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Eric Andersen85208e22002-04-12 12:05:57 +00001# Rules.make for busybox
Eric Andersen4bcdd722001-10-24 05:26:42 +00002#
Eric Andersen85208e22002-04-12 12:05:57 +00003# Copyright (C) 2002 Erik Andersen <andersee@debian.org>
4#
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 2 of the License, or
8# (at your option) any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13# General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program; if not, write to the Free Software
17# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Eric Andersen4bcdd722001-10-24 05:26:42 +000018#
19
Eric Andersen85208e22002-04-12 12:05:57 +000020PROG := busybox
21VERSION := 0.61.pre
22BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
23HOSTCC := gcc
24HOSTCFLAGS:= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
Eric Andersen4bcdd722001-10-24 05:26:42 +000025
26
Eric Andersen85208e22002-04-12 12:05:57 +000027# What OS are you compiling busybox for? This allows you to include
28# OS specific things, syscall overrides, etc.
29TARGET_OS:=linux
Eric Andersen4bcdd722001-10-24 05:26:42 +000030
Eric Andersen85208e22002-04-12 12:05:57 +000031# With a modern GNU make(1) (highly recommended, that's what all the
32# developers use), all of the following configuration values can be
33# overridden at the command line. For example:
34# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
Eric Andersen4bcdd722001-10-24 05:26:42 +000035
Eric Andersen85208e22002-04-12 12:05:57 +000036# If you want to add some simple compiler switches (like -march=i686),
37# especially from the command line, use this instead of CFLAGS directly.
38# For optimization overrides, it's better still to set OPTIMIZATION.
Eric Andersen87715172002-07-31 03:45:05 +000039CFLAGS_EXTRA:=#-Werror
Eric Andersen85208e22002-04-12 12:05:57 +000040
41# If you want a static binary, turn this on.
42DOSTATIC:=false
43
44# Set the following to `true' to make a debuggable build.
45# Leave this set to `false' for production use.
46DODEBUG:=false
47
48# This enables compiling with dmalloc ( http://dmalloc.com/ )
49# which is an excellent public domain mem leak and malloc problem
50# detector. To enable dmalloc, before running busybox you will
51# want to first set up your environment.
52# eg: `export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile`
53# The debug= value is generated using the following command
54# dmalloc -p log-stats -p log-non-free -p log-bad-space -p log-elapsed-time \
55# -p check-fence -p check-heap -p check-lists -p check-blank \
56# -p check-funcs -p realloc-copy -p allow-free-null
57# Do not enable this for production builds...
58DODMALLOC:=false
59
60# Electric-fence is another very useful malloc debugging library.
61# Do not enable this for production builds...
62DOEFENCE:=false
63
64# If you want large file summit support, turn this on.
65# This has no effect if you don't have a kernel with lfs
66# support, and a system with libc-2.1.3 or later.
67# Some of the programs that can benefit from lfs support
68# are dd, gzip, mount, tar, and mkfs_minix.
69# LFS allows you to use the above programs for files
70# larger than 2GB!
71DOLFS:=false
72
73# If you have a "pristine" source directory, point BB_SRC_DIR to it.
74# Experimental and incomplete; tell the mailing list
75# <busybox@busybox.net> if you do or don't like it so far.
76BB_SRC_DIR:=
77
78# If you are running a cross compiler, you may want to set CROSS
79# to something more interesting, like "arm-linux-".
80CROSS:=
81CC := $(CROSS)gcc
82AR := $(CROSS)ar
83AS := $(CROSS)as
84LD := $(CROSS)ld
85NM := $(CROSS)nm
86STRIP := $(CROSS)strip
87CPP := $(CC) -E
88MAKEFILES := $(TOPDIR).config
89export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
90
91
92# To compile vs uClibc, just use the compiler wrapper built by uClibc...
93# Everything should compile and work as expected these days...
Eric Andersen887ca792002-07-03 23:19:26 +000094#CC:=/usr/i386-linux-uclibc/bin/i386-uclibc-gcc
Eric Andersen85208e22002-04-12 12:05:57 +000095
96# To compile vs some other alternative libc, you may need to use/adjust
97# the following lines to meet your needs...
98#
99# If you are using Red Hat 6.x with the compatible RPMs (for developing under
100# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
101# using the compatible RPMs (compat-*) at http://www.redhat.com !
102#LIBCDIR:=/usr/i386-glibc20-linux
103#
104# The following is used for libc5 (if you install altgcc and libc5-altdev
105# on a Debian system).
106#LIBCDIR:=/usr/i486-linuxlibc1
107#
108# For other libraries, you are on your own...
109#LDFLAGS+=-nostdlib
110#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
111#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
112#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
113
Eric Andersen85208e22002-04-12 12:05:57 +0000114WARNINGS:=-Wall -Wstrict-prototypes -Wshadow
115CFLAGS:=-I$(TOPDIR)include
116ARFLAGS:=-r
117
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000118TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
119 -e 's/i.86/i386/' \
120 -e 's/sparc.*/sparc/' \
121 -e 's/arm.*/arm/g' \
122 -e 's/m68k.*/m68k/' \
123 -e 's/ppc/powerpc/g' \
124 -e 's/v850.*/v850/g' \
125 -e 's/sh[234]/sh/' \
126 -e 's/mips.*/mips/' \
127 }
128
129#--------------------------------------------------------
130# Arch specific compiler optimization stuff should go here.
131# Unless you want to override the defaults, do not set anything
132# for OPTIMIZATION...
133
134# use '-Os' optimization if available, else use -O2
Eric Andersen87715172002-07-31 03:45:05 +0000135OPTIMIZATION := ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null \
136 >/dev/null 2>&1; then echo "-Os"; else echo "-O2" ; fi}
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000137
138# Some nice architecture specific optimizations
139ifeq ($(strip $(TARGET_ARCH)),arm)
140 OPTIMIZATION+=-fstrict-aliasing
141endif
142ifeq ($(strip $(TARGET_ARCH)),i386)
143 OPTIMIZATION+=-march=i386
144 OPTIMIZATION+=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc \
145 /dev/null >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; fi}
146 OPTIMIZATION+=${shell if $(CC) -falign-functions=1 -falign-jumps=0 -falign-loops=0 \
147 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo \
148 "-falign-functions=1 -falign-jumps=0 -falign-loops=0"; else \
149 if $(CC) -malign-functions=0 -malign-jumps=0 -S -o /dev/null -xc \
150 /dev/null >/dev/null 2>&1; then echo "-malign-functions=0 -malign-jumps=0"; fi; fi}
151endif
152OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
153
Eric Andersen85208e22002-04-12 12:05:57 +0000154#
155#--------------------------------------------------------
156# If you're going to do a lot of builds with a non-vanilla configuration,
157# it makes sense to adjust parameters above, so you can type "make"
158# by itself, instead of following it by the same half-dozen overrides
159# every time. The stuff below, on the other hand, is probably less
160# prone to casual user adjustment.
161#
162
163ifeq ($(strip $(DOLFS)),true)
164 # For large file summit support
165 CFLAGS+=-D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64
166endif
167ifeq ($(strip $(DODMALLOC)),true)
168 # For testing mem leaks with dmalloc
169 CFLAGS+=-DDMALLOC
170 LIBRARIES:=-ldmalloc
171 # Force debug=true, since this is useless when not debugging...
172 DODEBUG:=true
173else
174 ifeq ($(strip $(DOEFENCE)),true)
175 LIBRARIES:=-lefence
176 # Force debug=true, since this is useless when not debugging...
177 DODEBUG:=true
178 endif
179endif
180ifeq ($(strip $(DODEBUG)),true)
181 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
182 LDFLAGS +=-Wl,-warn-common
183 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
184else
185 CFLAGS += $(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE
186 LDFLAGS += -s -Wl,-warn-common
187 STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
188endif
189ifeq ($(strip $(DOSTATIC)),true)
190 LDFLAGS += --static
191endif
192
193ifndef $(PREFIX)
194 PREFIX:=`pwd`/_install
195endif
196
197# Additional complications due to support for pristine source dir.
198# Include files in the build directory should take precedence over
199# the copy in BB_SRC_DIR, both during the compilation phase and the
200# shell script that finds the list of object files.
201# Work in progress by <ldoolitt@recycle.lbl.gov>.
202#
203ifneq ($(strip $(BB_SRC_DIR)),)
204 VPATH:=$(BB_SRC_DIR)
205endif
206
207CFLAGS += -DBB_VER='"$(VERSION)"'
208CFLAGS += -DBB_BT='"$(BUILDTIME)"'
209OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
210CFLAGS += $(CROSS_CFLAGS)
211ifdef BB_INIT_SCRIPT
212 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
213endif
214
215# Put user-supplied flags at the end, where they
216# have a chance of winning.
217CFLAGS += $(CFLAGS_EXTRA)
Eric Andersen4bcdd722001-10-24 05:26:42 +0000218
219%.o: %.c
Eric Andersen85208e22002-04-12 12:05:57 +0000220 $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
Eric Andersen4bcdd722001-10-24 05:26:42 +0000221
Eric Andersen85208e22002-04-12 12:05:57 +0000222ifdef _FASTDEP_ALL_SUB_DIRS
Eric Andersen4bcdd722001-10-24 05:26:42 +0000223fastdep: dummy
Eric Andersen85208e22002-04-12 12:05:57 +0000224 $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
Eric Andersen4bcdd722001-10-24 05:26:42 +0000225ifdef ALL_SUB_DIRS
226 $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
227endif
228
Eric Andersen4bcdd722001-10-24 05:26:42 +0000229$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
230 $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
231endif
232
Eric Andersen85208e22002-04-12 12:05:57 +0000233.PHONY: dummy
Eric Andersen4bcdd722001-10-24 05:26:42 +0000234
Eric Andersen4bcdd722001-10-24 05:26:42 +0000235
Eric Andersen4bcdd722001-10-24 05:26:42 +0000236
Eric Andersen85208e22002-04-12 12:05:57 +0000237.EXPORT_ALL_VARIABLES:
Eric Andersen4bcdd722001-10-24 05:26:42 +0000238