# Rules.make for busybox # # Copyright (C) 1999-2004 by Erik Andersen # # 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 BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") BUSYBOXDIR:= $(shell pwd) #-------------------------------------------------------- # With a modern GNU make(1) (highly recommended, that's what all the # developers use), all of the following configuration values can be # overridden at the command line. For example: # make CROSS=powerpc-linux- BB_SRC_DIR=$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 ifdef NOT_IN_UCLINUX_DIST 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 = $(TOPDIR).config endif # Note that 20K stack space is too low if we use 2GB SD cards FLTFLAGS += -s 30000 # What OS are you compiling busybox for? This allows you to include # OS specific things, syscall overrides, etc. TARGET_OS=linux # Select the compiler needed to build binaries for your development system HOSTCC = gcc HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. LC_ALL:= C # If you want to add some simple compiler switches (like -march=i686), # especially from the command line, use this instead of CFLAGS directly. # For optimization overrides, it's better still to set OPTIMIZATION. CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) # If you have a "pristine" source directory, point BB_SRC_DIR to it. # Experimental and incomplete; tell the mailing list # if you do or don't like it so far. BB_SRC_DIR= # To compile vs some other alternative libc, you may need to use/adjust # the following lines to meet your needs... # # If you are using Red Hat 6.x with the compatible RPMs (for developing under # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about # using the compatible RPMs (compat-*) at http://www.redhat.com ! #LIBCDIR:=/usr/i386-glibc20-linux # # For other libraries, you are on your own. But these may (or may not) help... #LDFLAGS+=-nostdlib #LIBRARIES:=$(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 ifndef UCLINUX_CFLAGS UCLINUX_CFLAGS:=$(CFLAGS) endif CFLAGS:=$(UCLINUX_CFLAGS) CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir) CFLAGS+=-D_BSD_SOURCE -D__USE_BSD ARFLAGS=-r #-------------------------------------------------------- export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP ifeq ($(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 $(top_builddir)/.config endif # A nifty macro to make testing gcc features easier check_gcc=$(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) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG LDFLAGS += -Wl,-warn-common STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment endif ifeq ($(strip $(CONFIG_STATIC)),y) LDFLAGS += --static endif ifeq ($(strip $(PREFIX)),) PREFIX:=`pwd`/_install endif # Additional complications due to support for pristine source dir. # Include files in the build directory should take precedence over # the copy in BB_SRC_DIR, both during the compilation phase and the # shell script that finds the list of object files. # Work in progress by . # ifneq ($(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) .PHONY: dummy .EXPORT_ALL_VARIABLES: