1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
# Rules.make for busybox
#
# Copyright (C) 2001-2003 Erik Andersen <andersen@codepoet.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#--------------------------------------------------------
PROG := busybox
VERSION := 1.00-pre4
BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
#--------------------------------------------------------
# With a modern GNU make(1) (highly recommended, that's what all the
# developers use), all of the following configuration values can be
# overridden at the command line. For example:
# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
#--------------------------------------------------------
# If you are running a cross compiler, you will want to set 'CROSS'
# to something more interesting... Target architecture is determined
# by asking the CC compiler what arch it compiles things for, so unless
# your compiler is broken, you should not need to specify TARGET_ARCH
CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
#CROSS =/usr/i386-linux-uclibc/bin/i386-uclibc-
CC = $(CROSS)gcc
AR = $(CROSS)ar
AS = $(CROSS)as
LD = $(CROSS)ld
NM = $(CROSS)nm
STRIP = $(CROSS)strip
CPP = $(CC) -E
MAKEFILES = $(TOPDIR).config
# What OS are you compiling busybox for? This allows you to include
# OS specific things, syscall overrides, etc.
TARGET_OS=linux
# Select the compiler needed to build binaries for your development system
HOSTCC = gcc
HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
LC_ALL:= C
# If you want to add some simple compiler switches (like -march=i686),
# especially from the command line, use this instead of CFLAGS directly.
# For optimization overrides, it's better still to set OPTIMIZATION.
CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
# If you have a "pristine" source directory, point BB_SRC_DIR to it.
# Experimental and incomplete; tell the mailing list
# <busybox@busybox.net> if you do or don't like it so far.
BB_SRC_DIR=
# To compile vs some other alternative libc, you may need to use/adjust
# the following lines to meet your needs...
#
# If you are using Red Hat 6.x with the compatible RPMs (for developing under
# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
# using the compatible RPMs (compat-*) at http://www.redhat.com !
#LIBCDIR:=/usr/i386-glibc20-linux
#
# For other libraries, you are on your own. But these may (or may not) help...
#LDFLAGS+=-nostdlib
#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
WARNINGS=-Wall -Wstrict-prototypes -Wshadow
CFLAGS=-I$(TOPDIR)include
ARFLAGS=-r
#--------------------------------------------------------
export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
ifeq ($(strip $(TARGET_ARCH)),)
TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
-e 's/i.86/i386/' \
-e 's/sparc.*/sparc/' \
-e 's/arm.*/arm/g' \
-e 's/m68k.*/m68k/' \
-e 's/ppc/powerpc/g' \
-e 's/v850.*/v850/g' \
-e 's/sh[234]/sh/' \
-e 's/mips-.*/mips/' \
-e 's/mipsel-.*/mipsel/' \
-e 's/cris.*/cris/' \
)
endif
# Pull in the user's busybox configuration
ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
-include $(TOPDIR).config
endif
# A nifty macro to make testing gcc features easier
check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
then echo "$(1)"; else echo "$(2)"; fi)
#--------------------------------------------------------
# Arch specific compiler optimization stuff should go here.
# Unless you want to override the defaults, do not set anything
# for OPTIMIZATION...
# use '-Os' optimization if available, else use -O2
OPTIMIZATION=
OPTIMIZATION=${call check_gcc,-Os,-O2}
# Some nice architecture specific optimizations
ifeq ($(strip $(TARGET_ARCH)),arm)
OPTIMIZATION+=-fstrict-aliasing
endif
ifeq ($(strip $(TARGET_ARCH)),i386)
OPTIMIZATION+=$(call check_gcc,-march=i386,)
OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
-malign-functions=0 -malign-jumps=0 -malign-loops=0)
endif
OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
#
#--------------------------------------------------------
# If you're going to do a lot of builds with a non-vanilla configuration,
# it makes sense to adjust parameters above, so you can type "make"
# by itself, instead of following it by the same half-dozen overrides
# every time. The stuff below, on the other hand, is probably less
# prone to casual user adjustment.
#
ifeq ($(strip $(CONFIG_LFS)),y)
# For large file summit support
CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
endif
ifeq ($(strip $(CONFIG_DMALLOC)),y)
# For testing mem leaks with dmalloc
CFLAGS+=-DDMALLOC
LIBRARIES:=-ldmalloc
else
ifeq ($(strip $(CONFIG_EFENCE)),y)
LIBRARIES:=-lefence
endif
endif
ifeq ($(strip $(CONFIG_DEBUG)),y)
CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
LDFLAGS +=-Wl,-warn-common
STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
else
CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
LDFLAGS += -s -Wl,-warn-common
STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
endif
ifeq ($(strip $(CONFIG_STATIC)),y)
LDFLAGS += --static
endif
ifeq ($(strip $(PREFIX)),)
PREFIX:=`pwd`/_install
endif
# Additional complications due to support for pristine source dir.
# Include files in the build directory should take precedence over
# the copy in BB_SRC_DIR, both during the compilation phase and the
# shell script that finds the list of object files.
# Work in progress by <ldoolitt@recycle.lbl.gov>.
#
ifneq ($(strip $(BB_SRC_DIR)),)
VPATH:=$(BB_SRC_DIR)
endif
OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
CFLAGS += $(CROSS_CFLAGS)
ifdef BB_INIT_SCRIPT
CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
endif
# Put user-supplied flags at the end, where they
# have a chance of winning.
CFLAGS += $(CFLAGS_EXTRA)
%.o: %.c
$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
ifdef _FASTDEP_ALL_SUB_DIRS
fastdep: dummy
$(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
ifdef ALL_SUB_DIRS
$(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
endif
$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
$(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
endif
.PHONY: dummy
.EXPORT_ALL_VARIABLES:
|
