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)))
43 STRIP := $(CROSS)strip
45 MAKEFILES := $(TOPDIR).config
47 # What OS are you compiling busybox for? This allows you to include
48 # OS specific things, syscall overrides, etc.
51 # Select the compiler needed to build binaries for your development system
53 HOSTCFLAGS:= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
55 # If you want to add some simple compiler switches (like -march=i686),
56 # especially from the command line, use this instead of CFLAGS directly.
57 # For optimization overrides, it's better still to set OPTIMIZATION.
58 CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
60 # If you have a "pristine" source directory, point BB_SRC_DIR to it.
61 # Experimental and incomplete; tell the mailing list
62 # <busybox@busybox.net> if you do or don't like it so far.
65 # To compile vs some other alternative libc, you may need to use/adjust
66 # the following lines to meet your needs...
68 # If you are using Red Hat 6.x with the compatible RPMs (for developing under
69 # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
70 # using the compatible RPMs (compat-*) at http://www.redhat.com !
71 #LIBCDIR:=/usr/i386-glibc20-linux
73 # The following is used for libc5 (if you install altgcc and libc5-altdev
74 # on a Debian system).
75 #LIBCDIR:=/usr/i486-linuxlibc1
77 # For other libraries, you are on your own...
79 #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
80 #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
81 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
83 WARNINGS:=-Wall -Wstrict-prototypes -Wshadow
84 CFLAGS:=-I$(TOPDIR)include
87 #--------------------------------------------------------
88 export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
89 ifeq ($(strip $(TARGET_ARCH)),)
90 TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
92 -e 's/sparc.*/sparc/' \
95 -e 's/ppc/powerpc/g' \
96 -e 's/v850.*/v850/g' \
98 -e 's/mips-.*/mips/' \
99 -e 's/mipsel-.*/mipsel/' \
100 -e 's/cris.*/cris/' \
104 # Pull in the user's uClibc configuration
105 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
107 -include $(TOPDIR).config
110 # A nifty macro to make testing gcc features easier
111 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
112 then echo "$(1)"; else echo "$(2)"; fi)
114 #--------------------------------------------------------
115 # Arch specific compiler optimization stuff should go here.
116 # Unless you want to override the defaults, do not set anything
117 # for OPTIMIZATION...
119 # use '-Os' optimization if available, else use -O2
121 OPTIMIZATION+=${call check_gcc,-Os,-O2}
123 # Some nice architecture specific optimizations
124 ifeq ($(strip $(TARGET_ARCH)),arm)
125 OPTIMIZATION+=-fstrict-aliasing
127 ifeq ($(strip $(TARGET_ARCH)),i386)
128 OPTIMIZATION+=-march=i386
129 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
130 OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
131 -malign-functions=0 -malign-jumps=0 -malign-loops=0)
133 OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
136 #--------------------------------------------------------
137 # If you're going to do a lot of builds with a non-vanilla configuration,
138 # it makes sense to adjust parameters above, so you can type "make"
139 # by itself, instead of following it by the same half-dozen overrides
140 # every time. The stuff below, on the other hand, is probably less
141 # prone to casual user adjustment.
144 ifeq ($(strip $(DOLFS)),y)
145 # For large file summit support
146 CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
148 ifeq ($(strip $(DODMALLOC)),y)
149 # For testing mem leaks with dmalloc
153 ifeq ($(strip $(DOEFENCE)),y)
157 ifeq ($(strip $(DODEBUG)),y)
158 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
159 LDFLAGS +=-Wl,-warn-common
160 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
162 CFLAGS += $(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE
163 LDFLAGS += -s -Wl,-warn-common
164 STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
166 ifeq ($(strip $(DOSTATIC)),y)
170 ifeq ($(strip $(PREFIX)),)
171 PREFIX:=`pwd`/_install
174 # Additional complications due to support for pristine source dir.
175 # Include files in the build directory should take precedence over
176 # the copy in BB_SRC_DIR, both during the compilation phase and the
177 # shell script that finds the list of object files.
178 # Work in progress by <ldoolitt@recycle.lbl.gov>.
180 ifneq ($(strip $(BB_SRC_DIR)),)
184 OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
185 CFLAGS += $(CROSS_CFLAGS)
187 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
190 # Put user-supplied flags at the end, where they
191 # have a chance of winning.
192 CFLAGS += $(CFLAGS_EXTRA)
195 $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
197 ifdef _FASTDEP_ALL_SUB_DIRS
199 $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
201 $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
204 $(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
205 $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
212 .EXPORT_ALL_VARIABLES: