1# Rules.make for busybox 2# 3# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org> 4# 5# Licensed under GPLv2, see the file LICENSE in this tarball for details. 6# 7 8# Pull in the user's busybox configuration 9ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) 10-include $(top_builddir)/.config 11endif 12 13#-------------------------------------------------------- 14PROG := busybox 15MAJOR_VERSION :=1 16MINOR_VERSION :=1 17SUBLEVEL_VERSION:=0 18EXTRAVERSION := 19VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION) 20BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") 21 22 23#-------------------------------------------------------- 24# With a modern GNU make(1) (highly recommended, that's what all the 25# developers use), all of the following configuration values can be 26# overridden at the command line. For example: 27# make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app 28#-------------------------------------------------------- 29 30# If you are running a cross compiler, you will want to set 'CROSS' 31# to something more interesting... Target architecture is determined 32# by asking the CC compiler what arch it compiles things for, so unless 33# your compiler is broken, you should not need to specify TARGET_ARCH 34CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX))) 35CC = $(CROSS)gcc 36AR = $(CROSS)ar 37AS = $(CROSS)as 38LD = $(CROSS)ld 39NM = $(CROSS)nm 40STRIP = $(CROSS)strip 41CPP = $(CC) -E 42# MAKEFILES = $(top_builddir)/.config 43RM = rm 44RM_F = $(RM) -f 45LN = ln 46LN_S = $(LN) -s 47MKDIR = mkdir 48MKDIR_P = $(MKDIR) -p 49MV = mv 50CP = cp 51 52 53# What OS are you compiling busybox for? This allows you to include 54# OS specific things, syscall overrides, etc. 55TARGET_OS=linux 56 57# Select the compiler needed to build binaries for your development system 58HOSTCC = gcc 59HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 60 61# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. 62LC_ALL:= C 63 64# If you want to add some simple compiler switches (like -march=i686), 65# especially from the command line, use this instead of CFLAGS directly. 66# For optimization overrides, it's better still to set OPTIMIZATION. 67CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) 68 69# To compile vs some other alternative libc, you may need to use/adjust 70# the following lines to meet your needs... 71# 72# If you are using Red Hat 6.x with the compatible RPMs (for developing under 73# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about 74# using the compatible RPMs (compat-*) at http://www.redhat.com ! 75#LIBCDIR:=/usr/i386-glibc20-linux 76# 77# For other libraries, you are on your own. But these may (or may not) help... 78#LDFLAGS+=-nostdlib 79#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc 80#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char 81#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp") 82 83WARNINGS=-Wall -Wstrict-prototypes -Wshadow 84CFLAGS=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir) 85ARFLAGS=cru 86 87 88# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest 89# get the CC MAJOR/MINOR version 90CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1)) 91CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1)) 92 93#-------------------------------------------------------- 94export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP 95ifeq ($(strip $(TARGET_ARCH)),) 96TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ 97 -e 's/i.86/i386/' \ 98 -e 's/sparc.*/sparc/' \ 99 -e 's/arm.*/arm/g' \ 100 -e 's/m68k.*/m68k/' \ 101 -e 's/ppc/powerpc/g' \ 102 -e 's/v850.*/v850/g' \ 103 -e 's/sh[234]/sh/' \ 104 -e 's/mips-.*/mips/' \ 105 -e 's/mipsel-.*/mipsel/' \ 106 -e 's/cris.*/cris/' \ 107 ) 108endif 109 110# A nifty macro to make testing gcc features easier 111check_gcc=$(shell \ 112 if [ "$(1)" != "" ]; then \ 113 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \ 114 then echo "$(1)"; else echo "$(2)"; fi \ 115 fi) 116 117# Setup some shortcuts so that silent mode is silent like it should be 118ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS)) 119export MAKE_IS_SILENT=n 120SECHO=@echo 121else 122export MAKE_IS_SILENT=y 123SECHO=-@false 124endif 125 126CFLAGS+=$(call check_gcc,-funsigned-char,) 127 128#-------------------------------------------------------- 129# Arch specific compiler optimization stuff should go here. 130# Unless you want to override the defaults, do not set anything 131# for OPTIMIZATION... 132 133# use '-Os' optimization if available, else use -O2 134OPTIMIZATION:=$(call check_gcc,-Os,-O2) 135 136# Some nice architecture specific optimizations 137ifeq ($(strip $(TARGET_ARCH)),arm) 138 OPTIMIZATION+=-fstrict-aliasing 139endif 140ifeq ($(strip $(TARGET_ARCH)),i386) 141 OPTIMIZATION+=$(call check_gcc,-march=i386,) 142 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,) 143 OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\ 144 -malign-functions=0 -malign-jumps=0 -malign-loops=0) 145endif 146OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer 147 148# 149#-------------------------------------------------------- 150# If you're going to do a lot of builds with a non-vanilla configuration, 151# it makes sense to adjust parameters above, so you can type "make" 152# by itself, instead of following it by the same half-dozen overrides 153# every time. The stuff below, on the other hand, is probably less 154# prone to casual user adjustment. 155# 156 157ifeq ($(strip $(CONFIG_LFS)),y) 158 # For large file summit support 159 CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 160endif 161ifeq ($(strip $(CONFIG_DMALLOC)),y) 162 # For testing mem leaks with dmalloc 163 CFLAGS+=-DDMALLOC 164 LIBRARIES:=-ldmalloc 165else 166 ifeq ($(strip $(CONFIG_EFENCE)),y) 167 LIBRARIES:=-lefence 168 endif 169endif 170ifeq ($(strip $(CONFIG_DEBUG)),y) 171 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE 172 LDFLAGS +=-Wl,-warn-common 173 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging 174else 175 CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG 176 LDFLAGS += -Wl,-warn-common 177 STRIPCMD:=echo 178 #$(STRIP) -s --remove-section=.note --remove-section=.comment 179endif 180ifeq ($(strip $(CONFIG_STATIC)),y) 181 LDFLAGS += --static 182endif 183 184ifeq ($(strip $(CONFIG_SELINUX)),y) 185 LIBRARIES += -lselinux 186endif 187 188ifeq ($(strip $(PREFIX)),) 189 PREFIX:=`pwd`/_install 190endif 191 192# Additional complications due to support for pristine source dir. 193# Include files in the build directory should take precedence over 194# the copy in top_srcdir, both during the compilation phase and the 195# shell script that finds the list of object files. 196# Work in progress by <ldoolitt@recycle.lbl.gov>. 197 198 199OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o 200CFLAGS += $(CROSS_CFLAGS) 201ifdef BB_INIT_SCRIPT 202 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"' 203endif 204 205# Put user-supplied flags at the end, where they 206# have a chance of winning. 207CFLAGS += $(CFLAGS_EXTRA) 208 209#------------------------------------------------------------ 210# Installation options 211ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y) 212INSTALL_OPTS=--hardlinks 213endif 214ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y) 215INSTALL_OPTS=--symlinks 216endif 217ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y) 218INSTALL_OPTS= 219endif 220 221.PHONY: dummy 222