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238 lines
8.1 KiB
Makefile
238 lines
8.1 KiB
Makefile
# Rules.make for busybox
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#
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# Copyright (C) 2002 Erik Andersen <andersee@debian.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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PROG := busybox
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VERSION := 0.61.pre
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BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
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HOSTCC := gcc
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HOSTCFLAGS:= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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# What OS are you compiling busybox for? This allows you to include
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# OS specific things, syscall overrides, etc.
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TARGET_OS:=linux
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# With a modern GNU make(1) (highly recommended, that's what all the
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# developers use), all of the following configuration values can be
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# overridden at the command line. For example:
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# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
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# 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:=#-Werror
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# If you want a static binary, turn this on.
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DOSTATIC:=false
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# Set the following to `true' to make a debuggable build.
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# Leave this set to `false' for production use.
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DODEBUG:=false
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# This enables compiling with dmalloc ( http://dmalloc.com/ )
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# which is an excellent public domain mem leak and malloc problem
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# detector. To enable dmalloc, before running busybox you will
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# want to first set up your environment.
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# eg: `export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile`
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# The debug= value is generated using the following command
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# dmalloc -p log-stats -p log-non-free -p log-bad-space -p log-elapsed-time \
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# -p check-fence -p check-heap -p check-lists -p check-blank \
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# -p check-funcs -p realloc-copy -p allow-free-null
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# Do not enable this for production builds...
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DODMALLOC:=false
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# Electric-fence is another very useful malloc debugging library.
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# Do not enable this for production builds...
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DOEFENCE:=false
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# If you want large file summit support, turn this on.
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# This has no effect if you don't have a kernel with lfs
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# support, and a system with libc-2.1.3 or later.
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# Some of the programs that can benefit from lfs support
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# are dd, gzip, mount, tar, and mkfs_minix.
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# LFS allows you to use the above programs for files
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# larger than 2GB!
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DOLFS:=false
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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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# If you are running a cross compiler, you may want to set CROSS
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# to something more interesting, like "arm-linux-".
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CROSS:=
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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 := $(TOPDIR).config
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export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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# To compile vs uClibc, just use the compiler wrapper built by uClibc...
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# Everything should compile and work as expected these days...
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#CC:=/usr/i386-linux-uclibc/bin/i386-uclibc-gcc
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# To compile vs some other alternative libc, you may need to use/adjust
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# the following lines to meet your needs...
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#
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# If you are using Red Hat 6.x with the compatible RPMs (for developing under
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# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
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# using the compatible RPMs (compat-*) at http://www.redhat.com !
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#LIBCDIR:=/usr/i386-glibc20-linux
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#
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# The following is used for libc5 (if you install altgcc and libc5-altdev
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# on a Debian system).
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#LIBCDIR:=/usr/i486-linuxlibc1
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#
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# For other libraries, you are on your own...
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#LDFLAGS+=-nostdlib
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#LIBRARIES:=$(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$(TOPDIR)include
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ARFLAGS:=-r
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TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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-e 's/m68k.*/m68k/' \
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-e 's/ppc/powerpc/g' \
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-e 's/v850.*/v850/g' \
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-e 's/sh[234]/sh/' \
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-e 's/mips.*/mips/' \
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}
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# A nifty macro to make testing gcc features easier
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check_gcc=$(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 $(TARGET_ARCH)),i386)
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OPTIMIZATION+=-march=i386
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OPTIMIZATION+=$(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 $(DOLFS)),true)
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# For large file summit support
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CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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endif
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ifeq ($(strip $(DODMALLOC)),true)
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# For testing mem leaks with dmalloc
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CFLAGS+=-DDMALLOC
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LIBRARIES:=-ldmalloc
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# Force debug=true, since this is useless when not debugging...
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DODEBUG:=true
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else
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ifeq ($(strip $(DOEFENCE)),true)
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LIBRARIES:=-lefence
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# Force debug=true, since this is useless when not debugging...
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DODEBUG:=true
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endif
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endif
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ifeq ($(strip $(DODEBUG)),true)
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CFLAGS +=$(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) $(OPTIMIZATIONS) -D_GNU_SOURCE
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LDFLAGS += -s -Wl,-warn-common
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STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
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endif
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ifeq ($(strip $(DOSTATIC)),true)
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LDFLAGS += --static
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endif
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ifeq ($(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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CFLAGS += -DBB_VER='"$(VERSION)"'
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CFLAGS += -DBB_BT='"$(BUILDTIME)"'
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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 $@ $<
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ifdef _FASTDEP_ALL_SUB_DIRS
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fastdep: dummy
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$(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
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ifdef ALL_SUB_DIRS
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$(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
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endif
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$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
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$(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
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endif
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.PHONY: dummy
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.EXPORT_ALL_VARIABLES:
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