-# Makefile for busybox
+VERSION = 1
+PATCHLEVEL = 2
+SUBLEVEL = 2
+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) 1999,2000,2001 Erik Andersen <andersee@debian.org>
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+# 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.
+
+# To put more focus on warnings, be less verbose as default
+# Use 'make V=1' to see the full commands
+
+ifdef V
+ ifeq ("$(origin V)", "command line")
+ KBUILD_VERBOSE = $(V)
+ endif
+endif
+ifndef KBUILD_VERBOSE
+ KBUILD_VERBOSE = 0
+endif
-PROG := busybox
-VERSION := 0.53pre
-BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
-export VERSION
-
-# With a modern GNU make(1) (highly recommended, that's what all the
-# developers use), all of the following configuration values can be
-# overridden at the command line. For example:
-# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
-
-# If you want to add some simple compiler switches (like -march=i686),
-# especially from the command line, use this instead of CFLAGS directly.
-# For optimization overrides, it's better still to set OPTIMIZATION.
-CFLAGS_EXTRA =
-
-# If you want a static binary, turn this on.
-DOSTATIC = false
-
-# Set the following to `true' to make a debuggable build.
-# Leave this set to `false' for production use.
-DODEBUG = false
-
-# Setting this to `true' will cause busybox to directly use the system's
-# password and group functions. Assuming you use GNU libc, when this is
-# `true', you will need to install the /etc/nsswitch.conf configuration file
-# and the required libnss_* libraries. This generally makes your embedded
-# system quite a bit larger... If you leave this off, busybox will directly use
-# the /etc/password, /etc/group files (and your system will be smaller, and I
-# will get fewer emails asking about how glibc NSS works). Enabling this adds
-# just 1.4k to the binary size (which is a _lot_ less then glibc NSS costs).
-# Note that if you want hostname resolution to work with glibc, you still need
-# the libnss_* libraries. Most people will want to leave this set to false.
-USE_SYSTEM_PWD_GRP = true
-
-# This enables compiling with dmalloc ( http://dmalloc.com/ )
-# which is an excellent public domain mem leak and malloc problem
-# detector. To enable dmalloc, before running busybox you will
-# want to first set up your environment.
-# eg: `export DMALLOC_OPTIONS=debug=0x14f47d83,inter=100,log=logfile`
-# Do not enable this for production builds...
-DODMALLOC = false
-
-# Electric-fence is another very useful malloc debugging library.
-# Do not enable this for production builds...
-DOEFENCE = false
-
-# If you want large file summit support, turn this on.
-# This has no effect if you don't have a kernel with lfs
-# support, and a system with libc-2.1.3 or later.
-# Some of the programs that can benefit from lfs support
-# are dd, gzip, mount, tar, and mkfs_minix.
-# LFS allows you to use the above programs for files
-# larger than 2GB!
-DOLFS = false
-
-# If you have a "pristine" source directory, point BB_SRC_DIR to it.
-# Experimental and incomplete; tell the mailing list
-# <busybox@opensource.lineo.com> if you do or don't like it so far.
-BB_SRC_DIR =
-
-# If you are running a cross compiler, you may want to set this
-# to something more interesting, like "powerpc-linux-".
-CROSS =
-CC = $(CROSS)gcc
-AR = $(CROSS)ar
-STRIPTOOL = $(CROSS)strip
-
-# To compile vs uClibc, just use the compiler wrapper built by uClibc...
-# This make things very easy? Everything should compile and work as
-# expected these days...
-#CC = ../uClibc/extra/gcc-uClibc/i386-uclibc-gcc
-
-# To compile vs some other alternative libc, you may need to use/adjust
-# the following lines to meet your needs...
-#
-# If you are using Red Hat 6.x with the compatible RPMs (for developing under
-# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
-# using the compatible RPMs (compat-*) at http://www.redhat.com !
-#LIBCDIR=/usr/i386-glibc20-linux
-#
-# The following is used for libc5 (if you install altgcc and libc5-altdev
-# on a Debian system).
-#LIBCDIR=/usr/i486-linuxlibc1
-#
-# For other libraries, you are on your own...
-#LDFLAGS+=-nostdlib
-#LIBRARIES = $(LIBCDIR)/lib/libc.a -lgcc
-#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
-#GCCINCDIR = $(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
+# Call sparse as part of compilation of C files
+# Use 'make C=1' to enable sparse checking
-# use '-Os' optimization if available, else use -O2
-OPTIMIZATION := $(shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
- then echo "-Os"; else echo "-O2" ; fi)
+ifdef C
+ ifeq ("$(origin C)", "command line")
+ KBUILD_CHECKSRC = $(C)
+ endif
+endif
+ifndef KBUILD_CHECKSRC
+ KBUILD_CHECKSRC = 0
+endif
-WARNINGS = -Wall -Wshadow
+# Use make M=dir to specify directory of external module to build
+# Old syntax make ... SUBDIRS=$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 := $(M)
+ endif
+endif
-ARFLAGS = -r
-#
-#--------------------------------------------------------
-# If you're going to do a lot of builds with a non-vanilla configuration,
-# it makes sense to adjust parameters above, so you can type "make"
-# by itself, instead of following it by the same half-dozen overrides
-# every time. The stuff below, on the other hand, is probably less
-# prone to casual user adjustment.
+# kbuild supports saving output files in a separate directory.
+# To locate output files in a separate directory two syntaxes are supported.
+# In both cases the working directory must be the root of the kernel src.
+# 1) O=
+# Use "make O=dir/to/store/output/files/"
#
+# 2) Set KBUILD_OUTPUT
+# Set the environment variable KBUILD_OUTPUT to point to the directory
+# where the output files shall be placed.
+# export KBUILD_OUTPUT=dir/to/store/output/files/
+# make
+#
+# The O= assignment takes precedence over the KBUILD_OUTPUT environment
+# variable.
+
-ifeq ($(strip $(DOLFS)),true)
- # For large file summit support
- CFLAGS+=-D_FILE_OFFSET_BITS=64
+# KBUILD_SRC is set on invocation of make in OBJ directory
+# KBUILD_SRC is not intended to be used by the regular user (for now)
+ifeq ($(KBUILD_SRC),)
+
+# OK, Make called in directory where kernel src resides
+# Do we want to locate output files in a separate directory?
+ifdef O
+ ifeq ("$(origin O)", "command line")
+ KBUILD_OUTPUT := $(O)
+ endif
endif
-ifeq ($(strip $(DODMALLOC)),true)
- # For testing mem leaks with dmalloc
- CFLAGS+=-DDMALLOC
- LIBRARIES = -ldmalloc
- # Force debug=true, since this is useless when not debugging...
- DODEBUG = true
+
+# That's our default target when none is given on the command line
+PHONY := _all
+_all:
+
+ifneq ($(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 ($(KBUILD_EXTMOD),)
+_all: all
else
- ifeq ($(strip $(DOEFENCE)),true)
- LIBRARIES = -lefence
- # Force debug=true, since this is useless when not debugging...
- DODEBUG = true
- endif
+_all: modules
endif
-ifeq ($(strip $(DODEBUG)),true)
- CFLAGS += $(WARNINGS) -g -D_GNU_SOURCE
- LDFLAGS += -Wl,-warn-common
- STRIP =
-else
- CFLAGS += $(WARNINGS) $(OPTIMIZATION) -fomit-frame-pointer -D_GNU_SOURCE
- LDFLAGS += -s -Wl,-warn-common
- STRIP = $(STRIPTOOL) --remove-section=.note --remove-section=.comment $(PROG)
+
+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 $(CONFIG_MODVERSIONS),1)
endif
-ifeq ($(strip $(DOSTATIC)),true)
- LDFLAGS += --static
- #
- #use '-ffunction-sections -fdata-sections' and '--gc-sections' (if they
- # work) to try and strip out any unused junk. Doesn't do much for me,
- # but you may want to give it a shot...
- #
- #ifeq ($(shell $(CC) -ffunction-sections -fdata-sections -S \
- # -o /dev/null -xc /dev/null 2>/dev/null && $(LD) \
- # --gc-sections -v >/dev/null && echo 1),1)
- # CFLAGS += -ffunction-sections -fdata-sections
- # LDFLAGS += --gc-sections
- #endif
+
+# If we have "make <whatever> modules", compile modules
+# in addition to whatever we do anyway.
+# Just "make" or "make all" shall build modules as well
+
+ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
+ KBUILD_MODULES := 1
endif
-ifndef $(PREFIX)
- PREFIX = `pwd`/_install
+ifeq ($(MAKECMDGOALS),)
+ KBUILD_MODULES := 1
endif
-# Additional complications due to support for pristine source dir.
-# Include files in the build directory should take precedence over
-# the copy in BB_SRC_DIR, both during the compilation phase and the
-# shell script that finds the list of object files.
-# Work in progress by <ldoolitt@recycle.lbl.gov>.
+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 $(Q) - that's useful
+# for commands that shall be hidden in non-verbose mode.
#
-ifneq ($(strip $(BB_SRC_DIR)),)
- VPATH = $(BB_SRC_DIR)
+# $(Q)ln $@ :<
+#
+# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
+# If KBUILD_VERBOSE equals 1 then the above command is displayed.
+
+ifeq ($(KBUILD_VERBOSE),1)
+ quiet =
+ Q =
+else
+ quiet=quiet_
+ Q = @
+endif
+
+# If the user is running make -s (silent mode), suppress echoing of
+# commands
+
+ifneq ($(findstring s,$(MAKEFLAGS)),)
+ quiet=silent_
+endif
+
+export quiet Q KBUILD_VERBOSE
+
+
+# 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 :=
+
+# 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) $(PATCHLEVEL)
+endif
+
+# To make sure we do not include .config for any of the *config targets
+# catch them early, and hand them over to scripts/kconfig/Makefile
+# It is allowed to specify more targets when calling make, including
+# mixing *config targets and build targets.
+# For example 'make oldconfig all'.
+# Detect when mixed targets is specified, and make a second invocation
+# of make so .config is not included in this case either (for *config).
+
+no-dot-config-targets := clean mrproper distclean \
+ cscope TAGS tags help %docs check%
+
+config-targets := 0
+mixed-targets := 0
+dot-config := 1
+
+ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
+ ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
+ dot-config := 0
+ endif
+endif
+
+ifeq ($(KBUILD_EXTMOD),)
+ ifneq ($(filter config %config,$(MAKECMDGOALS)),)
+ config-targets := 1
+ ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
+ mixed-targets := 1
+ endif
+ endif
+endif
+
+ifeq ($(mixed-targets),1)
+# ===========================================================================
+# We're called with mixed targets (*config and build targets).
+# Handle them one by one.
+
+%:: FORCE
+ $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
+
+else
+ifeq ($(config-targets),1)
+# ===========================================================================
+# *config targets only - make sure prerequisites are updated, and descend
+# in scripts/kconfig to make the *config target
+
+# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
+# KBUILD_DEFCONFIG may point out an alternative default configuration
+# used for 'make defconfig'
+-include $(srctree)/arch/$(ARCH)/Makefile
+export KBUILD_DEFCONFIG
+
+config %config: scripts_basic outputmakefile 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 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
+
+# Read in dependencies to all Kconfig* files, make sure to run
+# oldconfig if changes are detected.
+-include .kconfig.d
+
+-include .config
+
+# If .config needs to be updated, it will be done via the dependency
+# that autoconf has on .config.
+# To avoid any implicit rule to kick in, define an empty command
+.config .kconfig.d: ;
+
+# 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
+ $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
+
+else
+# Dummy target needed, because used as prerequisite
+include/autoconf.h: ;
endif
-#ifneq ($(strip $(VPATH)),)
-# CFLAGS += -I- -I. $(patsubst %,-I%,$(subst :, ,$(VPATH)))
-#endif
-
-# We need to set APPLET_SOURCES to something like
-# $(shell busybox.sh Config.h)
-# but in a manner that works with VPATH and BB_SRC_DIR.
-# Possible ways to approach this:
+
+# 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
+
+-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)
+
+# 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
+
#
-# 1. Explicitly search through .:$(VPATH) for busybox.sh and config.h,
-# then $(shell $(BUSYBOX_SH) $(CONFIG_H) $(BB_SRC_DIR))
+# INSTALL_PATH specifies where to place the updated kernel and system map
+# images. Default is /boot, but you can set it to other values
+export INSTALL_PATH ?= /boot
+
#
-# 2. Explicity search through .:$(VPATH) for slist.mk,
-# then $(shell $(MAKE) -f $(SLIST_MK) VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR))
+# 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.
#
-# 3. Create slist.mk in this directory, with commands embedded in
-# a $(shell ...) command, and $(MAKE) it immediately.
+
+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.
#
-# 4. Use a real rule within this makefile to create a file that sets
-# APPLET_SOURCE_LIST, then include that file. Has complications
-# with the first trip through the makefile (before processing the
-# include) trying to do too much, and a spurious warning the first
-# time make is run.
+# 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)
#
-# This is option 3:
+# 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.
#
-#APPLET_SOURCES = $(shell \
-# echo -e 'all: busybox.sh Config.h\n\t@ $$(SHELL) $$^ $$(BB_SRC_DIR)' >slist.mk; \
-# make -f slist.mk VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR) \
-#)
-# And option 4:
--include applet_source_list
-
-OBJECTS = $(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
-CFLAGS += $(CROSS_CFLAGS)
-CFLAGS += -DBB_VER='"$(VERSION)"'
-CFLAGS += -DBB_BT='"$(BUILDTIME)"'
-ifdef BB_INIT_SCRIPT
- CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
+# 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 $@
+ifdef CONFIG_STATIC
+ cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) \
+ -static \
+ -o $@ \
+ -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
+ -Wl,--start-group $(busybox-all) -Wl,--end-group
+else
+ cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) -o $@ \
+ -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
+ -Wl,--start-group $(busybox-all) -Wl,--end-group
endif
-ifneq ($(strip $(USE_SYSTEM_PWD_GRP)),true)
- PWD_GRP = pwd_grp
- PWD_GRP_DIR = $(BB_SRC_DIR:=/)$(PWD_GRP)
- PWD_LIB = libpwd.a
- PWD_CSRC=__getpwent.c pwent.c getpwnam.c getpwuid.c putpwent.c getpw.c \
- fgetpwent.c __getgrent.c grent.c getgrnam.c getgrgid.c fgetgrent.c \
- initgroups.c setgroups.c
- PWD_OBJS=$(patsubst %.c,$(PWD_GRP)/%.o, $(PWD_CSRC))
- PWD_CFLAGS = -I$(PWD_GRP_DIR)
+# 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
- CFLAGS += -DUSE_SYSTEM_PWD_GRP
-endif
-
-LIBBB = libbb
-LIBBB_LIB = libbb.a
-LIBBB_CSRC= ask_confirmation.c chomp.c concat_path_file.c copy_file.c \
-copy_file_chunk.c daemon.c device_open.c error_msg.c \
-error_msg_and_die.c fgets_str.c find_mount_point.c find_pid_by_name.c \
-find_root_device.c full_read.c full_write.c get_console.c \
-get_last_path_component.c get_line_from_file.c gz_open.c human_readable.c \
-isdirectory.c kernel_version.c loop.c mode_string.c module_syscalls.c mtab.c \
-mtab_file.c my_getgrnam.c my_getgrgid.c my_getpwnam.c my_getpwnamegid.c \
-my_getpwuid.c parse_mode.c parse_number.c perror_msg.c perror_msg_and_die.c \
-print_file.c process_escape_sequence.c read_package_field.c recursive_action.c \
-safe_read.c safe_strncpy.c syscalls.c syslog_msg_with_name.c time_string.c \
-trim.c unzip.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c xfuncs.c \
-xgetcwd.c xreadlink.c xregcomp.c interface.c remove_file.c last_char_is.c \
-copyfd.c vherror_msg.c herror_msg.c herror_msg_and_die.c xgethostbyname.c \
-dirname.c make_directory.c create_icmp_socket.c u_signal_names.c arith.c
-LIBBB_OBJS=$(patsubst %.c,$(LIBBB)/%.o, $(LIBBB_CSRC))
-LIBBB_CFLAGS = -I$(LIBBB)
-ifneq ($(strip $(BB_SRC_DIR)),)
- LIBBB_CFLAGS += -I$(BB_SRC_DIR)/$(LIBBB)
+last_kallsyms := 2
endif
-LIBBB_MSRC=libbb/messages.c
-LIBBB_MESSAGES= full_version name_too_long omitting_directory not_a_directory \
-memory_exhausted invalid_date invalid_option io_error dash_dash_help \
-write_error too_few_args name_longer_than_foo unknown can_not_create_raw_socket
-LIBBB_MOBJ=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_MESSAGES))
+kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
-LIBBB_ARCSRC=libbb/unarchive.c
-LIBBB_ARCOBJ= archive_offset seek_sub_file extract_archive unarchive \
-get_header_ar get_header_cpio get_header_tar deb_extract
-LIBBB_AROBJS=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_ARCOBJ))
+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
-# Put user-supplied flags at the end, where they
-# have a chance of winning.
-CFLAGS += $(CFLAGS_EXTRA)
+# Generate .S file with all kernel symbols
+quiet_cmd_kallsyms = KSYM $@
+ cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
+ $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
-.EXPORT_ALL_VARIABLES:
+.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
+ $(call if_changed_dep,as_o_S)
-all: applet_source_list busybox busybox.links doc
+.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
+ $(call cmd,kallsyms)
-applet_source_list: busybox.sh Config.h
- (echo -n "APPLET_SOURCES := "; BB_SRC_DIR=$(BB_SRC_DIR) $(SHELL) $^) > $@
+# .tmp_busybox1 must be complete except kallsyms, so update busybox version
+.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
+ $(call if_changed_rule,ksym_ld)
-doc: olddoc
+.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
+ $(call if_changed,busybox__)
-# Old Docs...
-olddoc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html
+.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
+ $(call if_changed,busybox__)
-docs/busybox.pod : docs/busybox_header.pod usage.h docs/busybox_footer.pod
- - ( cat docs/busybox_header.pod; \
- docs/autodocifier.pl usage.h; \
- cat docs/busybox_footer.pod ) > docs/busybox.pod
+# Needs to visit scripts/ before $(KALLSYMS) can be used.
+$(KALLSYMS): scripts ;
-docs/BusyBox.txt: docs/busybox.pod
- @echo
- @echo BusyBox Documentation
- @echo
- -mkdir -p docs
- -pod2text $< > $@
+# 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
+ $(Q)$(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
-docs/BusyBox.1: docs/busybox.pod
- - mkdir -p docs
- - pod2man --center=BusyBox --release="version $(VERSION)" \
- $< > $@
+PHONY += $(busybox-dirs)
+$(busybox-dirs): prepare scripts
+ $(Q)$(MAKE) $(build)=$@
-docs/BusyBox.html: docs/busybox.lineo.com/BusyBox.html
- - mkdir -p docs
- -@ rm -f docs/BusyBox.html
- -@ ln -s busybox.lineo.com/BusyBox.html docs/BusyBox.html
+# 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
+
+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
+
+# 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
-docs/busybox.lineo.com/BusyBox.html: docs/busybox.pod
- -@ mkdir -p docs/busybox.lineo.com
- - pod2html --noindex $< > \
- docs/busybox.lineo.com/BusyBox.html
- -@ rm -f pod2htm*
+archprepare: prepare1 scripts_basic
+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) $@
+
+# Split autoconf.h into include/linux/config/*
+#bbox# piggybacked generation of few .h files
+include/config/MARKER: scripts/basic/split-include include/autoconf.h
+ @echo ' SPLIT include/autoconf.h -> include/config/*'
+ @scripts/basic/split-include include/autoconf.h include/config
+ @echo ' GEN include/bbconfigopts.h'
+ @$(srctree)/scripts/mkconfigs >include/bbconfigopts.h
+ @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
-# New docs based on DOCBOOK SGML
-newdoc: docs/busybox.txt docs/busybox.pdf docs/busybox/busyboxdocumentation.html
+else # CONFIG_MODULES
-docs/busybox.txt: docs/busybox.sgml
+# Modules not configured
+# ---------------------------------------------------------------------------
+
+modules modules_install: FORCE
@echo
- @echo BusyBox Documentation
+ @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
- - mkdir -p docs
- (cd docs; sgmltools -b txt busybox.sgml)
-
-docs/busybox.dvi: docs/busybox.sgml
- - mkdir -p docs
- (cd docs; sgmltools -b dvi busybox.sgml)
-
-docs/busybox.ps: docs/busybox.sgml
- - mkdir -p docs
- (cd docs; sgmltools -b ps busybox.sgml)
-
-docs/busybox.pdf: docs/busybox.ps
- - mkdir -p docs
- (cd docs; ps2pdf busybox.ps)
-
-docs/busybox/busyboxdocumentation.html: docs/busybox.sgml
- - mkdir -p docs
- (cd docs/busybox.lineo.com; sgmltools -b html ../busybox.sgml)
-
-
-busybox: $(PWD_LIB) $(LIBBB_LIB) $(OBJECTS)
- $(CC) $(LDFLAGS) -o $@ $(OBJECTS) $(LIBBB_LIB) $(PWD_LIB) $(LIBRARIES)
- $(STRIP)
-
-# Without VPATH, rule expands to "/bin/sh busybox.mkll Config.h applets.h"
-# but with VPATH, some or all of those file names are resolved to the
-# directories in which they live.
-busybox.links: busybox.mkll Config.h applets.h
- - $(SHELL) $^ >$@
-
-nfsmount.o cmdedit.o: %.o: %.h
-ash.o hush.o lash.o msh.o: cmdedit.h
-$(OBJECTS): %.o: %.c Config.h busybox.h applets.h Makefile
- $(CC) $(CFLAGS) -I. $(patsubst %,-I%,$(subst :, ,$(BB_SRC_DIR))) -c $< -o $*.o
-
-$(PWD_OBJS): %.o: %.c Config.h busybox.h applets.h Makefile
- - mkdir -p $(PWD_GRP)
- $(CC) $(CFLAGS) $(PWD_CFLAGS) -c $< -o $*.o
-
-$(LIBBB_OBJS): %.o: %.c Config.h busybox.h applets.h Makefile libbb/libbb.h
- - mkdir -p $(LIBBB)
- $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -c $< -o $*.o
-
-$(LIBBB_MOBJ): $(LIBBB_MSRC)
- - mkdir -p $(LIBBB)
- $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o
-
-$(LIBBB_AROBJS): $(LIBBB_ARCSRC)
- - mkdir -p $(LIBBB)
- $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o
-
-libpwd.a: $(PWD_OBJS)
- $(AR) $(ARFLAGS) $@ $^
-
-libbb.a: $(LIBBB_MOBJ) $(LIBBB_AROBJS) $(LIBBB_OBJS)
- $(AR) $(ARFLAGS) $@ $^
-
-usage.o: usage.h
-
-libbb/loop.o: libbb/loop.h
-
-libbb/loop.h: mk_loop_h.sh
- @ $(SHELL) $< > $@
-
-test tests:
- # old way of doing it
- #cd tests && $(MAKE) all
- # new way of doing it
- cd tests && ./tester.sh
-
-clean:
- - cd tests && $(MAKE) clean
- - rm -f docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html \
- docs/busybox.lineo.com/BusyBox.html
- - rm -f docs/busybox.txt docs/busybox.dvi docs/busybox.ps \
- docs/busybox.pdf docs/busybox.lineo.com/busybox.html
- - rm -f multibuild.log Config.h.orig *.gdb *.elf
- - rm -rf docs/busybox _install libpwd.a libbb.a pod2htm*
- - rm -f busybox.links libbb/loop.h *~ slist.mk core applet_source_list
- - find -name \*.o -exec rm -f {} \;
-
-distclean: clean
- - rm -f busybox applet_source_list
- - cd tests && $(MAKE) distclean
-
-install: install.sh busybox busybox.links
- $(SHELL) $< $(PREFIX)
-
-install-hardlinks: install.sh busybox busybox.links
- $(SHELL) $< $(PREFIX) --hardlinks
-
-debug_pristine:
- @ echo VPATH=\"$(VPATH)\"
- @ echo OBJECTS=\"$(OBJECTS)\"
-
-dist release: distclean doc
- cd ..; \
- rm -rf busybox-$(VERSION); \
- cp -a busybox busybox-$(VERSION); \
- \
- find busybox-$(VERSION)/ -type d \
- -name CVS \
- -print \
- -exec rm -rf {} \; ; \
- \
- find busybox-$(VERSION)/ -type f \
- -name .\#* \
- -print \
- -exec rm -f {} \; ; \
- \
- tar -cvzf busybox-$(VERSION).tar.gz busybox-$(VERSION)/;
-
-.PHONY: tags
-tags:
- ctags -R .
+ @exit 1
+
+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)
+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 \
+ include/bbconfigopts.h \
+ include/usage_compressed.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_,scripts)
+
+PHONY += $(mrproper-dirs) mrproper archmrproper
+$(mrproper-dirs):
+ $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
+
+mrproper: clean archmrproper $(mrproper-dirs)
+ $(call cmd,rmdirs)
+ $(call cmd,rmfiles)
+
+# distclean
+#
+PHONY += distclean
+
+distclean: mrproper
+ @find $(srctree) $(RCS_FIND_IGNORE) \
+ \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
+ -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
+ -o -name '.*.rej' -o -size 0 \
+ -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
+ -type f -print | xargs rm -f
+
+
+# Packaging of the kernel to various formats
+# ---------------------------------------------------------------------------
+# rpm target kept for backward compatibility
+package-dir := $(srctree)/scripts/package
+
+%pkg: FORCE
+ $(Q)$(MAKE) $(build)=$(package-dir) $@
+rpm: FORCE
+ $(Q)$(MAKE) $(build)=$(package-dir) $@
+
+
+# Brief documentation of the typical targets used
+# ---------------------------------------------------------------------------
+
+boards := $(wildcard $(srctree)/arch/$(ARCH)/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
+
+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
+# ---------------------------------------------------------------------------
+
+#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 = $(srctree)/
+endif
+
+ifeq ($(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 $(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 / oweals / busybox.git / blobdiff