1 # Rules.make for busybox
3 # Copyright (C) 2002 Erik Andersen <andersee@debian.org>
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.
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.
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
22 BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
24 HOSTCFLAGS:= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
27 # What OS are you compiling busybox for? This allows you to include
28 # OS specific things, syscall overrides, etc.
31 # With a modern GNU make(1) (highly recommended, that's what all the
32 # developers use), all of the following configuration values can be
33 # overridden at the command line. For example:
34 # make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
36 # 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.
41 # If you want a static binary, turn this on.
44 # Set the following to `true' to make a debuggable build.
45 # Leave this set to `false' for production use.
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...
60 # Electric-fence is another very useful malloc debugging library.
61 # Do not enable this for production builds...
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
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.
78 # If you are running a cross compiler, you may want to set CROSS
79 # to something more interesting, like "arm-linux-".
86 STRIP := $(CROSS)strip
88 MAKEFILES := $(TOPDIR).config
89 export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
92 # To compile vs uClibc, just use the compiler wrapper built by uClibc...
93 # Everything should compile and work as expected these days...
94 #CC:=/usr/i386-linux-uclibc/usr/bin/i386-uclibc-gcc
96 # To compile vs some other alternative libc, you may need to use/adjust
97 # the following lines to meet your needs...
99 # If you are using Red Hat 6.x with the compatible RPMs (for developing under
100 # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
101 # using the compatible RPMs (compat-*) at http://www.redhat.com !
102 #LIBCDIR:=/usr/i386-glibc20-linux
104 # The following is used for libc5 (if you install altgcc and libc5-altdev
105 # on a Debian system).
106 #LIBCDIR:=/usr/i486-linuxlibc1
108 # For other libraries, you are on your own...
110 #LIBRARIES:=$(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")
114 WARNINGS:=-Wall -Wstrict-prototypes -Wshadow
115 CFLAGS:=-I$(TOPDIR)include
118 TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
120 -e 's/sparc.*/sparc/' \
122 -e 's/m68k.*/m68k/' \
123 -e 's/ppc/powerpc/g' \
124 -e 's/v850.*/v850/g' \
126 -e 's/mips.*/mips/' \
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...
134 # use '-Os' optimization if available, else use -O2
135 OPTIMIZATION := ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
136 then echo "-Os"; else echo "-O2" ; fi}
138 # Some nice architecture specific optimizations
139 ifeq ($(strip $(TARGET_ARCH)),arm)
140 OPTIMIZATION+=-fstrict-aliasing
142 ifeq ($(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 $(CC) -malign-functions=0 -malign-jumps=0 -S -o /dev/null -xc \
150 /dev/null >/dev/null 2>&1; then echo "-malign-functions=0 -malign-jumps=0"; fi; fi}
152 OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
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.
163 ifeq ($(strip $(DOLFS)),true)
164 # For large file summit support
165 CFLAGS+=-D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64
167 ifeq ($(strip $(DODMALLOC)),true)
168 # For testing mem leaks with dmalloc
171 # Force debug=true, since this is useless when not debugging...
174 ifeq ($(strip $(DOEFENCE)),true)
176 # Force debug=true, since this is useless when not debugging...
180 ifeq ($(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
185 CFLAGS += $(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE
186 LDFLAGS += -s -Wl,-warn-common
187 STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
189 ifeq ($(strip $(DOSTATIC)),true)
194 PREFIX:=`pwd`/_install
197 # Additional complications due to support for pristine source dir.
198 # Include files in the build directory should take precedence over
199 # the copy in BB_SRC_DIR, both during the compilation phase and the
200 # shell script that finds the list of object files.
201 # Work in progress by <ldoolitt@recycle.lbl.gov>.
203 ifneq ($(strip $(BB_SRC_DIR)),)
207 CFLAGS += -DBB_VER='"$(VERSION)"'
208 CFLAGS += -DBB_BT='"$(BUILDTIME)"'
209 OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
210 CFLAGS += $(CROSS_CFLAGS)
212 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
215 # Put user-supplied flags at the end, where they
216 # have a chance of winning.
217 CFLAGS += $(CFLAGS_EXTRA)
220 $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
222 ifdef _FASTDEP_ALL_SUB_DIRS
224 $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
226 $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
229 $(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
230 $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
237 .EXPORT_ALL_VARIABLES: