-# Makefile for busybox
+VERSION = 1
+PATCHLEVEL = 22
+SUBLEVEL = 1
+EXTRAVERSION =
+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 need to mess with anything beyond this point...
-#--------------------------------------------------------------
-noconfig_targets := menuconfig config oldconfig randconfig \
- defconfig allyesconfig allnoconfig clean distclean \
- release tags
+# To put more focus on warnings, be less verbose as default
+# Use 'make V=1' to see the full commands
-# the toplevel sourcedir
-ifndef top_srcdir
-top_srcdir=$(CURDIR)
+ifdef V
+ ifeq ("$(origin V)", "command line")
+ KBUILD_VERBOSE = $(V)
+ endif
endif
-# toplevel directory of the object-tree
-ifndef top_builddir
-top_builddir=$(CURDIR)
+ifndef KBUILD_VERBOSE
+ KBUILD_VERBOSE = 0
endif
-export srctree=$(top_srcdir)
-vpath %/Config.in $(srctree)
+# Call sparse as part of compilation of C files
+# Use 'make C=1' to enable sparse checking
-DIRS:=applets archival archival/libunarchive coreutils console-tools \
- debianutils editors findutils init miscutils modutils networking \
- networking/libiproute networking/udhcp procps loginutils shell \
- sysklogd util-linux e2fsprogs libpwdgrp coreutils/libcoreutils libbb
+ifdef C
+ ifeq ("$(origin C)", "command line")
+ KBUILD_CHECKSRC = $(C)
+ endif
+endif
+ifndef KBUILD_CHECKSRC
+ KBUILD_CHECKSRC = 0
+endif
-SRC_DIRS:=$(patsubst %,$(top_srcdir)/%,$(DIRS))
+# 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
-# That's our default target when none is given on the command line
-.PHONY: _all
-_all:
-CONFIG_CONFIG_IN = $(top_srcdir)/sysdeps/$(TARGET_OS)/Config.in
-CONFIG_DEFCONFIG = $(top_srcdir)/sysdeps/$(TARGET_OS)/defconfig
+# 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)
- top_builddir := $(O)
endif
-else
-# If no alternate output-dir was specified, we build in cwd
-# We are using KBUILD_OUTPUT nevertheless to make sure that we create
-# Rules.mak and the toplevel Makefile, in case they don't exist.
- KBUILD_OUTPUT := $(top_builddir)
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 "$@"
+# That's our default target when none is given on the command line
+PHONY := _all
+_all:
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
-# Check that the output directory actually exists
+# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
-$(if $(wildcard $(KBUILD_OUTPUT)),, \
+$(if $(KBUILD_OUTPUT),, \
$(error output directory "$(saved-output)" does not exist))
-.PHONY: $(MAKECMDGOALS)
-
-$(filter-out _all,$(MAKECMDGOALS)) _all: $(KBUILD_OUTPUT)/Rules.mak $(KBUILD_OUTPUT)/Makefile all_tree
- $(MAKE) -C $(KBUILD_OUTPUT) \
- top_srcdir=$(top_srcdir) \
- top_builddir=$(top_builddir) \
- KBUILD_SRC=$(top_srcdir) \
- PREFIX=$(PREFIX) \
- CROSS=$(CROSS) \
- -f $(CURDIR)/Makefile $@
-
-$(KBUILD_OUTPUT)/Rules.mak:
- @echo > $@
- @echo top_srcdir=$(top_srcdir) >> $@
- @echo top_builddir=$(KBUILD_OUTPUT) >> $@
- @echo include $(top_srcdir)/Rules.mak >> $@
-
-$(KBUILD_OUTPUT)/Makefile:
- @echo > $@
- @echo top_srcdir=$(top_srcdir) >> $@
- @echo top_builddir=$(KBUILD_OUTPUT) >> $@
- @echo KBUILD_SRC='$$(top_srcdir)' >> $@
- @echo include '$$(KBUILD_SRC)'/Makefile >> $@
+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),)
-# 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 $< $@
-
+# If building an external module we do not care about the all: rule
+# but instead _all depend on modules
+PHONY += all
+ifeq ($(KBUILD_EXTMOD),)
_all: all
+else
+_all: modules
+endif
-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
- @echo 'Configuration:'
- @echo ' allnoconfig - disable all symbols in .config'
- @echo ' allyesconfig - enable (almost) all symbols in .config'
- @echo ' config - text based configurator (of last resort).'
- @echo ' defconfig - set .config to defaults'
- @echo ' menuconfig - interactive curses-based configurator'
- @echo ' oldconfig - resolve any unresolved symbols in .config'
- @echo
- @echo 'Installation:'
- @echo ' install - install busybox and symlinks into $prefix'
- @echo ' install-hardlinks - install busybox and hardlinks into $prefix'
- @echo ' uninstall'
- @echo
- @echo 'Development:'
- @echo ' check - run the test suite for all applets'
- @echo ' randconfig - generate a random configuration'
- @echo ' release - create a distribution tarball'
- @echo ' sizes - show size of all enabled busybox symbols'
- @echo
+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))
-include $(top_srcdir)/Rules.mak
+export srctree objtree VPATH TOPDIR
-ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
-# Default target if none was requested explicitly
-all: menuconfig
+# 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 $(CROSS_COMPILE).
+# CROSS_COMPILE can be set on the command line
+# make CROSS_COMPILE=ia64-linux-
+# Alternatively CROSS_COMPILE can be set in the environment.
+# Default value for CROSS_COMPILE is not to prefix executables
+# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
+
+CROSS_COMPILE ?=
+# bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
+# and it has not been included yet... thus using an awkward syntax.
+ifeq ($(CROSS_COMPILE),)
+CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
+CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
+CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
+#")
+endif
-# 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
+# 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.
-# configuration
-# ---------------------------------------------------------------------------
+ifneq ($(CROSS_COMPILE),)
+SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
+else
+SUBARCH := $(shell uname -m)
+endif
+SUBARCH := $(shell echo $(SUBARCH) | 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/ )
-scripts/config/conf: scripts/config/Makefile
- $(MAKE) -C scripts/config conf
- -@if [ ! -f .config ] ; then \
- cp $(CONFIG_DEFCONFIG) .config; \
- fi
+ARCH ?= $(SUBARCH)
-scripts/config/mconf: scripts/config/Makefile
- $(MAKE) -C scripts/config ncurses conf mconf
- -@if [ ! -f .config ] ; then \
- cp $(CONFIG_DEFCONFIG) .config; \
- fi
+# 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)
+
+# 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
+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.
-menuconfig: scripts/config/mconf
- @./scripts/config/mconf $(CONFIG_CONFIG_IN)
+ifeq ($(KBUILD_VERBOSE),1)
+ quiet =
+ Q =
+else
+ quiet=quiet_
+ Q = @
+endif
-config: scripts/config/conf
- @./scripts/config/conf $(CONFIG_CONFIG_IN)
+# If the user is running make -s (silent mode), suppress echoing of
+# commands
-oldconfig: scripts/config/conf
- @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
+ifneq ($(findstring s,$(MAKEFLAGS)),)
+ quiet=silent_
+endif
-randconfig: scripts/config/conf
- @./scripts/config/conf -r $(CONFIG_CONFIG_IN)
+export quiet Q KBUILD_VERBOSE
+
+
+# Look for make include files relative to root of kernel src
+MAKEFLAGS += --include-dir=$(srctree)
+
+HOSTCC = gcc
+HOSTCXX = g++
+HOSTCFLAGS :=
+HOSTCXXFLAGS :=
+# We need some generic definitions
+include $(srctree)/scripts/Kbuild.include
+
+HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
+HOSTCXXFLAGS += -O2
+
+# For maximum performance (+ possibly random breakage, uncomment
+# the following)
+
+MAKEFLAGS += -rR
+
+# Make variables (CC, etc...)
+
+AS = $(CROSS_COMPILE)as
+CC = $(CROSS_COMPILE)gcc
+LD = $(CC) -nostdlib
+CPP = $(CC) -E
+AR = $(CROSS_COMPILE)ar
+NM = $(CROSS_COMPILE)nm
+STRIP = $(CROSS_COMPILE)strip
+OBJCOPY = $(CROSS_COMPILE)objcopy
+OBJDUMP = $(CROSS_COMPILE)objdump
+PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
+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 := $(CFLAGS)
+# Added only to final link stage of busybox binary
+CFLAGS_busybox := $(CFLAGS_busybox)
+CPPFLAGS := $(CPPFLAGS)
+AFLAGS := $(AFLAGS)
+LDFLAGS := $(LDFLAGS)
+LDLIBS :=
+
+# 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
+export FLTFLAGS
+
+# 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 ;
+
+# This target generates Kbuild's and Config.in's from *.c files
+PHONY += gen_build_files
+gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
+ $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
+
+# bbox: we have helpers in applets/
+# we depend on scripts_basic, since scripts/basic/fixdep
+# must be built before any other host prog
+PHONY += applets_dir
+applets_dir: scripts_basic gen_build_files
+ $(Q)$(MAKE) $(build)=applets
+
+applets/%: applets_dir ;
+
+PHONY += outputmakefile
+# outputmakefile generates a Makefile in the output directory, if using a
+# separate output directory. This allows convenient use of make in the
+# output directory.
+outputmakefile:
+ifneq ($(KBUILD_SRC),)
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
+ $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
+endif
-allyesconfig: scripts/config/conf
- @./scripts/config/conf -y $(CONFIG_CONFIG_IN)
- sed -i -r -e "s/^(CONFIG_DEBUG|USING_CROSS_COMPILER|CONFIG_STATIC|CONFIG_SELINUX).*/# \1 is not set/" .config
- @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
+# To make sure we do not include .config for any of the *config targets
+# catch them early, and hand them over to scripts/kconfig/Makefile
+# It is allowed to specify more targets when calling make, including
+# mixing *config targets and build targets.
+# For example 'make oldconfig all'.
+# Detect when mixed targets is specified, and make a second invocation
+# of make so .config is not included in this case either (for *config).
+
+no-dot-config-targets := clean mrproper distclean \
+ cscope TAGS tags help %docs
+#bbox# check% is removed from above
+
+config-targets := 0
+mixed-targets := 0
+dot-config := 1
+
+ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
+ ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
+ dot-config := 0
+ endif
+endif
-allnoconfig: scripts/config/conf
- @./scripts/config/conf -n $(CONFIG_CONFIG_IN)
+ifeq ($(KBUILD_EXTMOD),)
+ ifneq ($(filter config %config,$(MAKECMDGOALS)),)
+ config-targets := 1
+ ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
+ mixed-targets := 1
+ endif
+ endif
+endif
-defconfig: scripts/config/conf
- @./scripts/config/conf -d $(CONFIG_CONFIG_IN)
+ifeq ($(mixed-targets),1)
+# ===========================================================================
+# We're called with mixed targets (*config and build targets).
+# Handle them one by one.
-else # ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
+%:: FORCE
+ $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
-all: busybox busybox.links doc
+else
+ifeq ($(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 gen_build_files FORCE
+ $(Q)mkdir -p include
+ $(Q)$(MAKE) $(build)=scripts/kconfig $@
+ $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
+
+%config: scripts_basic outputmakefile gen_build_files FORCE
+ $(Q)mkdir -p include
+ $(Q)$(MAKE) $(build)=scripts/kconfig $@
+ $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
+else
+# ===========================================================================
+# Build targets only - this includes busybox, arch specific targets, clean
+# targets and others. In general all targets except *config targets.
+
+ifeq ($(KBUILD_EXTMOD),)
+# Additional helpers built in scripts/
+# Carefully list dependencies so we do not try to build scripts twice
+# in parallel
+PHONY += scripts
+scripts: gen_build_files 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/libarchive/ \
+ console-tools/ \
+ coreutils/ \
+ coreutils/libcoreutils/ \
+ debianutils/ \
+ e2fsprogs/ \
+ editors/ \
+ findutils/ \
+ init/ \
+ libbb/ \
+ libpwdgrp/ \
+ loginutils/ \
+ mailutils/ \
+ miscutils/ \
+ modutils/ \
+ networking/ \
+ networking/libiproute/ \
+ networking/udhcp/ \
+ printutils/ \
+ procps/ \
+ runit/ \
+ selinux/ \
+ shell/ \
+ sysklogd/ \
+ util-linux/ \
+ util-linux/volume_id/ \
+
+endif # KBUILD_EXTMOD
+
+ifeq ($(dot-config),1)
# In this section, we need .config
--include $(top_builddir)/.config.cmd
-include $(patsubst %,%/Makefile.in, $(SRC_DIRS))
--include $(top_builddir)/.depend
-endif # ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
+# Read in dependencies to all Kconfig* files, make sure to run
+# oldconfig if changes are detected.
+-include .kconfig.d
-busybox: .depend $(libraries-y)
- $(CC) $(EXTRA_CFLAGS) $(LDFLAGS) -o $@ -Wl,--start-group $(libraries-y) $(LIBRARIES) -Wl,--end-group
- $(STRIPCMD) $@
+-include .config
-busybox.links: $(top_srcdir)/applets/busybox.mkll include/config.h $(top_srcdir)/include/applets.h
- - $(SHELL) $^ >$@
+# 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: ;
-install: $(top_srcdir)/applets/install.sh busybox busybox.links
- $(SHELL) $< $(PREFIX)
-ifeq ($(strip $(CONFIG_FEATURE_SUID)),y)
- @echo
+# Now we can define CFLAGS etc according to .config
+include $(srctree)/Makefile.flags
+
+# 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 $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
+ $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
+
+include/usage.h: gen_build_files
+
+else
+# Dummy target needed, because used as prerequisite
+include/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 busybox but it is usually overridden in the arch makefile
+all: busybox doc
+
+-include $(srctree)/arch/$(ARCH)/Makefile
+
+# 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 += $(NOSTDINC_FLAGS)
+
+# Default kernel image to build when no specific target is given.
+# KBUILD_IMAGE may be overruled on the commandline or
+# set in the environment
+# Also any assignments in arch/$(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)
+
+# 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__ ?= $(srctree)/scripts/trylink \
+ "$@" \
+ "$(CC)" \
+ "$(CFLAGS) $(CFLAGS_busybox)" \
+ "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
+ "$(core-y)" \
+ "$(libs-y)" \
+ "$(LDLIBS)"
+
+# 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 $(kallsyms.o)
+# It's a three stage process:
+# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
+# empty
+# Running kallsyms on that gives us .tmp_kallsyms1.o with
+# the right size - busybox version (uname -v) is updated during this step
+# o .tmp_busybox2 now has a __kallsyms section of the right size,
+# but due to the added section, some addresses have shifted.
+# From here, we generate a correct .tmp_kallsyms2.o
+# o The correct .tmp_kallsyms2.o is linked into the final busybox.
+# o Verify that the System.map from busybox matches the map from
+# .tmp_busybox2, just in case we did not generate kallsyms correctly.
+# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
+# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
+# temporary bypass to allow the kernel to be built while the
+# maintainers work out what went wrong with kallsyms.
+
+ifdef CONFIG_KALLSYMS_EXTRA_PASS
+last_kallsyms := 3
+else
+last_kallsyms := 2
+endif
+
+kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
+
+define verify_kallsyms
+ $(Q)$(if $($(quiet)cmd_sysmap), \
+ echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
+ $(cmd_sysmap) .tmp_busybox$(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
+
+# 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
+
+# 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_busybox% $(KALLSYMS)
+ $(call cmd,kallsyms)
+
+# .tmp_busybox1 must be complete except kallsyms, so update busybox version
+.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
+ $(call if_changed_rule,ksym_ld)
+
+.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
+ $(call if_changed,busybox__)
+
+.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
+ $(call if_changed,busybox__)
+
+# Needs to visit scripts/ before $(KALLSYMS) can be used.
+$(KALLSYMS): scripts ;
+
+# Generate some data for debugging strange kallsyms problems
+debug_kallsyms: .tmp_map$(last_kallsyms)
+
+.tmp_map%: .tmp_busybox% FORCE
+ ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
+
+.tmp_map3: .tmp_map2
+
+.tmp_map2: .tmp_map1
+
+endif # ifdef CONFIG_KALLSYMS
+
+# busybox image - including updated kernel symbols
+busybox_unstripped: $(busybox-all) FORCE
+ $(call if_changed_rule,busybox__)
+ $(Q)rm -f .old_version
+
+busybox: busybox_unstripped
+ifeq ($(SKIP_STRIP),y)
+ $(Q)cp $< $@
+else
+ $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
+ busybox_unstripped -o $@
+# strip is confused by PIE executable and does not set exec bits
+ $(Q)chmod a+x $@
+endif
+
+# The actual objects are generated when descending,
+# make sure no implicit rule kicks in
+$(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 _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
+ _localver-auto = $(shell $(CONFIG_SHELL) \
+ $(srctree)/scripts/setlocalversion $(srctree))
+ localver-auto = $(LOCALVERSION)$(_localver-auto)
+endif
+
+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 busybox'
+ $(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
+
+# 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
+
+archprepare: prepare1 scripts_basic applets_dir
+
+prepare0: archprepare FORCE
+ $(Q)$(MAKE) $(build)=.
+
+# All the preparing..
+prepare prepare-all: prepare0
+
+# Leave this as default for preprocessing busybox.lds.S, which is now
+# done in arch/$(ARCH)/kernel/Makefile
+
+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/*
+quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h
+ cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
+quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/*
+ cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config
+#bbox# piggybacked generation of few .h files
+include/config/MARKER: scripts/basic/split-include include/autoconf.h
+ $(call cmd,split_autoconf)
+ $(call cmd,gen_bbconfigopts)
+ @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 _BB_DISABLED_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 busybox 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
+endif # CONFIG_MODULES
+
+###
+# 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) _install 0_lib
+CLEAN_FILES += busybox busybox_unstripped* busybox.links \
+ System.map .kernelrelease \
+ .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/NUM_APPLETS.h \
+ include/autoconf.h \
+ include/bbconfigopts.h \
+ include/bbconfigopts_bz2.h \
+ include/usage_compressed.h \
+ include/applet_tables.h \
+ include/applets.h \
+ include/usage.h \
+ applets/usage \
+ .kernelrelease Module.symvers tags TAGS cscope* \
+ busybox_old
+
+# 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
+
+PHONY += doc-clean
+doc-clean: rm-files := docs/busybox.pod \
+ docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
+doc-clean:
+ $(call cmd,rmfiles)
+
+# mrproper - Delete all generated files, including .config
+#
+mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
+mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
+mrproper-dirs := $(addprefix _mrproper_,scripts)
-install-hardlinks: $(top_srcdir)/applets/install.sh busybox busybox.links
- $(SHELL) $< $(PREFIX) --hardlinks
+PHONY += $(mrproper-dirs) mrproper archmrproper
+$(mrproper-dirs):
+ $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
-# see if we are in verbose mode
-KBUILD_VERBOSE :=
-ifdef V
- ifeq ("$(origin V)", "command line")
- KBUILD_VERBOSE := $(V)
- endif
+mrproper: clean archmrproper $(mrproper-dirs)
+ $(call cmd,rmdirs)
+ $(call cmd,rmfiles)
+ @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
+ @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
+
+# distclean
+#
+PHONY += distclean
+
+distclean: mrproper
+ @find $(srctree) $(RCS_FIND_IGNORE) \
+ \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
+ -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
+ -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
+ -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
+ -type f -print | xargs rm -f
+
+
+# Packaging of the kernel to various formats
+# ---------------------------------------------------------------------------
+# rpm target kept for backward compatibility
+package-dir := $(srctree)/scripts/package
+
+%pkg: FORCE
+ $(Q)$(MAKE) $(build)=$(package-dir) $@
+rpm: FORCE
+ $(Q)$(MAKE) $(build)=$(package-dir) $@
+
+
+# Brief documentation of the typical targets used
+# ---------------------------------------------------------------------------
+
+boards := $(wildcard $(srctree)/configs/*_defconfig)
+boards := $(notdir $(boards))
+
+-include $(srctree)/Makefile.help
+
+# 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
+
+# Dummies...
+PHONY += prepare scripts
+prepare: ;
+scripts: ;
+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 $(srctree) adds about 20M on i386 to the size of the output file!
+
+ifeq ($(src),$(obj))
+__srctree =
+else
+__srctree = $(srctree)/
endif
-ifneq ($(strip $(KBUILD_VERBOSE)),)
- CHECK_VERBOSE := -v
+
+ifeq ($(ALLSOURCE_ARCHS),)
+ifeq ($(ARCH),um)
+ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
+else
+ALLINCLUDE_ARCHS := $(ARCH)
endif
-check test: busybox
- bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite \
- $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
-
-sizes:
- -rm -f busybox
- $(MAKE) top_srcdir=$(top_srcdir) top_builddir=$(top_builddir) \
- -f $(top_srcdir)/Makefile STRIPCMD=/bin/true
- nm --size-sort busybox
-
-# Documentation Targets
-doc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html
-
-docs/busybox.pod : $(top_srcdir)/docs/busybox_header.pod $(top_srcdir)/include/usage.h $(top_srcdir)/docs/busybox_footer.pod
- -mkdir -p docs
- - ( 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
-
-docs/BusyBox.txt: docs/busybox.pod
- $(SECHO)
- $(SECHO) BusyBox Documentation
- $(SECHO)
- -mkdir -p docs
- -pod2text $< > $@
-
-docs/BusyBox.1: docs/busybox.pod
- - mkdir -p docs
- - pod2man --center=BusyBox --release="version $(VERSION)" \
- $< > $@
-
-docs/BusyBox.html: docs/busybox.net/BusyBox.html
- - mkdir -p docs
- -@ rm -f docs/BusyBox.html
- -@ cp docs/busybox.net/BusyBox.html docs/BusyBox.html
-
-docs/busybox.net/BusyBox.html: docs/busybox.pod
- -@ mkdir -p docs/busybox.net
- - pod2html --noindex $< > \
- docs/busybox.net/BusyBox.html
- -@ rm -f pod2htm*
-
-# The nifty new buildsystem stuff
-scripts/bb_mkdep: $(top_srcdir)/scripts/bb_mkdep.c
- $(HOSTCC) $(HOSTCFLAGS) -o $@ $<
-
-DEP_INCLUDES := include/config.h include/bb_config.h
-
-ifeq ($(strip $(CONFIG_BBCONFIG)),y)
-DEP_INCLUDES += include/bbconfigopts.h
-
-include/bbconfigopts.h: .config
- $(top_srcdir)/scripts/config/mkconfigs > $@
+else
+#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
+ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
endif
-depend dep $(top_builddir)/.depend: .depend
-.depend: scripts/bb_mkdep $(DEP_INCLUDES)
- @rm -f .depend
- @mkdir -p include/config
- scripts/bb_mkdep -c include/config.h -c include/bb_config.h -I $(top_srcdir)/include $(top_srcdir)/ > $@.tmp
- mv $@.tmp $@
+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
+# ---------------------------------------------------------------------------
-include/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)
-
-include/bb_config.h: include/config.h
- @echo -e "#ifndef BB_CONFIG_H\n#define BB_CONFIG_H" > $@
- @sed -e 's/#undef CONFIG_\(.*\)/#define ENABLE_\1 0/' \
- -e 's/#define CONFIG_\(.*\)/#define CONFIG_\1\n#define ENABLE_\1/' \
- < $< >> $@
- @echo "#endif" >> $@
-
-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 libbb/loop.h \
- .config.old busybox
- - rm -rf _install testsuite/links
- - find . -name .\*.flags -exec rm -f {} \;
- - find . -name \*.o -exec rm -f {} \;
- - find . -name \*.a -exec rm -f {} \;
-
-distclean: clean
- - rm -f scripts/bb_mkdep
- - rm -rf include/config include/config.h include/bb_config.h include/bbconfigopts.h
- - find . -name .depend -exec rm -f {} \;
- rm -f .config .config.old .config.cmd
-
-release: distclean #doc
- cd ..; \
- rm -rf $(PROG)-$(VERSION); \
- cp -a busybox $(PROG)-$(VERSION); \
- \
- find $(PROG)-$(VERSION)/ -type d \
- -name .svn \
- -print \
- -exec rm -rf {} \; ; \
- \
- find $(PROG)-$(VERSION)/ -type f \
- -name .\#* \
- -print \
- -exec rm -f {} \; ; \
- \
- tar -cvzf $(PROG)-$(VERSION).tar.gz $(PROG)-$(VERSION)/;
-
-tags:
- ctags -R .
-
-
-endif # ifeq ($(skip-makefile),)
-
-.PHONY: dummy subdirs release distclean clean config oldconfig \
- menuconfig tags check test depend buildtree
+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)
+/: 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 $(srctree)/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)
projects / platform / upstream / busybox.git / blobdiff