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201 lines
6.8 KiB
Makefile
201 lines
6.8 KiB
Makefile
# Rules.make for busybox
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#
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# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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#--------------------------------------------------------
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PROG := busybox
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VERSION := 1.00-rc1
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BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
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#--------------------------------------------------------
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# With a modern GNU make(1) (highly recommended, that's what all the
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# developers use), all of the following configuration values can be
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# overridden at the command line. For example:
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# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
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#--------------------------------------------------------
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# If you are running a cross compiler, you will want to set 'CROSS'
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# to something more interesting... Target architecture is determined
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# by asking the CC compiler what arch it compiles things for, so unless
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# your compiler is broken, you should not need to specify TARGET_ARCH
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CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
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CC = $(CROSS)gcc
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AR = $(CROSS)ar
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AS = $(CROSS)as
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LD = $(CROSS)ld
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NM = $(CROSS)nm
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STRIP = $(CROSS)strip
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CPP = $(CC) -E
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MAKEFILES = $(TOPDIR).config
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# What OS are you compiling busybox for? This allows you to include
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# OS specific things, syscall overrides, etc.
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TARGET_OS=linux
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# Select the compiler needed to build binaries for your development system
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HOSTCC = gcc
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HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
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LC_ALL:= C
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# If you want to add some simple compiler switches (like -march=i686),
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# especially from the command line, use this instead of CFLAGS directly.
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# For optimization overrides, it's better still to set OPTIMIZATION.
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CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
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# If you have a "pristine" source directory, point BB_SRC_DIR to it.
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# Experimental and incomplete; tell the mailing list
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# <busybox@busybox.net> if you do or don't like it so far.
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BB_SRC_DIR=
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# To compile vs some other alternative libc, you may need to use/adjust
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# the following lines to meet your needs...
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#
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# If you are using Red Hat 6.x with the compatible RPMs (for developing under
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# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
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# using the compatible RPMs (compat-*) at http://www.redhat.com !
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#LIBCDIR:=/usr/i386-glibc20-linux
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#
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# For other libraries, you are on your own. But these may (or may not) help...
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#LDFLAGS+=-nostdlib
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#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
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#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
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#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
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WARNINGS=-Wall -Wstrict-prototypes -Wshadow
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CFLAGS=-I$(TOPDIR)include
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ARFLAGS=-r
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#--------------------------------------------------------
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export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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ifeq ($(strip $(TARGET_ARCH)),)
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TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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-e 's/m68k.*/m68k/' \
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-e 's/ppc/powerpc/g' \
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-e 's/v850.*/v850/g' \
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-e 's/sh[234]/sh/' \
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-e 's/mips-.*/mips/' \
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-e 's/mipsel-.*/mipsel/' \
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-e 's/cris.*/cris/' \
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)
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endif
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# Pull in the user's busybox configuration
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ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
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-include $(TOPDIR).config
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endif
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# A nifty macro to make testing gcc features easier
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check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
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then echo "$(1)"; else echo "$(2)"; fi)
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#--------------------------------------------------------
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# Arch specific compiler optimization stuff should go here.
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# Unless you want to override the defaults, do not set anything
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# for OPTIMIZATION...
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# use '-Os' optimization if available, else use -O2
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OPTIMIZATION=
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OPTIMIZATION=${call check_gcc,-Os,-O2}
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# Some nice architecture specific optimizations
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ifeq ($(strip $(TARGET_ARCH)),arm)
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OPTIMIZATION+=-fstrict-aliasing
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endif
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ifeq ($(strip $(TARGET_ARCH)),i386)
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OPTIMIZATION+=$(call check_gcc,-march=i386,)
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OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
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OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
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-malign-functions=0 -malign-jumps=0 -malign-loops=0)
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endif
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OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
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#
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#--------------------------------------------------------
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# If you're going to do a lot of builds with a non-vanilla configuration,
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# it makes sense to adjust parameters above, so you can type "make"
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# by itself, instead of following it by the same half-dozen overrides
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# every time. The stuff below, on the other hand, is probably less
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# prone to casual user adjustment.
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#
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ifeq ($(strip $(CONFIG_LFS)),y)
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# For large file summit support
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CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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endif
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ifeq ($(strip $(CONFIG_DMALLOC)),y)
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# For testing mem leaks with dmalloc
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CFLAGS+=-DDMALLOC
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LIBRARIES:=-ldmalloc
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else
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ifeq ($(strip $(CONFIG_EFENCE)),y)
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LIBRARIES:=-lefence
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endif
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endif
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ifeq ($(strip $(CONFIG_DEBUG)),y)
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CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
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LDFLAGS +=-Wl,-warn-common
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STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
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else
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CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
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LDFLAGS += -s -Wl,-warn-common
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STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
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endif
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ifeq ($(strip $(CONFIG_STATIC)),y)
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LDFLAGS += --static
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endif
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ifeq ($(strip $(PREFIX)),)
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PREFIX:=`pwd`/_install
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endif
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# Additional complications due to support for pristine source dir.
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# Include files in the build directory should take precedence over
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# the copy in BB_SRC_DIR, both during the compilation phase and the
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# shell script that finds the list of object files.
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# Work in progress by <ldoolitt@recycle.lbl.gov>.
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#
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ifneq ($(strip $(BB_SRC_DIR)),)
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VPATH:=$(BB_SRC_DIR)
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endif
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OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
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CFLAGS += $(CROSS_CFLAGS)
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ifdef BB_INIT_SCRIPT
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CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
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endif
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# Put user-supplied flags at the end, where they
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# have a chance of winning.
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CFLAGS += $(CFLAGS_EXTRA)
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%.o: %.c
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$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
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.PHONY: dummy
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.EXPORT_ALL_VARIABLES:
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