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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 Andersend4fcb802003-07-15 00:28:26 +00003# Copyright (C) 2001-2003 Erik Andersen <andersen@codepoet.org>
Eric Andersen85208e22002-04-12 12:05:57 +00004#
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 Andersenc9f20d92002-12-05 08:41:41 +000020#--------------------------------------------------------
Eric Andersen85208e22002-04-12 12:05:57 +000021PROG := busybox
Eric Andersen747f2f72003-12-09 17:31:48 +000022VERSION := 1.00-pre4
Eric Andersen85208e22002-04-12 12:05:57 +000023BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
Eric Andersen4bcdd722001-10-24 05:26:42 +000024
25
Eric Andersenc9f20d92002-12-05 08:41:41 +000026#--------------------------------------------------------
Eric Andersen85208e22002-04-12 12:05:57 +000027# With a modern GNU make(1) (highly recommended, that's what all the
28# developers use), all of the following configuration values can be
29# overridden at the command line. For example:
30# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
Eric Andersenc9f20d92002-12-05 08:41:41 +000031#--------------------------------------------------------
Eric Andersen4bcdd722001-10-24 05:26:42 +000032
Eric Andersenc9f20d92002-12-05 08:41:41 +000033# 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
Eric Andersen5912acb2003-11-05 11:34:26 +000037CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
Eric Andersenbae7c1a2003-03-07 17:27:51 +000038#CROSS =/usr/i386-linux-uclibc/bin/i386-uclibc-
Eric Andersen5912acb2003-11-05 11:34:26 +000039CC = $(CROSS)gcc
40AR = $(CROSS)ar
41AS = $(CROSS)as
42LD = $(CROSS)ld
43NM = $(CROSS)nm
44STRIP = $(CROSS)strip
45CPP = $(CC) -E
Robert Griebl53f133a2002-12-16 21:55:39 +000046MAKEFILES = $(TOPDIR).config
Eric Andersen85208e22002-04-12 12:05:57 +000047
Eric Andersenc9f20d92002-12-05 08:41:41 +000048# What OS are you compiling busybox for? This allows you to include
49# OS specific things, syscall overrides, etc.
Eric Andersen5912acb2003-11-05 11:34:26 +000050TARGET_OS=linux
Eric Andersen85208e22002-04-12 12:05:57 +000051
Eric Andersenc9f20d92002-12-05 08:41:41 +000052# Select the compiler needed to build binaries for your development system
Eric Andersen5912acb2003-11-05 11:34:26 +000053HOSTCC = gcc
Robert Griebl53f133a2002-12-16 21:55:39 +000054HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
Eric Andersenc9f20d92002-12-05 08:41:41 +000055
Eric Andersen85d9d802003-01-14 09:12:39 +000056# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
57LC_ALL:= C
58
Eric Andersenc9f20d92002-12-05 08:41:41 +000059# If you want to add some simple compiler switches (like -march=i686),
60# especially from the command line, use this instead of CFLAGS directly.
61# For optimization overrides, it's better still to set OPTIMIZATION.
62CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
63
64# If you have a "pristine" source directory, point BB_SRC_DIR to it.
65# Experimental and incomplete; tell the mailing list
66# <busybox@busybox.net> if you do or don't like it so far.
Robert Griebl53f133a2002-12-16 21:55:39 +000067BB_SRC_DIR=
Eric Andersen85208e22002-04-12 12:05:57 +000068
69# To compile vs some other alternative libc, you may need to use/adjust
70# the following lines to meet your needs...
71#
72# If you are using Red Hat 6.x with the compatible RPMs (for developing under
73# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
74# using the compatible RPMs (compat-*) at http://www.redhat.com !
75#LIBCDIR:=/usr/i386-glibc20-linux
76#
Eric Andersen0a14c9f2003-07-22 08:56:01 +000077# For other libraries, you are on your own. But these may (or may not) help...
Eric Andersen85208e22002-04-12 12:05:57 +000078#LDFLAGS+=-nostdlib
79#LIBRARIES:=$(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")
82
Robert Griebl53f133a2002-12-16 21:55:39 +000083WARNINGS=-Wall -Wstrict-prototypes -Wshadow
84CFLAGS=-I$(TOPDIR)include
85ARFLAGS=-r
Eric Andersen85208e22002-04-12 12:05:57 +000086
Eric Andersenc9f20d92002-12-05 08:41:41 +000087#--------------------------------------------------------
88export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
Eric Andersen5912acb2003-11-05 11:34:26 +000089ifeq ($(strip $(TARGET_ARCH)),)
90TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
Eric Andersen5b0f9e42002-06-23 04:50:49 +000091 -e 's/i.86/i386/' \
92 -e 's/sparc.*/sparc/' \
93 -e 's/arm.*/arm/g' \
94 -e 's/m68k.*/m68k/' \
95 -e 's/ppc/powerpc/g' \
96 -e 's/v850.*/v850/g' \
97 -e 's/sh[234]/sh/' \
Eric Andersenc9f20d92002-12-05 08:41:41 +000098 -e 's/mips-.*/mips/' \
99 -e 's/mipsel-.*/mipsel/' \
100 -e 's/cris.*/cris/' \
101 )
Eric Andersen5912acb2003-11-05 11:34:26 +0000102endif
Eric Andersenc9f20d92002-12-05 08:41:41 +0000103
Glenn L McGrath3bff6662003-08-29 12:23:09 +0000104# Pull in the user's busybox configuration
Eric Andersenc9f20d92002-12-05 08:41:41 +0000105ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
Eric Andersenc9f20d92002-12-05 08:41:41 +0000106-include $(TOPDIR).config
107endif
108
Eric Andersen1b6eb9b2002-10-30 06:55:37 +0000109# A nifty macro to make testing gcc features easier
110check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
111 then echo "$(1)"; else echo "$(2)"; fi)
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000112
113#--------------------------------------------------------
114# Arch specific compiler optimization stuff should go here.
115# Unless you want to override the defaults, do not set anything
116# for OPTIMIZATION...
117
118# use '-Os' optimization if available, else use -O2
Robert Griebl53f133a2002-12-16 21:55:39 +0000119OPTIMIZATION=
120OPTIMIZATION=${call check_gcc,-Os,-O2}
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000121
122# Some nice architecture specific optimizations
123ifeq ($(strip $(TARGET_ARCH)),arm)
124 OPTIMIZATION+=-fstrict-aliasing
125endif
126ifeq ($(strip $(TARGET_ARCH)),i386)
Eric Andersen0a14c9f2003-07-22 08:56:01 +0000127 OPTIMIZATION+=$(call check_gcc,-march=i386,)
Eric Andersen1b6eb9b2002-10-30 06:55:37 +0000128 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
129 OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
130 -malign-functions=0 -malign-jumps=0 -malign-loops=0)
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000131endif
Robert Griebl53f133a2002-12-16 21:55:39 +0000132OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
Eric Andersen5b0f9e42002-06-23 04:50:49 +0000133
Eric Andersen85208e22002-04-12 12:05:57 +0000134#
135#--------------------------------------------------------
136# If you're going to do a lot of builds with a non-vanilla configuration,
137# it makes sense to adjust parameters above, so you can type "make"
138# by itself, instead of following it by the same half-dozen overrides
139# every time. The stuff below, on the other hand, is probably less
140# prone to casual user adjustment.
141#
142
Eric Andersene5272072003-07-22 22:15:21 +0000143ifeq ($(strip $(CONFIG_LFS)),y)
Eric Andersen85208e22002-04-12 12:05:57 +0000144 # For large file summit support
Eric Andersenecfa2902002-09-22 12:09:44 +0000145 CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
Eric Andersen85208e22002-04-12 12:05:57 +0000146endif
Eric Andersene5272072003-07-22 22:15:21 +0000147ifeq ($(strip $(CONFIG_DMALLOC)),y)
Eric Andersen85208e22002-04-12 12:05:57 +0000148 # For testing mem leaks with dmalloc
149 CFLAGS+=-DDMALLOC
150 LIBRARIES:=-ldmalloc
Eric Andersen85208e22002-04-12 12:05:57 +0000151else
Eric Andersene5272072003-07-22 22:15:21 +0000152 ifeq ($(strip $(CONFIG_EFENCE)),y)
Eric Andersen85208e22002-04-12 12:05:57 +0000153 LIBRARIES:=-lefence
Eric Andersen85208e22002-04-12 12:05:57 +0000154 endif
155endif
Eric Andersene5272072003-07-22 22:15:21 +0000156ifeq ($(strip $(CONFIG_DEBUG)),y)
Eric Andersen85208e22002-04-12 12:05:57 +0000157 CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
158 LDFLAGS +=-Wl,-warn-common
159 STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
160else
Eric Andersenbae7c1a2003-03-07 17:27:51 +0000161 CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
Eric Andersen85208e22002-04-12 12:05:57 +0000162 LDFLAGS += -s -Wl,-warn-common
163 STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
164endif
Eric Andersene5272072003-07-22 22:15:21 +0000165ifeq ($(strip $(CONFIG_STATIC)),y)
Eric Andersen85208e22002-04-12 12:05:57 +0000166 LDFLAGS += --static
167endif
168
Eric Andersen12f834c2002-10-26 10:17:24 +0000169ifeq ($(strip $(PREFIX)),)
Eric Andersen85208e22002-04-12 12:05:57 +0000170 PREFIX:=`pwd`/_install
171endif
172
173# Additional complications due to support for pristine source dir.
174# Include files in the build directory should take precedence over
175# the copy in BB_SRC_DIR, both during the compilation phase and the
176# shell script that finds the list of object files.
177# Work in progress by <ldoolitt@recycle.lbl.gov>.
178#
179ifneq ($(strip $(BB_SRC_DIR)),)
180 VPATH:=$(BB_SRC_DIR)
181endif
182
Eric Andersen85208e22002-04-12 12:05:57 +0000183OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
184CFLAGS += $(CROSS_CFLAGS)
185ifdef BB_INIT_SCRIPT
186 CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
187endif
188
189# Put user-supplied flags at the end, where they
190# have a chance of winning.
191CFLAGS += $(CFLAGS_EXTRA)
Eric Andersen4bcdd722001-10-24 05:26:42 +0000192
193%.o: %.c
Eric Andersen85208e22002-04-12 12:05:57 +0000194 $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
Eric Andersen4bcdd722001-10-24 05:26:42 +0000195
Eric Andersen85208e22002-04-12 12:05:57 +0000196ifdef _FASTDEP_ALL_SUB_DIRS
Eric Andersen4bcdd722001-10-24 05:26:42 +0000197fastdep: dummy
Eric Andersen85208e22002-04-12 12:05:57 +0000198 $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
Eric Andersen4bcdd722001-10-24 05:26:42 +0000199ifdef ALL_SUB_DIRS
200 $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
201endif
202
Eric Andersen4bcdd722001-10-24 05:26:42 +0000203$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
204 $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
205endif
206
Eric Andersen85208e22002-04-12 12:05:57 +0000207.PHONY: dummy
Eric Andersen4bcdd722001-10-24 05:26:42 +0000208
Eric Andersen4bcdd722001-10-24 05:26:42 +0000209
Eric Andersen4bcdd722001-10-24 05:26:42 +0000210
Eric Andersen85208e22002-04-12 12:05:57 +0000211.EXPORT_ALL_VARIABLES:
Eric Andersen4bcdd722001-10-24 05:26:42 +0000212