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# 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
|
