1 # Rules.make for busybox
3 # Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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 := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
26 #--------------------------------------------------------
27 # With a modern GNU make(1) (highly recommended, that's what all the
28 # developers use), all of the following configuration values can be
29 # overridden at the command line. For example:
30 # make CROSS=powerpc-linux- top_srcdir="$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 = $(top_builddir)/.config
47 # What OS are you compiling busybox for? This allows you to include
48 # OS specific things, syscall overrides, etc.
51 # Select the compiler needed to build binaries for your development system
53 HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
55 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
58 # If you want to add some simple compiler switches (like -march=i686),
59 # especially from the command line, use this instead of CFLAGS directly.
60 # For optimization overrides, it's better still to set OPTIMIZATION.
61 CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
63 # To compile vs some other alternative libc, you may need to use/adjust
64 # the following lines to meet your needs...
66 # If you are using Red Hat 6.x with the compatible RPMs (for developing under
67 # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
68 # using the compatible RPMs (compat-*) at http://www.redhat.com !
69 #LIBCDIR:=/usr/i386-glibc20-linux
71 # For other libraries, you are on your own. But these may (or may not) help...
73 #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
74 #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
75 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
77 WARNINGS=-Wall -Wstrict-prototypes -Wshadow
78 CFLAGS=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
81 #--------------------------------------------------------
82 export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
83 ifeq ($(strip $(TARGET_ARCH)),)
84 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
86 -e 's/sparc.*/sparc/' \
89 -e 's/ppc/powerpc/g' \
90 -e 's/v850.*/v850/g' \
92 -e 's/mips-.*/mips/' \
93 -e 's/mipsel-.*/mipsel/' \
98 # Pull in the user's busybox configuration
99 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
100 -include $(top_builddir)/.config
103 # A nifty macro to make testing gcc features easier
105 if [ "$(1)" != "" ]; then \
106 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
107 then echo "$(1)"; else echo "$(2)"; fi \
110 # Setup some shortcuts so that silent mode is silent like it should be
111 ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
112 export MAKE_IS_SILENT=n
115 export MAKE_IS_SILENT=y
119 #--------------------------------------------------------
120 # Arch specific compiler optimization stuff should go here.
121 # Unless you want to override the defaults, do not set anything
122 # for OPTIMIZATION...
124 # use '-Os' optimization if available, else use -O2
125 OPTIMIZATION:=$(call check_gcc,-Os,-O2)
127 # Some nice architecture specific optimizations
128 ifeq ($(strip $(TARGET_ARCH)),arm)
129 OPTIMIZATION+=-fstrict-aliasing
131 ifeq ($(strip $(TARGET_ARCH)),i386)
132 OPTIMIZATION+=$(call check_gcc,-march=i386,)
133 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
134 OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
135 -malign-functions=0 -malign-jumps=0 -malign-loops=0)
137 OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
140 #--------------------------------------------------------
141 # If you're going to do a lot of builds with a non-vanilla configuration,
142 # it makes sense to adjust parameters above, so you can type "make"
143 # by itself, instead of following it by the same half-dozen overrides
144 # every time. The stuff below, on the other hand, is probably less
145 # prone to casual user adjustment.
148 ifeq ($(strip $(CONFIG_LFS)),y)
149 # For large file summit support
150 CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
152 ifeq ($(strip $(CONFIG_DMALLOC)),y)
153 # For testing mem leaks with dmalloc
157 ifeq ($(strip $(CONFIG_EFENCE)),y)
161 ifeq ($(strip $(CONFIG_DEBUG)),y)
162 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
163 LDFLAGS +=-Wl,-warn-common
164 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
166 CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
167 LDFLAGS += -Wl,-warn-common
168 STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
170 ifeq ($(strip $(CONFIG_STATIC)),y)
174 ifeq ($(strip $(CONFIG_SELINUX)),y)
175 LIBRARIES += -lselinux
178 ifeq ($(strip $(PREFIX)),)
179 PREFIX:=`pwd`/_install
182 # Additional complications due to support for pristine source dir.
183 # Include files in the build directory should take precedence over
184 # the copy in top_srcdir, both during the compilation phase and the
185 # shell script that finds the list of object files.
186 # Work in progress by <ldoolitt@recycle.lbl.gov>.
189 OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
190 CFLAGS += $(CROSS_CFLAGS)
192 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
195 # Put user-supplied flags at the end, where they
196 # have a chance of winning.
197 CFLAGS += $(CFLAGS_EXTRA)