Rules.mak - codeaurora/busybox - Gitiles

 # Rules.make for busybox
 #
 # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
 #
 # Licensed under GPLv2, see the file LICENSE in this tarball for details.
 #

 # Pull in the user's busybox configuration
 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 -include $(top_builddir)/.config
 endif

 #--------------------------------------------------------
 PROG      := busybox
 MAJOR_VERSION   :=1
 MINOR_VERSION   :=1
 SUBLEVEL_VERSION:=1
 EXTRAVERSION    :=-pre0
 VERSION   :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
 BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")


 #--------------------------------------------------------
 # 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- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
 #--------------------------------------------------------

 # If you are running a cross compiler, you will want to set 'CROSS'
 # to something more interesting...  Target architecture is determined
 # by asking the CC compiler what arch it compiles things for, so unless
 # your compiler is broken, you should not need to specify TARGET_ARCH
 CROSS           =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
 CC             = $(CROSS)gcc
 AR             = $(CROSS)ar
 AS             = $(CROSS)as
 LD             = $(CROSS)ld
 NM             = $(CROSS)nm
 STRIP          = $(CROSS)strip
 CPP            = $(CC) -E
 # MAKEFILES      = $(top_builddir)/.config
 RM             = rm
 RM_F           = $(RM) -f
 LN             = ln
 LN_S           = $(LN) -s
 MKDIR          = mkdir
 MKDIR_P        = $(MKDIR) -p
 MV             = mv
 CP             = cp


 # What OS are you compiling busybox for?  This allows you to include
 # OS specific things, syscall overrides, etc.
 TARGET_OS=linux

 # Select the compiler needed to build binaries for your development system
 HOSTCC    = gcc
 HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer

 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 LC_ALL:= C

 # 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=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))

 # 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
 #
 # For other libraries, you are on your own.  But these may (or may not) help...
 #LDFLAGS+=-nostdlib
 #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
 #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char
 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")

 WARNINGS=-Wall -Wstrict-prototypes -Wshadow
 CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)

 ARFLAGS=cru


 # gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
 # get the CC MAJOR/MINOR version
 CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
 CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1))

 #--------------------------------------------------------
 export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
 ifeq ($(strip $(TARGET_ARCH)),)
 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
 		-e 's/i.86/i386/' \
 		-e 's/sparc.*/sparc/' \
 		-e 's/arm.*/arm/g' \
 		-e 's/m68k.*/m68k/' \
 		-e 's/ppc/powerpc/g' \
 		-e 's/v850.*/v850/g' \
 		-e 's/sh[234]/sh/' \
 		-e 's/mips-.*/mips/' \
 		-e 's/mipsel-.*/mipsel/' \
 		-e 's/cris.*/cris/' \
 		)
 endif

 # A nifty macro to make testing gcc features easier
 check_gcc=$(shell \
 	if [ "$(1)" != "" ]; then \
 		if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 		then echo "$(1)"; else echo "$(2)"; fi \
 	fi)

 # Setup some shortcuts so that silent mode is silent like it should be
 ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
 export MAKE_IS_SILENT=n
 SECHO=@echo
 else
 export MAKE_IS_SILENT=y
 SECHO=-@false
 endif

 CFLAGS+=$(call check_gcc,-funsigned-char,)

 CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)

 #--------------------------------------------------------
 # Arch specific compiler optimization stuff should go here.
 # Unless you want to override the defaults, do not set anything
 # for OPTIMIZATION...

 # use '-Os' optimization if available, else use -O2
 OPTIMIZATION:=$(call check_gcc,-Os,-O2)

 ifeq ($(CONFIG_BUILD_AT_ONCE),y)
 # gcc 2.95 exits with 0 for "unrecognized option"
 ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
 	OPTIMIZATION+=$(call check_gcc,-combine,)
 endif
 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
 endif # CONFIG_BUILD_AT_ONCE

 # Some nice architecture specific optimizations
 ifeq ($(strip $(TARGET_ARCH)),arm)
 	OPTIMIZATION+=-fstrict-aliasing
 	OPTIMIZATION+=$(call check_gcc,-msingle-pic-base,)
 endif
 ifeq ($(strip $(TARGET_ARCH)),i386)
 	OPTIMIZATION+=$(call check_gcc,-march=i386,)
 # gcc-4.0 and older seem to suffer from these
 ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
 	OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 	OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
 		-malign-functions=0 -malign-jumps=0 -malign-loops=0)
 endif # gcc-4.0 and older

 # gcc-4.1 and beyond seem to benefit from these
 ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
 	# turn off flags which hurt -Os
 	OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 	OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 	OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)

 	OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,)
 endif # gcc-4.1 and beyond
 endif
 OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer

 #
 #--------------------------------------------------------
 # 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 $(CONFIG_LFS)),y)
     # For large file summit support
     CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
 endif
 ifeq ($(strip $(CONFIG_DMALLOC)),y)
     # For testing mem leaks with dmalloc
     CFLAGS+=-DDMALLOC
     LIBRARIES:=-ldmalloc
 else
     ifeq ($(strip $(CONFIG_EFENCE)),y)
 	LIBRARIES:=-lefence
     endif
 endif
 ifeq ($(strip $(CONFIG_DEBUG)),y)
     CFLAGS  +=$(WARNINGS) -g -D_GNU_SOURCE
     LDFLAGS +=-Wl,-warn-common
     STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
 else
     CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
     LDFLAGS += -Wl,-warn-common -Wl,--sort-common
     STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
 endif
 ifeq ($(strip $(CONFIG_STATIC)),y)
     LDFLAGS += --static
 #else
 #    LIBRARIES += -ldl
 endif

 ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
     CFLAGS_PIC:= -fPIC #-DPIC
 endif

 ifeq ($(strip $(CONFIG_SELINUX)),y)
     LIBRARIES += -lselinux
 endif

 ifeq ($(strip $(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 top_srcdir, both during the compilation phase and the
 # shell script that finds the list of object files.
 # Work in progress by <ldoolitt@recycle.lbl.gov>.


 OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
 CFLAGS    += $(CROSS_CFLAGS)
 ifdef BB_INIT_SCRIPT
     CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
 endif

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

 #------------------------------------------------------------
 # Installation options
 ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
 INSTALL_OPTS=--hardlinks
 endif
 ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
 INSTALL_OPTS=--symlinks
 endif
 ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
 INSTALL_OPTS=
 endif

 .PHONY: dummy
	# Rules.make for busybox
	#
	# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
	#
	# Licensed under GPLv2, see the file LICENSE in this tarball for details.
	#

	# Pull in the user's busybox configuration
	ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
	-include $(top_builddir)/.config
	endif

	#--------------------------------------------------------
	PROG := busybox
	MAJOR_VERSION :=1
	MINOR_VERSION :=1
	SUBLEVEL_VERSION:=1
	EXTRAVERSION :=-pre0
	VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
	BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")


	#--------------------------------------------------------
	# 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- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
	#--------------------------------------------------------

	# If you are running a cross compiler, you will want to set 'CROSS'
	# to something more interesting... Target architecture is determined
	# by asking the CC compiler what arch it compiles things for, so unless
	# your compiler is broken, you should not need to specify TARGET_ARCH
	CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
	CC = $(CROSS)gcc
	AR = $(CROSS)ar
	AS = $(CROSS)as
	LD = $(CROSS)ld
	NM = $(CROSS)nm
	STRIP = $(CROSS)strip
	CPP = $(CC) -E
	# MAKEFILES = $(top_builddir)/.config
	RM = rm
	RM_F = $(RM) -f
	LN = ln
	LN_S = $(LN) -s
	MKDIR = mkdir
	MKDIR_P = $(MKDIR) -p
	MV = mv
	CP = cp


	# What OS are you compiling busybox for? This allows you to include
	# OS specific things, syscall overrides, etc.
	TARGET_OS=linux

	# Select the compiler needed to build binaries for your development system
	HOSTCC = gcc
	HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer

	# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
	LC_ALL:= C

	# 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=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))

	# 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
	#
	# For other libraries, you are on your own. But these may (or may not) help...
	#LDFLAGS+=-nostdlib
	#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
	#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char
	#GCCINCDIR:=$(shell gcc -print-search-dirs \| sed -ne "s/install: \(.*\)/\1include/gp")

	WARNINGS=-Wall -Wstrict-prototypes -Wshadow
	CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)

	ARFLAGS=cru


	# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
	# get the CC MAJOR/MINOR version
	CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ \| $(CC) -E -xc - \| tail -n 1))
	CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ \| $(CC) -E -xc - \| tail -n 1))

	#--------------------------------------------------------
	export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
	ifeq ($(strip $(TARGET_ARCH)),)
	TARGET_ARCH:=$(shell $(CC) -dumpmachine \| sed -e s'/-.*//' \
	-e 's/i.86/i386/' \
	-e 's/sparc.*/sparc/' \
	-e 's/arm.*/arm/g' \
	-e 's/m68k.*/m68k/' \
	-e 's/ppc/powerpc/g' \
	-e 's/v850.*/v850/g' \
	-e 's/sh[234]/sh/' \
	-e 's/mips-.*/mips/' \
	-e 's/mipsel-.*/mipsel/' \
	-e 's/cris.*/cris/' \
	)
	endif

	# A nifty macro to make testing gcc features easier
	check_gcc=$(shell \
	if [ "$(1)" != "" ]; then \
	if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
	then echo "$(1)"; else echo "$(2)"; fi \
	fi)

	# Setup some shortcuts so that silent mode is silent like it should be
	ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
	export MAKE_IS_SILENT=n
	SECHO=@echo
	else
	export MAKE_IS_SILENT=y
	SECHO=-@false
	endif

	CFLAGS+=$(call check_gcc,-funsigned-char,)

	CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)

	#--------------------------------------------------------
	# Arch specific compiler optimization stuff should go here.
	# Unless you want to override the defaults, do not set anything
	# for OPTIMIZATION...

	# use '-Os' optimization if available, else use -O2
	OPTIMIZATION:=$(call check_gcc,-Os,-O2)

	ifeq ($(CONFIG_BUILD_AT_ONCE),y)
	# gcc 2.95 exits with 0 for "unrecognized option"
	ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
	OPTIMIZATION+=$(call check_gcc,-combine,)
	endif
	OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
	PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
	endif # CONFIG_BUILD_AT_ONCE

	# Some nice architecture specific optimizations
	ifeq ($(strip $(TARGET_ARCH)),arm)
	OPTIMIZATION+=-fstrict-aliasing
	OPTIMIZATION+=$(call check_gcc,-msingle-pic-base,)
	endif
	ifeq ($(strip $(TARGET_ARCH)),i386)
	OPTIMIZATION+=$(call check_gcc,-march=i386,)
	# gcc-4.0 and older seem to suffer from these
	ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
	OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
	OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
	-malign-functions=0 -malign-jumps=0 -malign-loops=0)
	endif # gcc-4.0 and older

	# gcc-4.1 and beyond seem to benefit from these
	ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
	# turn off flags which hurt -Os
	OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
	OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
	OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)

	OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,)
	endif # gcc-4.1 and beyond
	endif
	OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer

	#
	#--------------------------------------------------------
	# 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 $(CONFIG_LFS)),y)
	# For large file summit support
	CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
	endif
	ifeq ($(strip $(CONFIG_DMALLOC)),y)
	# For testing mem leaks with dmalloc
	CFLAGS+=-DDMALLOC
	LIBRARIES:=-ldmalloc
	else
	ifeq ($(strip $(CONFIG_EFENCE)),y)
	LIBRARIES:=-lefence
	endif
	endif
	ifeq ($(strip $(CONFIG_DEBUG)),y)
	CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
	LDFLAGS +=-Wl,-warn-common
	STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
	else
	CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
	LDFLAGS += -Wl,-warn-common -Wl,--sort-common
	STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
	endif
	ifeq ($(strip $(CONFIG_STATIC)),y)
	LDFLAGS += --static
	#else
	# LIBRARIES += -ldl
	endif

	ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
	CFLAGS_PIC:= -fPIC #-DPIC
	endif

	ifeq ($(strip $(CONFIG_SELINUX)),y)
	LIBRARIES += -lselinux
	endif

	ifeq ($(strip $(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 top_srcdir, both during the compilation phase and the
	# shell script that finds the list of object files.
	# Work in progress by <ldoolitt@recycle.lbl.gov>.


	OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
	CFLAGS += $(CROSS_CFLAGS)
	ifdef BB_INIT_SCRIPT
	CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
	endif

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

	#------------------------------------------------------------
	# Installation options
	ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
	INSTALL_OPTS=--hardlinks
	endif
	ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
	INSTALL_OPTS=--symlinks
	endif
	ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
	INSTALL_OPTS=
	endif

	.PHONY: dummy