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
20 #--------------------------------------------------------
23 BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
26 #--------------------------------------------------------
27 # With a modern GNU make(1) (highly recommended, that's what all the
28 # developers use), all of the following configuration values can be
29 # overridden at the command line. For example:
30 # make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
31 #--------------------------------------------------------
33 # If you are running a cross compiler, you will want to set 'CROSS'
34 # to something more interesting... Target architecture is determined
35 # by asking the CC compiler what arch it compiles things for, so unless
36 # your compiler is broken, you should not need to specify TARGET_ARCH
37 CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
45 MAKEFILES = $(TOPDIR).config
47 # What OS are you compiling busybox for? This allows you to include
48 # OS specific things, syscall overrides, etc.
51 # Select the compiler needed to build binaries for your development system
53 HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
55 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
58 # If you want to add some simple compiler switches (like -march=i686),
59 # especially from the command line, use this instead of CFLAGS directly.
60 # For optimization overrides, it's better still to set OPTIMIZATION.
61 CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
63 # If you have a "pristine" source directory, point BB_SRC_DIR to it.
64 # Experimental and incomplete; tell the mailing list
65 # <busybox@busybox.net> if you do or don't like it so far.
68 # To compile vs some other alternative libc, you may need to use/adjust
69 # the following lines to meet your needs...
71 # If you are using Red Hat 6.x with the compatible RPMs (for developing under
72 # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
73 # using the compatible RPMs (compat-*) at http://www.redhat.com !
74 #LIBCDIR:=/usr/i386-glibc20-linux
76 # The following is used for libc5 (if you install altgcc and libc5-altdev
77 # on a Debian system).
78 #LIBCDIR:=/usr/i486-linuxlibc1
80 # For other libraries, you are on your own...
82 #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
83 #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
84 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
86 WARNINGS=-Wall -Wstrict-prototypes -Wshadow
87 CFLAGS=-I$(TOPDIR)include
90 #--------------------------------------------------------
91 export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
92 ifeq ($(strip $(TARGET_ARCH)),)
93 TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
95 -e 's/sparc.*/sparc/' \
98 -e 's/ppc/powerpc/g' \
99 -e 's/v850.*/v850/g' \
101 -e 's/mips-.*/mips/' \
102 -e 's/mipsel-.*/mipsel/' \
103 -e 's/cris.*/cris/' \
107 # Pull in the user's uClibc configuration
108 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
109 -include $(TOPDIR).config
112 # A nifty macro to make testing gcc features easier
113 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
114 then echo "$(1)"; else echo "$(2)"; fi)
116 #--------------------------------------------------------
117 # Arch specific compiler optimization stuff should go here.
118 # Unless you want to override the defaults, do not set anything
119 # for OPTIMIZATION...
121 # use '-Os' optimization if available, else use -O2
123 OPTIMIZATION=${call check_gcc,-Os,-O2}
125 # Some nice architecture specific optimizations
126 ifeq ($(strip $(TARGET_ARCH)),arm)
127 OPTIMIZATION+=-fstrict-aliasing
129 ifeq ($(strip $(TARGET_ARCH)),i386)
130 OPTIMIZATION+=-march=i386
131 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
132 OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
133 -malign-functions=0 -malign-jumps=0 -malign-loops=0)
135 OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
138 #--------------------------------------------------------
139 # If you're going to do a lot of builds with a non-vanilla configuration,
140 # it makes sense to adjust parameters above, so you can type "make"
141 # by itself, instead of following it by the same half-dozen overrides
142 # every time. The stuff below, on the other hand, is probably less
143 # prone to casual user adjustment.
146 ifeq ($(strip $(DOLFS)),y)
147 # For large file summit support
148 CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
150 ifeq ($(strip $(DODMALLOC)),y)
151 # For testing mem leaks with dmalloc
155 ifeq ($(strip $(DOEFENCE)),y)
159 ifeq ($(strip $(DODEBUG)),y)
160 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
161 LDFLAGS +=-Wl,-warn-common
162 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
164 CFLAGS += $(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE
165 LDFLAGS += -s -Wl,-warn-common
166 STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
168 ifeq ($(strip $(DOSTATIC)),y)
172 ifeq ($(strip $(PREFIX)),)
173 PREFIX:=`pwd`/_install
176 # Additional complications due to support for pristine source dir.
177 # Include files in the build directory should take precedence over
178 # the copy in BB_SRC_DIR, both during the compilation phase and the
179 # shell script that finds the list of object files.
180 # Work in progress by <ldoolitt@recycle.lbl.gov>.
182 ifneq ($(strip $(BB_SRC_DIR)),)
186 OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
187 CFLAGS += $(CROSS_CFLAGS)
189 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
192 # Put user-supplied flags at the end, where they
193 # have a chance of winning.
194 CFLAGS += $(CFLAGS_EXTRA)
197 $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
199 ifdef _FASTDEP_ALL_SUB_DIRS
201 $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
203 $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
206 $(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
207 $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
214 .EXPORT_ALL_VARIABLES: