Makefile - fp2-dev/platform/external/busybox - Gitiles

 # Makefile for busybox
 #
 # 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
 #

 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")

 # 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)

 WARNINGS = -Wall -Wshadow

 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.
 #

 ifeq ($(strip $(DOLFS)),true)
     # For large file summit support
     CFLAGS+=-D_FILE_OFFSET_BITS=64
 endif
 ifeq ($(strip $(DODMALLOC)),true)
     # For testing mem leaks with dmalloc
     CFLAGS+=-DDMALLOC
     LIBRARIES = -ldmalloc
     # Force debug=true, since this is useless when not debugging...
     DODEBUG = true
 else
     ifeq ($(strip $(DOEFENCE)),true)
 	LIBRARIES = -lefence
 	# Force debug=true, since this is useless when not debugging...
 	DODEBUG = true
     endif
 endif
 ifeq ($(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 $(PROG)
 endif
 ifeq ($(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
 endif

 ifndef $(PREFIX)
     PREFIX = `pwd`/_install
 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>.
 #
 ifneq ($(strip $(BB_SRC_DIR)),)
     VPATH = $(BB_SRC_DIR)
 endif
 #ifneq ($(strip $(VPATH)),)
 #    CFLAGS += -I- -I. $(patsubst %,-I%,$(subst :, ,$(VPATH)))
 #endif

 # We need to set APPLET_SOURCES to something like
 #   $(shell busybox.sh Config.h)
 # but in a manner that works with VPATH and BB_SRC_DIR.
 # Possible ways to approach this:
 #
 #   1. Explicitly search through .:$(VPATH) for busybox.sh and config.h,
 #      then $(shell $(BUSYBOX_SH) $(CONFIG_H) $(BB_SRC_DIR))
 #
 #   2. Explicity search through .:$(VPATH) for slist.mk,
 #      then $(shell $(MAKE) -f $(SLIST_MK) VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR))
 #
 #   3. Create slist.mk in this directory, with commands embedded in
 #      a $(shell ...) command, and $(MAKE) it immediately.
 #
 #   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.
 #
 # This is option 3:
 #
 #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)"'
 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)
 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
 LIBBB_OBJS=$(patsubst %.c,$(LIBBB)/%.o, $(LIBBB_CSRC))
 LIBBB_CFLAGS = -I$(LIBBB)
 ifneq ($(strip $(BB_SRC_DIR)),)
     LIBBB_CFLAGS += -I$(BB_SRC_DIR)/$(LIBBB)
 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
 LIBBB_MOBJ=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_MESSAGES))

 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))


 # Put user-supplied flags at the end, where they
 # have a chance of winning.
 CFLAGS += $(CFLAGS_EXTRA)

 .EXPORT_ALL_VARIABLES:

 all: applet_source_list busybox busybox.links doc

 applet_source_list: busybox.sh Config.h
 	(echo -n "APPLET_SOURCES := "; BB_SRC_DIR=$(BB_SRC_DIR) $(SHELL) $^) > $@

 doc: olddoc

 # Old Docs...
 olddoc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html

 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

 docs/BusyBox.txt: docs/busybox.pod
 	@echo
 	@echo BusyBox Documentation
 	@echo
 	-mkdir -p docs
 	-pod2text $< > $@

 docs/BusyBox.1: docs/busybox.pod
 	- mkdir -p docs
 	- pod2man --center=BusyBox --release="version $(VERSION)" \
 		$< > $@

 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

 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*


 # New docs based on DOCBOOK SGML
 newdoc: docs/busybox.txt docs/busybox.pdf docs/busybox/busyboxdocumentation.html

 docs/busybox.txt: docs/busybox.sgml
 	@echo
 	@echo BusyBox Documentation
 	@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
 sh.o: cmdedit.h
 $(OBJECTS): %.o: %.c Config.h busybox.h applets.h Makefile
 	$(CC) -I- $(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

 sh.o: sh.c lash.c hush.c msh.c ash.c

 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
 	- 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 .
	# Makefile for busybox
	#
	# 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
	#

	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")

	# 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)

	WARNINGS = -Wall -Wshadow

	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.
	#

	ifeq ($(strip $(DOLFS)),true)
	# For large file summit support
	CFLAGS+=-D_FILE_OFFSET_BITS=64
	endif
	ifeq ($(strip $(DODMALLOC)),true)
	# For testing mem leaks with dmalloc
	CFLAGS+=-DDMALLOC
	LIBRARIES = -ldmalloc
	# Force debug=true, since this is useless when not debugging...
	DODEBUG = true
	else
	ifeq ($(strip $(DOEFENCE)),true)
	LIBRARIES = -lefence
	# Force debug=true, since this is useless when not debugging...
	DODEBUG = true
	endif
	endif
	ifeq ($(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 $(PROG)
	endif
	ifeq ($(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
	endif

	ifndef $(PREFIX)
	PREFIX = `pwd`/_install
	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>.
	#
	ifneq ($(strip $(BB_SRC_DIR)),)
	VPATH = $(BB_SRC_DIR)
	endif
	#ifneq ($(strip $(VPATH)),)
	# CFLAGS += -I- -I. $(patsubst %,-I%,$(subst :, ,$(VPATH)))
	#endif

	# We need to set APPLET_SOURCES to something like
	# $(shell busybox.sh Config.h)
	# but in a manner that works with VPATH and BB_SRC_DIR.
	# Possible ways to approach this:
	#
	# 1. Explicitly search through .:$(VPATH) for busybox.sh and config.h,
	# then $(shell $(BUSYBOX_SH) $(CONFIG_H) $(BB_SRC_DIR))
	#
	# 2. Explicity search through .:$(VPATH) for slist.mk,
	# then $(shell $(MAKE) -f $(SLIST_MK) VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR))
	#
	# 3. Create slist.mk in this directory, with commands embedded in
	# a $(shell ...) command, and $(MAKE) it immediately.
	#
	# 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.
	#
	# This is option 3:
	#
	#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)"'
	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)
	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
	LIBBB_OBJS=$(patsubst %.c,$(LIBBB)/%.o, $(LIBBB_CSRC))
	LIBBB_CFLAGS = -I$(LIBBB)
	ifneq ($(strip $(BB_SRC_DIR)),)
	LIBBB_CFLAGS += -I$(BB_SRC_DIR)/$(LIBBB)
	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
	LIBBB_MOBJ=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_MESSAGES))

	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))


	# Put user-supplied flags at the end, where they
	# have a chance of winning.
	CFLAGS += $(CFLAGS_EXTRA)

	.EXPORT_ALL_VARIABLES:

	all: applet_source_list busybox busybox.links doc

	applet_source_list: busybox.sh Config.h
	(echo -n "APPLET_SOURCES := "; BB_SRC_DIR=$(BB_SRC_DIR) $(SHELL) $^) > $@

	doc: olddoc

	# Old Docs...
	olddoc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html

	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

	docs/BusyBox.txt: docs/busybox.pod
	@echo
	@echo BusyBox Documentation
	@echo
	-mkdir -p docs
	-pod2text $< > $@

	docs/BusyBox.1: docs/busybox.pod
	- mkdir -p docs
	- pod2man --center=BusyBox --release="version $(VERSION)" \
	$< > $@

	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

	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*


	# New docs based on DOCBOOK SGML
	newdoc: docs/busybox.txt docs/busybox.pdf docs/busybox/busyboxdocumentation.html

	docs/busybox.txt: docs/busybox.sgml
	@echo
	@echo BusyBox Documentation
	@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
	sh.o: cmdedit.h
	$(OBJECTS): %.o: %.c Config.h busybox.h applets.h Makefile
	$(CC) -I- $(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

	sh.o: sh.c lash.c hush.c msh.c ash.c

	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
	- 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 .