Rules.mak - codeaurora/busybox - Gitiles

 # Rules.make for busybox
 #
 # Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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   := 1.00-pre9
 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- BB_SRC_DIR=$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      = $(TOPDIR).config

 # 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)))

 # If you have a "pristine" source directory, point BB_SRC_DIR to it.
 # Experimental and incomplete; tell the mailing list
 # <busybox@busybox.net> if you do or don't like it so far.
 BB_SRC_DIR=

 # 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$(GCCINCDIR)
 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")

 WARNINGS=-Wall -Wstrict-prototypes -Wshadow
 CFLAGS=-I$(TOPDIR)include
 ARFLAGS=-r

 #--------------------------------------------------------
 export VERSION BUILDTIME TOPDIR 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

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

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

 #--------------------------------------------------------
 # 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=
 OPTIMIZATION=${call check_gcc,-Os,-O2}

 # Some nice architecture specific optimizations
 ifeq ($(strip $(TARGET_ARCH)),arm)
 	OPTIMIZATION+=-fstrict-aliasing
 endif
 ifeq ($(strip $(TARGET_ARCH)),i386)
 	OPTIMIZATION+=$(call check_gcc,-march=i386,)
 	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
 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) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
     LDFLAGS += -s -Wl,-warn-common
     STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
 endif
 ifeq ($(strip $(CONFIG_STATIC)),y)
     LDFLAGS += --static
 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 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

 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)

 %.o: %.c
 	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<

 .PHONY: dummy


 .EXPORT_ALL_VARIABLES:
	# Rules.make for busybox
	#
	# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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 := 1.00-pre9
	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- BB_SRC_DIR=$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 = $(TOPDIR).config

	# 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)))

	# If you have a "pristine" source directory, point BB_SRC_DIR to it.
	# Experimental and incomplete; tell the mailing list
	# <busybox@busybox.net> if you do or don't like it so far.
	BB_SRC_DIR=

	# 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$(GCCINCDIR)
	#GCCINCDIR:=$(shell gcc -print-search-dirs \| sed -ne "s/install: \(.*\)/\1include/gp")

	WARNINGS=-Wall -Wstrict-prototypes -Wshadow
	CFLAGS=-I$(TOPDIR)include
	ARFLAGS=-r

	#--------------------------------------------------------
	export VERSION BUILDTIME TOPDIR 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

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

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

	#--------------------------------------------------------
	# 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=
	OPTIMIZATION=${call check_gcc,-Os,-O2}

	# Some nice architecture specific optimizations
	ifeq ($(strip $(TARGET_ARCH)),arm)
	OPTIMIZATION+=-fstrict-aliasing
	endif
	ifeq ($(strip $(TARGET_ARCH)),i386)
	OPTIMIZATION+=$(call check_gcc,-march=i386,)
	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
	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) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
	LDFLAGS += -s -Wl,-warn-common
	STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
	endif
	ifeq ($(strip $(CONFIG_STATIC)),y)
	LDFLAGS += --static
	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 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

	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)

	%.o: %.c
	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<

	.PHONY: dummy



	.EXPORT_ALL_VARIABLES: