSYBOX -LIBRARY_DEFINE:=$(LIBRARY_DEFINE-y) -LIBRARY_SRC :=$(LIBRARY_SRC-y) -endif # CONFIG_FEATURE_FULL_LIBBUSYBOX -APPLET_SRC:=$(APPLET_SRC-y) -APPLETS_DEFINE:=$(APPLETS_DEFINE-y) -else # CONFIG_BUILD_AT_ONCE -APPLET_SRC:= -# no --combine, build archives out of the individual .o -# This was the old way the binary was built. -libbusybox-obj:=archival/libunarchive/libunarchive.a \ - networking/libiproute/libiproute.a \ - libpwdgrp/libpwdgrp.a \ - coreutils/libcoreutils/libcoreutils.a \ - libbb/libbb.a -libbusybox-obj:=$(patsubst %,$(top_builddir)/%,$(libbusybox-obj)) - -ifeq ($(strip $(CONFIG_FEATURE_SHARED_BUSYBOX)),y) -# linking against libbusybox, so don't build the .a already contained in the .so -libraries-y:=$(filter-out $(libbusybox-obj),$(libraries-y)) -endif # CONFIG_FEATURE_SHARED_BUSYBOX -endif # CONFIG_BUILD_AT_ONCE - - -ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) -LD_LIBBUSYBOX:=libbusybox.so -LIBBUSYBOX_SONAME:=$(LD_LIBBUSYBOX).$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION) -DO_INSTALL_LIBS:=$(LD_LIBBUSYBOX) \ - $(LD_LIBBUSYBOX).$(MAJOR_VERSION) \ - $(LD_LIBBUSYBOX).$(MAJOR_VERSION).$(MINOR_VERSION) -endif # CONFIG_BUILD_LIBBUSYBOX - -ifeq ($(strip $(CONFIG_BUILD_AT_ONCE)),y) -ifneq ($(strip $(CONFIG_FEATURE_SHARED_BUSYBOX)),y) -# --combine but not linking against libbusybox, so compile all -BUSYBOX_SRC := $(LIBRARY_SRC) -BUSYBOX_DEFINE:= $(LIBRARY_DEFINE) -endif # !CONFIG_FEATURE_SHARED_BUSYBOX -$(LIBBUSYBOX_SONAME): $(LIBRARY_SRC) -else # CONFIG_BUILD_AT_ONCE -$(LIBBUSYBOX_SONAME): $(libbusybox-obj) -endif # CONFIG_BUILD_AT_ONCE - -ifeq ($(strip $(CONFIG_FEATURE_SHARED_BUSYBOX)),y) -LDBUSYBOX:=-L$(top_builddir) -lbusybox +# busybox image - including updated kernel symbols +busybox_unstripped: $(busybox-all) FORCE + $(call if_changed_rule,busybox__) + $(Q)rm -f .old_version + +busybox: busybox_unstripped + $(Q)strip -s --remove-section=.note --remove-section=.comment \ + busybox_unstripped -o $@ + +# The actual objects are generated when descending, +# make sure no implicit rule kicks in +$(sort $(busybox-all)): $(busybox-dirs) ; + +# Handle descending into subdirectories listed in $(busybox-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 += $(busybox-dirs) +$(busybox-dirs): prepare scripts + $(Q)$(MAKE) $(build)=$@ + +# Build the kernel release string +# The KERNELRELEASE is stored in a file named .kernelrelease +# to be used when executing for example make install or make modules_install +# +# Take the contents of any files called localversion* and the config +# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. +# LOCALVERSION from the command line override all of this + +nullstring := +space := $(nullstring) # end of line + +___localver = $(objtree)/localversion* $(srctree)/localversion* +__localver = $(sort $(wildcard $(___localver))) +# skip backup files (containing '~') +_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) + +localver = $(subst $(space),, \ + $(shell cat /dev/null $(_localver)) \ + $(patsubst "%",%,$(CONFIG_LOCALVERSION))) + +# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called +# and if the SCM is know a tag from the SCM is appended. +# The appended tag is determinded by the SCM used. +# +# Currently, only git is supported. +# Other SCMs can edit scripts/setlocalversion and add the appropriate +# checks as needed. +ifdef CONFIG_LOCALVERSION_AUTO + _localver-auto = $(shell $(CONFIG_SHELL) \ + $(srctree)/scripts/setlocalversion $(srctree)) + localver-auto = $(LOCALVERSION)$(_localver-auto) endif -ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) -$(LIBBUSYBOX_SONAME): -ifndef MAJOR_VERSION - $(error MAJOR_VERSION needed for $@ is not defined) +localver-full = $(localver)$(localver-auto) + +# Store (new) KERNELRELASE string in .kernelrelease +kernelrelease = $(KERNELVERSION)$(localver-full) +.kernelrelease: FORCE + $(Q)rm -f $@ + $(Q)echo $(kernelrelease) > $@ + + +# Things we need to do before we recursively start building the kernel +# or the modules are listed in "prepare". +# A multi level approach is used. prepareN is processed before prepareN-1. +# archprepare is used in arch Makefiles and when processed asm symlink, +# version.h and scripts_basic is processed / created. + +# Listed in dependency order +PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 + +# prepare-all is deprecated, use prepare as valid replacement +PHONY += prepare-all + +# prepare3 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 $(srctree) +# 2) Create the include2 directory, used for the second asm symlink +prepare3: .kernelrelease +ifneq ($(KBUILD_SRC),) + @echo ' Using $(srctree) as source for kernel' + $(Q)if [ -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 - $(do_link.so) \ - -Wl,-soname=$(LD_LIBBUSYBOX).$(MAJOR_VERSION) \ - -Wl,-z,combreloc - @rm -f $(DO_INSTALL_LIBS) - @for i in $(DO_INSTALL_LIBS); do ln -s $(@) $$i ; done - $(do_strip) -endif # ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) +# prepare2 creates a makefile if using a separate output directory +prepare2: prepare3 outputmakefile + +prepare1: prepare2 include/config/MARKER +ifneq ($(KBUILD_MODULES),) + $(Q)mkdir -p $(MODVERDIR) + $(Q)rm -f $(MODVERDIR)/* +endif -busybox_unstripped: .depend $(LIBBUSYBOX_SONAME) $(BUSYBOX_SRC) $(APPLET_SRC) $(libraries-y) - $(do_link) +archprepare: prepare1 scripts_basic -busybox: busybox_unstripped - $(Q)cp busybox_unstripped busybox - $(do_strip) +prepare0: archprepare FORCE + $(Q)$(MAKE) $(build)=. -%.bflt: %_unstripped - $(do_elf2flt) +# All the preparing.. +prepare prepare-all: prepare0 -busybox.links: $(top_srcdir)/applets/busybox.mkll include/bb_config.h $(top_srcdir)/include/applets.h - $(Q)-$(SHELL) $^ >$@ +# Leave this as default for preprocessing busybox.lds.S, which is now +# done in arch/$(ARCH)/kernel/Makefile -install: $(top_srcdir)/applets/install.sh busybox busybox.links - $(Q)DO_INSTALL_LIBS="$(strip $(LIBBUSYBOX_SONAME) $(DO_INSTALL_LIBS))" \ - $(SHELL) $< $(PREFIX) $(INSTALL_OPTS) -ifeq ($(strip $(CONFIG_FEATURE_SUID)),y) - @echo +export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) + +# 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. + +#bbox# include/asm: +#bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' +#bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; +#bbox# @ln -fsn asm-$(ARCH) $@ + +# Split autoconf.h into include/linux/config/* +#bbox# piggybacked generation of few .h files +include/config/MARKER: scripts/basic/split-include include/autoconf.h + @echo ' SPLIT include/autoconf.h -> include/config/*' + @scripts/basic/split-include include/autoconf.h include/config + @echo ' GEN include/bbconfigopts.h' + @scripts/mkconfigs >include/bbconfigopts.h + @$(MAKE) $(build)=scripts + @echo ' GEN include/usage_compressed.h' + @scripts/usage_compressed include/usage_compressed.h scripts + @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 + +# --------------------------------------------------------------------------- + +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: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) + @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 scripts + +# Target to install modules +PHONY += modules_install +modules_install: _modinst_ _modinst_post + +PHONY += _modinst_ +_modinst_: + @if [ -z "`$(DEPMOD) -V 2>/dev/null | 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 +# busybox. 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 -------------------------------------------------- - @echo You will probably need to make your busybox binary - @echo setuid root to ensure all configured applets will - @echo work properly. - @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 -endif + @exit 1 -uninstall: busybox.links - rm -f $(PREFIX)/bin/busybox - for i in `cat busybox.links` ; do rm -f $(PREFIX)$$i; done -ifneq ($(strip $(DO_INSTALL_LIBS)),n) - for i in $(LIBBUSYBOX_SONAME) $(DO_INSTALL_LIBS); do \ - rm -f $(PREFIX)$$i; \ - done -endif +endif # CONFIG_MODULES -check test: busybox - bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite SED="$(SED)" \ - $(SHELL) $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE) +### +# 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 += busybox System.map \ + .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map + +# Directories & files removed with 'make mrproper' +MRPROPER_DIRS += include/config include2 +MRPROPER_FILES += .config .config.old include/asm .version .old_version \ + include/autoconf.h \ + .kernelrelease 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 := $(addprefix _clean_,$(srctree) $(busybox-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) -checkhelp: - $(Q)$(top_srcdir)/scripts/checkhelp.awk \ - $(wildcard $(patsubst %,%/Config.in,$(SRC_DIRS) ./)) +PHONY += $(mrproper-dirs) mrproper archmrproper +$(mrproper-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) -sizes: busybox_unstripped - $(NM) --size-sort $(<) +mrproper: clean archmrproper $(mrproper-dirs) + $(call cmd,rmdirs) + $(call cmd,rmfiles) -bloatcheck: busybox_old busybox_unstripped - @$(top_srcdir)/scripts/bloat-o-meter busybox_old busybox_unstripped +# distclean +# +PHONY += distclean -baseline: busybox_unstripped - @mv busybox_unstripped busybox_old +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 -objsizes: busybox_unstripped - $(SHELL) $(top_srcdir)/scripts/objsizes -# Documentation Targets -doc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html +# Packaging of the kernel to various formats +# --------------------------------------------------------------------------- +# rpm target kept for backward compatibility +package-dir := $(srctree)/scripts/package -docs/busybox.pod : $(top_srcdir)/docs/busybox_header.pod $(top_srcdir)/include/usage.h $(top_srcdir)/docs/busybox_footer.pod $(top_srcdir)/docs/autodocifier.pl - $(disp_doc) - $(Q)-mkdir -p docs - $(Q)-( cat $(top_srcdir)/docs/busybox_header.pod ; \ - $(top_srcdir)/docs/autodocifier.pl $(top_srcdir)/include/usage.h ; \ - cat $(top_srcdir)/docs/busybox_footer.pod ; ) > docs/busybox.pod +%pkg: FORCE + $(Q)$(MAKE) $(build)=$(package-dir) $@ +rpm: FORCE + $(Q)$(MAKE) $(build)=$(package-dir) $@ -docs/BusyBox.txt: docs/busybox.pod - $(disp_doc) - $(Q)-mkdir -p docs - $(Q)-pod2text $< > $@ -docs/BusyBox.1: docs/busybox.pod - $(disp_doc) - $(Q)-mkdir -p docs - $(Q)-pod2man --center=BusyBox --release="version $(VERSION)" \ - $< > $@ +# Brief documentation of the typical targets used +# --------------------------------------------------------------------------- -docs/BusyBox.html: docs/busybox.net/BusyBox.html - $(disp_doc) - $(Q)-mkdir -p docs - $(Q)-rm -f docs/BusyBox.html - $(Q)-cp docs/busybox.net/BusyBox.html docs/BusyBox.html +boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) +boards := $(notdir $(boards)) -docs/busybox.net/BusyBox.html: docs/busybox.pod - $(Q)-mkdir -p docs/busybox.net - $(Q)-pod2html --noindex $< > \ - docs/busybox.net/BusyBox.html - $(Q)-rm -f pod2htm* +-include Makefile.help -# The nifty new dependency stuff -scripts/bb_mkdep: $(top_srcdir)/scripts/bb_mkdep.c - $(do_link.h) +# 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) + $(Q)rm -f $(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: _emodinst_ _emodinst_post + +install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) +PHONY += _emodinst_ +_emodinst_: + $(Q)mkdir -p $(MODLIB)/$(install-dir) + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst + +# Run depmod only is we have System.map and depmod is executable +quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) + cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ + $(DEPMOD) -ae -F System.map \ + $(if $(strip $(INSTALL_MOD_PATH)), \ + -b $(INSTALL_MOD_PATH) -r) \ + $(KERNELRELEASE); \ + fi + +PHONY += _emodinst_post +_emodinst_post: _emodinst_ + $(call cmd,depmod) + +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 -DEP_INCLUDES := include/bb_config.h +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 '' + +# Dummies... +PHONY += prepare scripts +prepare: ; +scripts: ; +endif # KBUILD_EXTMOD + +# Generate tags for editors +# --------------------------------------------------------------------------- -ifeq ($(strip $(CONFIG_BBCONFIG)),y) -DEP_INCLUDES += include/bbconfigopts.h +#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! -include/bbconfigopts.h: .config $(top_srcdir)/scripts/config/mkconfigs - $(disp_gen) - $(Q)$(top_srcdir)/scripts/config/mkconfigs > $@ +ifeq ($(src),$(obj)) +__srctree = +else +__srctree = $(srctree)/ endif -ifeq ($(strip $(CONFIG_FEATURE_COMPRESS_USAGE)),y) -USAGE_BIN:=scripts/usage -$(USAGE_BIN): $(top_srcdir)/scripts/usage.c .config \ - $(top_srcdir)/include/usage.h - $(do_link.h) - -DEP_INCLUDES += include/usage_compressed.h - -include/usage_compressed.h: .config $(USAGE_BIN) \ - $(top_srcdir)/scripts/usage_compressed - $(Q)SED="$(SED)" $(SHELL) $(top_srcdir)/scripts/usage_compressed \ - "$(top_builddir)/scripts" > $@ -endif # CONFIG_FEATURE_COMPRESS_USAGE - -depend dep: .depend -.depend: scripts/bb_mkdep $(USAGE_BIN) $(DEP_INCLUDES) - $(disp_gen) - $(Q)rm -f .depend - $(Q)mkdir -p include/config - $(Q)scripts/bb_mkdep -I $(top_srcdir)/include $(top_srcdir) > $@.tmp - $(Q)mv $@.tmp $@ - -include/bb_config.h: .config - @if [ ! -x $(top_builddir)/scripts/config/conf ] ; then \ - $(MAKE) -C scripts/config conf; \ - fi; - @$(top_builddir)/scripts/config/conf -o $(CONFIG_CONFIG_IN) - -clean: - - $(MAKE) -C scripts/config $@ - - rm -f docs/busybox.dvi docs/busybox.ps \ - docs/busybox.pod docs/busybox.net/busybox.html \ - docs/busybox pod2htm* *.gdb *.elf *~ core .*config.log \ - docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html \ - docs/busybox.net/BusyBox.html busybox.links \ - libbusybox.so* \ - .config.old busybox busybox_unstripped \ - include/usage_compressed.h scripts/usage - - rm -r -f _install testsuite/links - - find . -name .\*.flags -o -name \*.o -o -name \*.om -o -name \*.syn \ - -o -name \*.os -o -name \*.osm -o -name \*.a | xargs rm -f - -distclean: clean - rm -f scripts/bb_mkdep scripts/usage - rm -r -f include/config include/config.h $(DEP_INCLUDES) - find . -name .depend'*' -print0 | xargs -0 rm -f - find . -name '*.rej' -print0 | xargs -0 rm -f - rm -f .hdepend busybox_old .config .config.old .config.cmd - -release: distclean #doc - cd ..; \ - rm -r -f $(PROG)-$(VERSION); \ - cp -a busybox $(PROG)-$(VERSION); \ - \ - find $(PROG)-$(VERSION)/ -type d \ - -name .svn \ - -print \ - -exec rm -r -f {} \; ; \ - \ - find $(PROG)-$(VERSION)/ -type f \ - -name .\#* \ - -print \ - -exec rm -f {} \; ; \ - \ - tar -cvzf $(PROG)-$(VERSION).tar.gz $(PROG)-$(VERSION)/; - -tags: - ctags -R . - -# documentation, cross-reference -# Modern distributions already ship synopsis packages (e.g. debian) -# If you have an old distribution go to http://synopsis.fresco.org/ -syn_tgt := $(wildcard $(patsubst %,%/*.c,$(SRC_DIRS))) -syn := $(patsubst %.c, %.syn, $(syn_tgt)) - -%.syn: %.c - synopsis -p C -l Comments.SSDFilter,Comments.Previous $(INCS) -Wp,verbose,debug,preprocess,cppflags="'$(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $(PROG_CFLAGS) $(PROG_LDFLAGS) $(CFLAGS_COMBINE) $(APPLETS_DEFINE) $(BUSYBOX_DEFINE)'" -o $@ $< -html: $(syn) - synopsis -f HTML -Wf,title="'BusyBox Documentation'" -o $@ $^ - - -endif # ifeq ($(skip-makefile),) +ifeq ($(ALLSOURCE_ARCHS),) +ifeq ($(ARCH),um) +ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) +else +ALLINCLUDE_ARCHS := $(ARCH) +endif +else +#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. +ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) +endif + +ALLSOURCE_ARCHS := $(ARCH) + +define all-sources + ( find $(__srctree) $(RCS_FIND_IGNORE) \ + \( -name include -o -name arch \) -prune -o \ + -name '*.[chS]' -print; \ + for ARCH in $(ALLSOURCE_ARCHS) ; do \ + find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + done ; \ + 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; \ + for ARCH in $(ALLINCLUDE_ARCHS) ; do \ + find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + done ; \ + find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print ) +endef + +quiet_cmd_cscope-file = FILELST cscope.files + cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files + +quiet_cmd_cscope = MAKE cscope.out + cmd_cscope = cscope -b + +cscope: FORCE + $(call cmd,cscope-file) + $(call cmd,cscope) + +quiet_cmd_TAGS = MAKE $@ +define cmd_TAGS + rm -f $@; \ + ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ + echo "-I __initdata,__exitdata,__acquires,__releases \ + -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ + --extra=+f --c-kinds=+px"`; \ + $(all-sources) | xargs etags $$ETAGSF -a +endef + +TAGS: FORCE + $(call cmd,TAGS) + + +quiet_cmd_tags = MAKE $@ +define cmd_tags + rm -f $@; \ + CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ + echo "-I __initdata,__exitdata,__acquires,__releases \ + -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ + --extra=+f --c-kinds=+px"`; \ + $(all-sources) | xargs ctags $$CTAGSF -a +endef + +tags: FORCE + $(call cmd,tags) + + +# Scripts to check various things for consistency +# --------------------------------------------------------------------------- + +includecheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkincludes.pl + +versioncheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkversion.pl + +namespacecheck: + $(PERL) $(srctree)/scripts/namespace.pl + +endif #ifeq ($(config-targets),1) +endif #ifeq ($(mixed-targets),1) + +PHONY += checkstack +checkstack: + $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ + $(PERL) $(src)/scripts/checkstack.pl $(ARCH) + +kernelrelease: + $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ + $(error kernelrelease not valid - run 'make *config' to update it)) +kernelversion: + @echo $(KERNELVERSION) + +# Single targets +# --------------------------------------------------------------------------- +# Single targets are compatible with: +# - build whith mixed source and output +# - build with separate output dir 'make O=...' +# - external modules +# +# target-dir => where to store outputfile +# build-dir => directory in kernel source tree to use + +ifeq ($(KBUILD_EXTMOD),) + build-dir = $(patsubst %/,%,$(dir $@)) + target-dir = $(dir $@) +else + zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) + build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) + target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) +endif + +%.s: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.i: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.o: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.lst: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.s: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.o: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) + +# Modules +/ %/: prepare scripts FORCE + $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ + $(build)=$(build-dir) +%.ko: prepare scripts FORCE + $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ + $(build)=$(build-dir) $(@:.ko=.o) + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + +# 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 + +# 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 + +endif # skip-makefile + +PHONY += FORCE +FORCE: + +-include Makefile.custom +# Declare the contents of the .PHONY variable as phony. We keep that +# information in a variable se we can use it in if_changed and friends. +.PHONY: $(PHONY) |